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2020-05-28csky: Fixup CONFIG_PREEMPT panicGuo Ren3-27/+11
log: [    0.13373200] Calibrating delay loop... [    0.14077600] ------------[ cut here ]------------ [    0.14116700] WARNING: CPU: 0 PID: 0 at kernel/sched/core.c:3790 preempt_count_add+0xc8/0x11c [    0.14348000] DEBUG_LOCKS_WARN_ON((preempt_count() < 0))Modules linked in: [    0.14395100] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.6.0 #7 [    0.14410800] [    0.14427400] Call Trace: [    0.14450700] [<807cd226>] dump_stack+0x8a/0xe4 [    0.14473500] [<80072792>] __warn+0x10e/0x15c [    0.14495900] [<80072852>] warn_slowpath_fmt+0x72/0xc0 [    0.14518600] [<800a5240>] preempt_count_add+0xc8/0x11c [    0.14544900] [<807ef918>] _raw_spin_lock+0x28/0x68 [    0.14572600] [<800e0eb8>] vprintk_emit+0x84/0x2d8 [    0.14599000] [<800e113a>] vprintk_default+0x2e/0x44 [    0.14625100] [<800e2042>] vprintk_func+0x12a/0x1d0 [    0.14651300] [<800e1804>] printk+0x30/0x48 [    0.14677600] [<80008052>] lockdep_init+0x12/0xb0 [    0.14703800] [<80002080>] start_kernel+0x558/0x7f8 [    0.14730000] [<800052bc>] csky_start+0x58/0x94 [    0.14756600] irq event stamp: 34 [    0.14775100] hardirqs last  enabled at (33): [<80067370>] ret_from_exception+0x2c/0x72 [    0.14793700] hardirqs last disabled at (34): [<800e0eae>] vprintk_emit+0x7a/0x2d8 [    0.14812300] softirqs last  enabled at (32): [<800655b0>] __do_softirq+0x578/0x6d8 [    0.14830800] softirqs last disabled at (25): [<8007b3b8>] irq_exit+0xec/0x128 The preempt_count of reg could be destroyed after csky_do_IRQ without reload from memory. After reference to other architectures (arm64, riscv), we move preempt entry into ret_from_exception and disable irq at the beginning of ret_from_exception instead of RESTORE_ALL. Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Reported-by: Lu Baoquan <lu.baoquan@intellif.com>
2020-05-25Linux 5.7-rc7v5.7-rc7Linus Torvalds1-1/+1
2020-05-24net: smsc911x: Fix runtime PM imbalance on errorDinghao Liu1-4/+5
Remove runtime PM usage counter decrement when the increment function has not been called to keep the counter balanced. Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-24net/mlx4_core: fix a memory leak bug.Qiushi Wu1-1/+1
In function mlx4_opreq_action(), pointer "mailbox" is not released, when mlx4_cmd_box() return and error, causing a memory leak bug. Fix this issue by going to "out" label, mlx4_free_cmd_mailbox() can free this pointer. Fixes: fe6f700d6cbb ("net/mlx4_core: Respond to operation request by firmware") Signed-off-by: Qiushi Wu <wu000273@umn.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-24net: ethernet: ti: cpsw: fix ASSERT_RTNL() warning during suspendGrygorii Strashko1-0/+4
vlan_for_each() are required to be called with rtnl_lock taken, otherwise ASSERT_RTNL() warning will be triggered - which happens now during System resume from suspend: cpsw_suspend() |- cpsw_ndo_stop() |- __hw_addr_ref_unsync_dev() |- cpsw_purge_all_mc() |- vlan_for_each() |- ASSERT_RTNL(); Hence, fix it by surrounding cpsw_ndo_stop() by rtnl_lock/unlock() calls. Fixes: 15180eca569b ("net: ethernet: ti: cpsw: fix vlan mcast") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-24net: phy: mscc: fix initialization of the MACsec protocol modeAntoine Tenart5-10/+21
At the very end of the MACsec block initialization in the MSCC PHY driver, the MACsec "protocol mode" is set. This setting should be set based on the PHY id within the package, as the bank used to access the register used depends on this. This was not done correctly, and only the first bank was used leading to the two upper PHYs being unstable when using the VSC8584. This patch fixes it. Fixes: 1bbe0ecc2a1a ("net: phy: mscc: macsec initialization") Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-24net: stmmac: don't attach interface until resume finishesLeon Yu1-2/+2
Commit 14b41a2959fb ("net: stmmac: Delete txtimer in suspend") was the first attempt to fix a race between mod_timer() and setup_timer() during stmmac_resume(). However the issue still exists as the commit only addressed half of the issue. Same race can still happen as stmmac_resume() re-attaches interface way too early - even before hardware is fully initialized. Worse, doing so allows network traffic to restart and stmmac_tx_timer_arm() being called in the middle of stmmac_resume(), which re-init tx timers in stmmac_init_coalesce(). timer_list will be corrupted and system crashes as a result of race between mod_timer() and setup_timer(). systemd--1995 2.... 552950018us : stmmac_suspend: 4994 ksoftirq-9 0..s2 553123133us : stmmac_tx_timer_arm: 2276 systemd--1995 0.... 553127896us : stmmac_resume: 5101 systemd--320 7...2 553132752us : stmmac_tx_timer_arm: 2276 (sd-exec-1999 5...2 553135204us : stmmac_tx_timer_arm: 2276 --------------------------------- pc : run_timer_softirq+0x468/0x5e0 lr : run_timer_softirq+0x570/0x5e0 Call trace: run_timer_softirq+0x468/0x5e0 __do_softirq+0x124/0x398 irq_exit+0xd8/0xe0 __handle_domain_irq+0x6c/0xc0 gic_handle_irq+0x60/0xb0 el1_irq+0xb8/0x180 arch_cpu_idle+0x38/0x230 default_idle_call+0x24/0x3c do_idle+0x1e0/0x2b8 cpu_startup_entry+0x28/0x48 secondary_start_kernel+0x1b4/0x208 Fix this by deferring netif_device_attach() to the end of stmmac_resume(). Signed-off-by: Leon Yu <leoyu@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-24net: Fix return value about devm_platform_ioremap_resource()Tiezhu Yang4-4/+7
When call function devm_platform_ioremap_resource(), we should use IS_ERR() to check the return value and return PTR_ERR() if failed. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23sparc32: fix page table traversal in srmmu_nocache_init()Mike Rapoport1-2/+2
The srmmu_nocache_init() uses __nocache_fix() macro to add an offset to page table entry to access srmmu_nocache_pool. But since sparc32 has only three actual page table levels, pgd, p4d and pud are essentially the same thing and pgd_offset() and p4d_offset() are no-ops, the __nocache_fix() should be done only at PUD level. Remove __nocache_fix() for p4d_offset() and pud_offset() and keep it only for PUD and lower levels. Fixes: c2bc26f7ca1f ("sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init()") Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Cc: David S. Miller <davem@davemloft.net> Cc: Anatoly Pugachev <matorola@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23MAINTAINERS: add files related to kdumpBaoquan He1-0/+5
Kdump is implemented based on kexec, however some files are only related to crash dumping and missing, add them to KDUMP entry. Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Dave Young <dyoung@redhat.com> Link: http://lkml.kernel.org/r/20200520103633.GW5029@MiWiFi-R3L-srv Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23z3fold: fix use-after-free when freeing handlesUladzislau Rezki1-5/+6
free_handle() for a foreign handle may race with inter-page compaction, what can lead to memory corruption. To avoid that, take write lock not read lock in free_handle to be synchronized with __release_z3fold_page(). For example KASAN can detect it: ================================================================== BUG: KASAN: use-after-free in LZ4_decompress_safe+0x2c4/0x3b8 Read of size 1 at addr ffffffc976695ca3 by task GoogleApiHandle/4121 CPU: 0 PID: 4121 Comm: GoogleApiHandle Tainted: P S OE 4.19.81-perf+ #162 Hardware name: Sony Mobile Communications. PDX-203(KONA) (DT) Call trace: LZ4_decompress_safe+0x2c4/0x3b8 lz4_decompress_crypto+0x3c/0x70 crypto_decompress+0x58/0x70 zcomp_decompress+0xd4/0x120 ... Apart from that, initialize zhdr->mapped_count in init_z3fold_page() and remove "newpage" variable because it is not used anywhere. Signed-off-by: Uladzislau Rezki <uladzislau.rezki@sony.com> Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Qian Cai <cai@lca.pw> Cc: Raymond Jennings <shentino@gmail.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200520082100.28876-1-vitaly.wool@konsulko.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init()Mike Rapoport1-1/+1
The kbuild test robot reported the following warning: arch/sparc/mm/srmmu.c: In function 'srmmu_nocache_init': arch/sparc/mm/srmmu.c:300:9: error: variable 'pud' set but not used [-Werror=unused-but-set-variable] 300 | pud_t *pud; This warning is caused by misprint in the page table traversal in srmmu_nocache_init() function which accessed a PMD entry using PGD rather than PUD. Since sparc32 has only 3 page table levels, the PGD and PUD are essentially the same and usage of __nocache_fix() removed the type checking. Use PUD for the consistency and to silence the compiler warning. Fixes: 7235db268a2777bc38 ("sparc32: use pgtable-nopud instead of 4level-fixup") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: David S. Miller <davem@davemloft.net> Cc: Anatoly Pugachev <matorola@gmail.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200520132005.GM1059226@linux.ibm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23MAINTAINERS: update email address for Naoya HoriguchiNaoya Horiguchi1-1/+1
My email address has changed due to system upgrade, so please update it in MAINTAINERS list. My old address (n-horiguchi@ah.jp.nec.com) will be still active for a few months. Note that my email system has some encoding issue and can't send patches in raw format via git-send-email. So patches from me will be delivered via my free address (nao.horiguchi@gmail.com) or GitHub. Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/1589874488-9247-1-git-send-email-naoya.horiguchi@nec.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23sh: include linux/time_types.h for sockiosArnd Bergmann1-0/+2
Using the socket ioctls on arch/sh (and only there) causes build time problems when __kernel_old_timeval/__kernel_old_timespec are not already visible to the compiler. Add an explict include line for the header that defines these structures. Fixes: 8c709f9a0693 ("y2038: sh: remove timeval/timespec usage from headers") Fixes: 0768e17073dc ("net: socket: implement 64-bit timestamps") Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Rich Felker <dalias@libc.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200519131327.1836482-1-arnd@arndb.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23kasan: disable branch tracing for core runtimeMarco Elver3-10/+8
During early boot, while KASAN is not yet initialized, it is possible to enter reporting code-path and end up in kasan_report(). While uninitialized, the branch there prevents generating any reports, however, under certain circumstances when branches are being traced (TRACE_BRANCH_PROFILING), we may recurse deep enough to cause kernel reboots without warning. To prevent similar issues in future, we should disable branch tracing for the core runtime. [elver@google.com: remove duplicate DISABLE_BRANCH_PROFILING, per Qian Cai] Link: https://lore.kernel.org/lkml/20200517011732.GE24705@shao2-debian/ Link: http://lkml.kernel.org/r/20200522075207.157349-1-elver@google.com Reported-by: kernel test robot <rong.a.chen@intel.com> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrey Konovalov <andreyknvl@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Qian Cai <cai@lca.pw> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r//20200517011732.GE24705@shao2-debian/ Link: http://lkml.kernel.org/r/20200519182459.87166-1-elver@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23selftests/vm/write_to_hugetlbfs.c: fix unused variable warningJohn Hubbard1-2/+0
Remove unused variable "i", which was triggering a compiler warning. Fixes: 29750f71a9b4 ("hugetlb_cgroup: add hugetlb_cgroup reservation tests") Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-By: Mina Almasry <almasrymina@google.com> Cc: Brian Geffon <bgeffon@google.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Ralph Campbell <rcampbell@nvidia.com> Link: http://lkml.kernel.org/r/20200517001245.361762-2-jhubbard@nvidia.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23selftests/vm/.gitignore: add mremap_dontunmapJohn Hubbard1-0/+1
Add mremap_dontunmap to .gitignore. Fixes: 0c28759ee3c9 ("selftests: add MREMAP_DONTUNMAP selftest") Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Brian Geffon <bgeffon@google.com> Link: http://lkml.kernel.org/r/20200517002509.362401-2-jhubbard@nvidia.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23rapidio: fix an error in get_user_pages_fast() error handlingJohn Hubbard1-0/+5
In the case of get_user_pages_fast() returning fewer pages than requested, rio_dma_transfer() does not quite do the right thing. It attempts to release all the pages that were requested, rather than just the pages that were pinned. Fix the error handling so that only the pages that were successfully pinned are released. Fixes: e8de370188d0 ("rapidio: add mport char device driver") Signed-off-by: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Alexandre Bounine <alex.bou9@gmail.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/20200517235620.205225-2-jhubbard@nvidia.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23x86: bitops: fix build regressionNick Desaulniers1-6/+6
This is easily reproducible via CC=clang + CONFIG_STAGING=y + CONFIG_VT6656=m. It turns out that if your config tickles __builtin_constant_p via differences in choices to inline or not, these statements produce invalid assembly: $ cat foo.c long a(long b, long c) { asm("orb %1, %0" : "+q"(c): "r"(b)); return c; } $ gcc foo.c foo.c: Assembler messages: foo.c:2: Error: `%rax' not allowed with `orb' Use the `%b` "x86 Operand Modifier" to instead force register allocation to select a lower-8-bit GPR operand. The "q" constraint only has meaning on -m32 otherwise is treated as "r". Not all GPRs have low-8-bit aliases for -m32. Fixes: 1651e700664b4 ("x86: Fix bitops.h warning with a moved cast") Reported-by: kernelci.org bot <bot@kernelci.org> Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Suggested-by: Brian Gerst <brgerst@gmail.com> Suggested-by: H. Peter Anvin <hpa@zytor.com> Suggested-by: Ilie Halip <ilie.halip@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> [build, clang-11] Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-By: Brian Gerst <brgerst@gmail.com> Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Marco Elver <elver@google.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Daniel Axtens <dja@axtens.net> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org> Link: http://lkml.kernel.org/r/20200508183230.229464-1-ndesaulniers@google.com Link: https://github.com/ClangBuiltLinux/linux/issues/961 Link: https://lore.kernel.org/lkml/20200504193524.GA221287@google.com/ Link: https://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html#x86Operandmodifiers Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23device-dax: don't leak kernel memory to user space after unloading kmemDavid Hildenbrand1-3/+11
Assume we have kmem configured and loaded: [root@localhost ~]# cat /proc/iomem ... 140000000-33fffffff : Persistent Memory$ 140000000-1481fffff : namespace0.0 150000000-33fffffff : dax0.0 150000000-33fffffff : System RAM Assume we try to unload kmem. This force-unloading will work, even if memory cannot get removed from the system. [root@localhost ~]# rmmod kmem [ 86.380228] removing memory fails, because memory [0x0000000150000000-0x0000000157ffffff] is onlined ... [ 86.431225] kmem dax0.0: DAX region [mem 0x150000000-0x33fffffff] cannot be hotremoved until the next reboot Now, we can reconfigure the namespace: [root@localhost ~]# ndctl create-namespace --force --reconfig=namespace0.0 --mode=devdax [ 131.409351] nd_pmem namespace0.0: could not reserve region [mem 0x140000000-0x33fffffff]dax [ 131.410147] nd_pmem: probe of namespace0.0 failed with error -16namespace0.0 --mode=devdax ... This fails as expected due to the busy memory resource, and the memory cannot be used. However, the dax0.0 device is removed, and along its name. The name of the memory resource now points at freed memory (name of the device): [root@localhost ~]# cat /proc/iomem ... 140000000-33fffffff : Persistent Memory 140000000-1481fffff : namespace0.0 150000000-33fffffff : �_�^7_��/_��wR��WQ���^��� ... 150000000-33fffffff : System RAM We have to make sure to duplicate the string. While at it, remove the superfluous setting of the name and fixup a stale comment. Fixes: 9f960da72b25 ("device-dax: "Hotremove" persistent memory that is used like normal RAM") Signed-off-by: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@vger.kernel.org> [5.3] Link: http://lkml.kernel.org/r/20200508084217.9160-2-david@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-05-23Revert "kobject: Make sure the parent does not get released before its children"Greg Kroah-Hartman1-20/+10
This reverts commit 4ef12f7198023c09ad6d25b652bd8748c965c7fa. Guenter reports: All my arm64be (arm64 big endian) boot tests crash with this patch applied. Reverting it fixes the problem. Crash log and bisect results (from pending-fixes branch) below. And also: arm64 images don't crash but report lots of "poison overwritten" backtraces like the one below. On arm, I see "refcount_t: underflow", also attached. I didn't bisect those, but given the context I would suspect the same culprit. Reported-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20200513151840.36400-1-heikki.krogerus@linux.intel.com Cc: Naresh Kamboju <naresh.kamboju@linaro.org> Cc: kernel test robot <rong.a.chen@intel.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-23net/mlx5: Fix error flow in case of function_setup failureShay Drory1-1/+2
Currently, if an error occurred during mlx5_function_setup(), we keep dev->state as DEVICE_STATE_UP. Fixing it by adding a goto label. Fixes: e161105e58da ("net/mlx5: Function setup/teardown procedures") Signed-off-by: Shay Drory <shayd@mellanox.com> Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5e: CT: Correctly get flow ruleRoi Dayan2-3/+6
The correct way is to us the flow_cls_offload_flow_rule() wrapper instead of f->rule directly. Fixes: 4c3844d9e97e ("net/mlx5e: CT: Introduce connection tracking") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Oz Shlomo <ozsh@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5e: Update netdev txq on completions during closureMoshe Shemesh1-3/+6
On sq closure when we free its descriptors, we should also update netdev txq on completions which would not arrive. Otherwise if we reopen sqs and attach them back, for example on fw fatal recovery flow, we may get tx timeout. Fixes: 29429f3300a3 ("net/mlx5e: Timeout if SQ doesn't flush during close") Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Annotate mutex destroy for root nsRoi Dayan1-0/+6
Invoke mutex_destroy() to catch any errors. Fixes: 2cc43b494a6c ("net/mlx5_core: Managing root flow table") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Don't maintain a case of del_sw_func being nullRoi Dayan1-8/+9
Add del_sw_func cb for root ns. Now there is no need to maintain a case of del_sw_func being null when freeing the node. Fixes: 2cc43b494a6c ("net/mlx5_core: Managing root flow table") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Mark Bloch <markb@mellanox.com> Reviewed-by: Paul Blakey <paulb@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Fix cleaning unmanaged flow tablesRoi Dayan1-5/+6
Unmanaged flow tables doesn't have a parent and tree_put_node() assume there is always a parent if cleaning is needed. fix that. Fixes: 5281a0c90919 ("net/mlx5: fs_core: Introduce unmanaged flow tables") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Mark Bloch <markb@mellanox.com> Reviewed-by: Paul Blakey <paulb@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Fix memory leak in mlx5_events_initMoshe Shemesh1-1/+3
Fix memory leak in mlx5_events_init(), in case create_single_thread_workqueue() fails, events struct should be freed. Fixes: 5d3c537f9070 ("net/mlx5: Handle event of power detection in the PCIE slot") Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5e: Fix inner tirs handlingRoi Dayan4-10/+12
In the cited commit inner_tirs argument was added to create and destroy inner tirs, and no indication was added to mlx5e_modify_tirs_hash() function. In order to have a consistent handling, use inner_indir_tir[0].tirn in tirs destroy/modify function as an indication to whether inner tirs are created. Inner tirs are not created for representors and before this commit, a call to mlx5e_modify_tirs_hash() was sending HW commands to modify non-existent inner tirs. Fixes: 46dc933cee82 ("net/mlx5e: Provide explicit directive if to create inner indirect tirs") Signed-off-by: Roi Dayan <roid@mellanox.com> Reviewed-by: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5e: kTLS, Destroy key object after destroying the TISTariq Toukan1-1/+1
The TLS TIS object contains the dek/key ID. By destroying the key first, the TIS would contain an invalid non-existing key ID. Reverse the destroy order, this also acheives the desired assymetry between the destroy and the create flows. Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support") Signed-off-by: Tariq Toukan <tariqt@mellanox.com> Reviewed-by: Boris Pismenny <borisp@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5e: Fix allowed tc redirect merged eswitch offload casesMaor Dickman3-14/+41
After changing the parent_id to be the same for both NICs of same The cited commit wrongly allow offload of tc redirect flows from VF to uplink and vice versa when devcies are on different eswitch, these cases aren't supported by HW. Disallow the above offloads when devcies are on different eswitch and VF LAG is not configured. Fixes: f6dc1264f1c0 ("net/mlx5e: Disallow tc redirect offload cases we don't support") Signed-off-by: Maor Dickman <maord@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Avoid processing commands before cmdif is readyEran Ben Elisha3-0/+23
When driver is reloading during recovery flow, it can't get new commands till command interface is up again. Otherwise we may get to null pointer trying to access non initialized command structures. Add cmdif state to avoid processing commands while cmdif is not ready. Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters") Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Fix a race when moving command interface to events modeEran Ben Elisha3-4/+40
After driver creates (via FW command) an EQ for commands, the driver will be informed on new commands completion by EQE. However, due to a race in driver's internal command mode metadata update, some new commands will still be miss-handled by driver as if we are in polling mode. Such commands can get two non forced completion, leading to already freed command entry access. CREATE_EQ command, that maps EQ to the command queue must be posted to the command queue while it is empty and no other command should be posted. Add SW mechanism that once the CREATE_EQ command is about to be executed, all other commands will return error without being sent to the FW. Allow sending other commands only after successfully changing the driver's internal command mode metadata. We can safely return error to all other commands while creating the command EQ, as all other commands might be sent from the user/application during driver load. Application can rerun them later after driver's load was finished. Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters") Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23net/mlx5: Add command entry handling completionMoshe Shemesh2-0/+15
When FW response to commands is very slow and all command entries in use are waiting for completion we can have a race where commands can get timeout before they get out of the queue and handled. Timeout completion on uninitialized command will cause releasing command's buffers before accessing it for initialization and then we will get NULL pointer exception while trying access it. It may also cause releasing buffers of another command since we may have timeout completion before even allocating entry index for this command. Add entry handling completion to avoid this race. Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters") Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
2020-05-23rxrpc: Fix a memory leak in rxkad_verify_response()Qiushi Wu1-2/+1
A ticket was not released after a call of the function "rxkad_decrypt_ticket" failed. Thus replace the jump target "temporary_error_free_resp" by "temporary_error_free_ticket". Fixes: 8c2f826dc3631 ("rxrpc: Don't put crypto buffers on the stack") Signed-off-by: Qiushi Wu <wu000273@umn.edu> Signed-off-by: David Howells <dhowells@redhat.com> cc: Markus Elfring <Markus.Elfring@web.de>
2020-05-23rxrpc: Fix a warningDavid Howells1-1/+1
Fix a warning due to an uninitialised variable. le included from ../fs/afs/fs_probe.c:11: ../fs/afs/fs_probe.c: In function 'afs_fileserver_probe_result': ../fs/afs/internal.h:1453:2: warning: 'rtt_us' may be used uninitialized in this function [-Wmaybe-uninitialized] 1453 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) | ^~~~~~ ../fs/afs/fs_probe.c:35:15: note: 'rtt_us' was declared here Signed-off-by: David Howells <dhowells@redhat.com>
2020-05-23net: sun: fix missing release regions in cas_init_one().Qiushi Wu1-2/+1
In cas_init_one(), "pdev" is requested by "pci_request_regions", but it was not released after a call of the function “pci_write_config_byte” failed. Thus replace the jump target “err_write_cacheline” by "err_out_free_res". Fixes: 1f26dac32057 ("[NET]: Add Sun Cassini driver.") Signed-off-by: Qiushi Wu <wu000273@umn.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23net: mscc: ocelot: fix address ageing time (again)Vladimir Oltean1-1/+1
ocelot_set_ageing_time has 2 callers: - felix_set_ageing_time: from drivers/net/dsa/ocelot/felix.c - ocelot_port_attr_ageing_set: from drivers/net/ethernet/mscc/ocelot.c The issue described in the fixed commit below actually happened for the felix_set_ageing_time code path only, since ocelot_port_attr_ageing_set was already dividing by 1000. So to make both paths symmetrical (and to fix addresses getting aged way too fast on Ocelot), stop dividing by 1000 at caller side altogether. Fixes: c0d7eccbc761 ("net: mscc: ocelot: ANA_AUTOAGE_AGE_PERIOD holds a value in seconds, not ms") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23r8169: fix OCP access on RTL8117Heiner Kallweit1-2/+15
According to r8168 vendor driver DASHv3 chips like RTL8168fp/RTL8117 need a special addressing for OCP access. Fix is compile-tested only due to missing test hardware. Fixes: 1287723aa139 ("r8169: add support for RTL8117") Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23selftests: mlxsw: qos_mc_aware: Specify arping timeout as an integerAmit Cohen1-1/+1
Starting from iputils s20190709 (used in Fedora 31), arping does not support timeout being specified as a decimal: $ arping -c 1 -I swp1 -b 192.0.2.66 -q -w 0.1 arping: invalid argument: '0.1' Previously, such timeouts were rounded to an integer. Fix this by specifying the timeout as an integer. Fixes: a5ee171d087e ("selftests: mlxsw: qos_mc_aware: Add a test for UC awareness") Signed-off-by: Amit Cohen <amitc@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23mlxsw: spectrum: Fix use-after-free of split/unsplit/type_set in case reload ↵Jiri Pirko2-2/+20
fails In case of reload fail, the mlxsw_sp->ports contains a pointer to a freed memory (either by reload_down() or reload_up() error path). Fix this by initializing the pointer to NULL and checking it before dereferencing in split/unsplit/type_set callpaths. Fixes: 24cc68ad6c46 ("mlxsw: core: Add support for reload") Reported-by: Danielle Ratson <danieller@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23net: ethernet: stmmac: Enable interface clocks on probe for IPQ806xJonathan McDowell1-0/+13
The ipq806x_gmac_probe() function enables the PTP clock but not the appropriate interface clocks. This means that if the bootloader hasn't done so attempting to bring up the interface will fail with an error like: [ 59.028131] ipq806x-gmac-dwmac 37600000.ethernet: Failed to reset the dma [ 59.028196] ipq806x-gmac-dwmac 37600000.ethernet eth1: stmmac_hw_setup: DMA engine initialization failed [ 59.034056] ipq806x-gmac-dwmac 37600000.ethernet eth1: stmmac_open: Hw setup failed This patch, a slightly cleaned up version of one posted by Sergey Sergeev in: https://forum.openwrt.org/t/support-for-mikrotik-rb3011uias-rm/4064/257 correctly enables the clock; we have already configured the source just before this. Tested on a MikroTik RB3011. Signed-off-by: Jonathan McDowell <noodles@earth.li> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23selftests: netdevsim: Always initialize 'RET' variableIdo Schimmel1-0/+4
The variable is used by log_test() to check if the test case completely successfully or not. In case it is not initialized at the start of a test case, it is possible for the test case to fail despite not encountering any errors. Example: ``` ... TEST: Trap group statistics [ OK ] TEST: Trap policer [FAIL] Policer drop counter was not incremented TEST: Trap policer binding [FAIL] Policer drop counter was not incremented ``` Failure of trap_policer_test() caused trap_policer_bind_test() to fail as well. Fix by adding missing initialization of the variable. Fixes: 5fbff58e27a1 ("selftests: netdevsim: Add test cases for devlink-trap policers") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23netdevsim: Ensure policer drop counter always increasesIdo Schimmel1-2/+1
In case the policer drop counter is retrieved when the jiffies value is a multiple of 64, the counter will not be incremented. This randomly breaks a selftest [1] the reads the counter twice and checks that it was incremented: ``` TEST: Trap policer [FAIL] Policer drop counter was not incremented ``` Fix by always incrementing the counter by 1. [1] tools/testing/selftests/drivers/net/netdevsim/devlink_trap.sh Fixes: ad188458d012 ("netdevsim: Add devlink-trap policer support") Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23net/ethernet/freescale: rework quiesce/activate for ucc_gethValentin Longchamp1-6/+7
ugeth_quiesce/activate are used to halt the controller when there is a link change that requires to reconfigure the mac. The previous implementation called netif_device_detach(). This however causes the initial activation of the netdevice to fail precisely because it's detached. For details, see [1]. A possible workaround was the revert of commit net: linkwatch: add check for netdevice being present to linkwatch_do_dev However, the check introduced in the above commit is correct and shall be kept. The netif_device_detach() is thus replaced with netif_tx_stop_all_queues() that prevents any tranmission. This allows to perform mac config change required by the link change, without detaching the corresponding netdevice and thus not preventing its initial activation. [1] https://lists.openwall.net/netdev/2020/01/08/201 Signed-off-by: Valentin Longchamp <valentin@longchamp.me> Acked-by: Matteo Ghidoni <matteo.ghidoni@ch.abb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23sctp: Start shutdown on association restart if in SHUTDOWN-SENT state and ↵Jere Leppänen1-4/+5
socket is closed Commit bdf6fa52f01b ("sctp: handle association restarts when the socket is closed.") starts shutdown when an association is restarted, if in SHUTDOWN-PENDING state and the socket is closed. However, the rationale stated in that commit applies also when in SHUTDOWN-SENT state - we don't want to move an association to ESTABLISHED state when the socket has been closed, because that results in an association that is unreachable from user space. The problem scenario: 1. Client crashes and/or restarts. 2. Server (using one-to-one socket) calls close(). SHUTDOWN is lost. 3. Client reconnects using the same addresses and ports. 4. Server's association is restarted. The association and the socket move to ESTABLISHED state, even though the server process has closed its descriptor. Also, after step 4 when the server process exits, some resources are leaked in an attempt to release the underlying inet sock structure in ESTABLISHED state: IPv4: Attempt to release TCP socket in state 1 00000000377288c7 Fix by acting the same way as in SHUTDOWN-PENDING state. That is, if an association is restarted in SHUTDOWN-SENT state and the socket is closed, then start shutdown and don't move the association or the socket to ESTABLISHED state. Fixes: bdf6fa52f01b ("sctp: handle association restarts when the socket is closed.") Signed-off-by: Jere Leppänen <jere.leppanen@nokia.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23tipc: block BH before using dst_cacheEric Dumazet1-1/+5
dst_cache_get() documents it must be used with BH disabled. sysbot reported : BUG: using smp_processor_id() in preemptible [00000000] code: /21697 caller is dst_cache_get+0x3a/0xb0 net/core/dst_cache.c:68 CPU: 0 PID: 21697 Comm: Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 check_preemption_disabled lib/smp_processor_id.c:47 [inline] debug_smp_processor_id.cold+0x88/0x9b lib/smp_processor_id.c:57 dst_cache_get+0x3a/0xb0 net/core/dst_cache.c:68 tipc_udp_xmit.isra.0+0xb9/0xad0 net/tipc/udp_media.c:164 tipc_udp_send_msg+0x3e6/0x490 net/tipc/udp_media.c:244 tipc_bearer_xmit_skb+0x1de/0x3f0 net/tipc/bearer.c:526 tipc_enable_bearer+0xb2f/0xd60 net/tipc/bearer.c:331 __tipc_nl_bearer_enable+0x2bf/0x390 net/tipc/bearer.c:995 tipc_nl_bearer_enable+0x1e/0x30 net/tipc/bearer.c:1003 genl_family_rcv_msg_doit net/netlink/genetlink.c:673 [inline] genl_family_rcv_msg net/netlink/genetlink.c:718 [inline] genl_rcv_msg+0x627/0xdf0 net/netlink/genetlink.c:735 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469 genl_rcv+0x24/0x40 net/netlink/genetlink.c:746 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 ____sys_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca29 Fixes: e9c1a793210f ("tipc: add dst_cache support for udp media") Cc: Xin Long <lucien.xin@gmail.com> Cc: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-23net: mvpp2: fix RX hashing for non-10G portsRussell King1-1/+1
When rxhash is enabled on any ethernet port except the first in each CP block, traffic flow is prevented. The analysis is below: I've been investigating this afternoon, and what I've found, comparing a kernel without 895586d5dc32 and with 895586d5dc32 applied is: - The table programmed into the hardware via mvpp22_rss_fill_table() appears to be identical with or without the commit. - When rxhash is enabled on eth2, mvpp2_rss_port_c2_enable() reports that c2.attr[0] and c2.attr[2] are written back containing: - with 895586d5dc32, failing: 00200000 40000000 - without 895586d5dc32, working: 04000000 40000000 - When disabling rxhash, c2.attr[0] and c2.attr[2] are written back as: 04000000 00000000 The second value represents the MVPP22_CLS_C2_ATTR2_RSS_EN bit, the first value is the queue number, which comprises two fields. The high 5 bits are 24:29 and the low three are 21:23 inclusive. This comes from: c2.attr[0] = MVPP22_CLS_C2_ATTR0_QHIGH(qh) | MVPP22_CLS_C2_ATTR0_QLOW(ql); So, the working case gives eth2 a queue id of 4.0, or 32 as per port->first_rxq, and the non-working case a queue id of 0.1, or 1. The allocation of queue IDs seems to be in mvpp2_port_probe(): if (priv->hw_version == MVPP21) port->first_rxq = port->id * port->nrxqs; else port->first_rxq = port->id * priv->max_port_rxqs; Where: if (priv->hw_version == MVPP21) priv->max_port_rxqs = 8; else priv->max_port_rxqs = 32; Making the port 0 (eth0 / eth1) have port->first_rxq = 0, and port 1 (eth2) be 32. It seems the idea is that the first 32 queues belong to port 0, the second 32 queues belong to port 1, etc. mvpp2_rss_port_c2_enable() gets the queue number from it's parameter, 'ctx', which comes from mvpp22_rss_ctx(port, 0). This returns port->rss_ctx[0]. mvpp22_rss_context_create() is responsible for allocating that, which it does by looking for an unallocated priv->rss_tables[] pointer. This table is shared amongst all ports on the CP silicon. When we write the tables in mvpp22_rss_fill_table(), the RSS table entry is defined by: u32 sel = MVPP22_RSS_INDEX_TABLE(rss_ctx) | MVPP22_RSS_INDEX_TABLE_ENTRY(i); where rss_ctx is the context ID (queue number) and i is the index in the table. If we look at what is written: - The first table to be written has "sel" values of 00000000..0000001f, containing values 0..3. This appears to be for eth1. This is table 0, RX queue number 0. - The second table has "sel" values of 00000100..0000011f, and appears to be for eth2. These contain values 0x20..0x23. This is table 1, RX queue number 0. - The third table has "sel" values of 00000200..0000021f, and appears to be for eth3. These contain values 0x40..0x43. This is table 2, RX queue number 0. How do queue numbers translate to the RSS table? There is another table - the RXQ2RSS table, indexed by the MVPP22_RSS_INDEX_QUEUE field of MVPP22_RSS_INDEX and accessed through the MVPP22_RXQ2RSS_TABLE register. Before 895586d5dc32, it was: mvpp2_write(priv, MVPP22_RSS_INDEX, MVPP22_RSS_INDEX_QUEUE(port->first_rxq)); mvpp2_write(priv, MVPP22_RXQ2RSS_TABLE, MVPP22_RSS_TABLE_POINTER(port->id)); and after: mvpp2_write(priv, MVPP22_RSS_INDEX, MVPP22_RSS_INDEX_QUEUE(ctx)); mvpp2_write(priv, MVPP22_RXQ2RSS_TABLE, MVPP22_RSS_TABLE_POINTER(ctx)); Before the commit, for eth2, that would've contained '32' for the index and '1' for the table pointer - mapping queue 32 to table 1. Remember that this is queue-high.queue-low of 4.0. After the commit, we appear to map queue 1 to table 1. That again looks fine on the face of it. Section 9.3.1 of the A8040 manual seems indicate the reason that the queue number is separated. queue-low seems to always come from the classifier, whereas queue-high can be from the ingress physical port number or the classifier depending on the MVPP2_CLS_SWFWD_PCTRL_REG. We set the port bit in MVPP2_CLS_SWFWD_PCTRL_REG, meaning that queue-high comes from the MVPP2_CLS_SWFWD_P2HQ_REG() register... and this seems to be where our bug comes from. mvpp2_cls_oversize_rxq_set() sets this up as: mvpp2_write(port->priv, MVPP2_CLS_SWFWD_P2HQ_REG(port->id), (port->first_rxq >> MVPP2_CLS_OVERSIZE_RXQ_LOW_BITS)); val = mvpp2_read(port->priv, MVPP2_CLS_SWFWD_PCTRL_REG); val |= MVPP2_CLS_SWFWD_PCTRL_MASK(port->id); mvpp2_write(port->priv, MVPP2_CLS_SWFWD_PCTRL_REG, val); Setting the MVPP2_CLS_SWFWD_PCTRL_MASK bit means that the queue-high for eth2 is _always_ 4, so only queues 32 through 39 inclusive are available to eth2. Yet, we're trying to tell the classifier to set queue-high, which will be ignored, to zero. Hence, the queue-high field (MVPP22_CLS_C2_ATTR0_QHIGH()) from the classifier will be ignored. This means we end up directing traffic from eth2 not to queue 1, but to queue 33, and then we tell it to look up queue 33 in the RSS table. However, RSS table has not been programmed for queue 33, and so it ends up (presumably) dropping the packets. It seems that mvpp22_rss_context_create() doesn't take account of the fact that the upper 5 bits of the queue ID can't actually be changed due to the settings in mvpp2_cls_oversize_rxq_set(), _or_ it seems that mvpp2_cls_oversize_rxq_set() has been missed in this commit. Either way, these two functions mutually disagree with what queue number should be used. Looking deeper into what mvpp2_cls_oversize_rxq_set() and the MTU validation is doing, it seems that MVPP2_CLS_SWFWD_P2HQ_REG() is used for over-sized packets attempting to egress through this port. With the classifier having had RSS enabled and directing eth2 traffic to queue 1, we may still have packets appearing on queue 32 for this port. However, the only way we may end up with over-sized packets attempting to egress through eth2 - is if the A8040 forwards frames between its ports. From what I can see, we don't support that feature, and the kernel restricts the egress packet size to the MTU. In any case, if we were to attempt to transmit an oversized packet, we have no support in the kernel to deal with that appearing in the port's receive queue. So, this patch attempts to solve the issue by clearing the MVPP2_CLS_SWFWD_PCTRL_MASK() bit, allowing MVPP22_CLS_C2_ATTR0_QHIGH() from the classifier to define the queue-high field of the queue number. My testing seems to confirm my findings above - clearing this bit means that if I enable rxhash on eth2, the interface can then pass traffic, as we are now directing traffic to RX queue 1 rather than queue 33. Traffic still seems to work with rxhash off as well. Reported-by: Matteo Croce <mcroce@redhat.com> Tested-by: Matteo Croce <mcroce@redhat.com> Fixes: 895586d5dc32 ("net: mvpp2: cls: Use RSS contexts to handle RSS tables") Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-22felix: Fix initialization of ioremap resourcesClaudiu Manoil3-27/+24
The caller of devm_ioremap_resource(), either accidentally or by wrong assumption, is writing back derived resource data to global static resource initialization tables that should have been constant. Meaning that after it computes the final physical start address it saves the address for no reason in the static tables. This doesn't affect the first driver probing after reboot, but it breaks consecutive driver reloads (i.e. driver unbind & bind) because the initialization tables no longer have the correct initial values. So the next probe() will map the device registers to wrong physical addresses, causing ARM SError async exceptions. This patch fixes all of the above. Fixes: 56051948773e ("net: dsa: ocelot: add driver for Felix switch family") Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-22mptcp: use untruncated hash in ADD_ADDR HMACTodd Malsbary4-25/+24
There is some ambiguity in the RFC as to whether the ADD_ADDR HMAC is the rightmost 64 bits of the entire hash or of the leftmost 160 bits of the hash. The intention, as clarified with the author of the RFC, is the entire hash. This change returns the entire hash from mptcp_crypto_hmac_sha (instead of only the first 160 bits), and moves any truncation/selection operation on the hash to the caller. Fixes: 12555a2d97e5 ("mptcp: use rightmost 64 bits in ADD_ADDR HMAC") Reviewed-by: Christoph Paasch <cpaasch@apple.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Todd Malsbary <todd.malsbary@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>