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Non-cryptographic PRNGs may have great statistical properties, but
are usually trivially predictable to someone who knows the algorithm,
given a small sample of their output. An LFSR like prandom_u32() is
particularly simple, even if the sample is widely scattered bits.
It turns out the network stack uses prandom_u32() for some things like
random port numbers which it would prefer are *not* trivially predictable.
Predictability led to a practical DNS spoofing attack. Oops.
This patch replaces the LFSR with a homebrew cryptographic PRNG based
on the SipHash round function, which is in turn seeded with 128 bits
of strong random key. (The authors of SipHash have *not* been consulted
about this abuse of their algorithm.) Speed is prioritized over security;
attacks are rare, while performance is always wanted.
Replacing all callers of prandom_u32() is the quick fix.
Whether to reinstate a weaker PRNG for uses which can tolerate it
is an open question.
Commit f227e3ec3b5c ("random32: update the net random state on interrupt
and activity") was an earlier attempt at a solution. This patch replaces
it.
Reported-by: Amit Klein <aksecurity@gmail.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Eric Dumazet <edumazet@google.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: tytso@mit.edu
Cc: Florian Westphal <fw@strlen.de>
Cc: Marc Plumb <lkml.mplumb@gmail.com>
Fixes: f227e3ec3b5c ("random32: update the net random state on interrupt and activity")
Signed-off-by: George Spelvin <lkml@sdf.org>
Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
[ willy: partial reversal of f227e3ec3b5c; moved SIPROUND definitions
to prandom.h for later use; merged George's prandom_seed() proposal;
inlined siprand_u32(); replaced the net_rand_state[] array with 4
members to fix a build issue; cosmetic cleanups to make checkpatch
happy; fixed RANDOM32_SELFTEST build ]
Signed-off-by: Willy Tarreau <w@1wt.eu>
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Pull drm updates from Dave Airlie:
"Not a major amount of change, the i915 trees got split into display
and gt trees to better facilitate higher level review, and there's a
major refactoring of i915 GEM locking to use more core kernel concepts
(like ww-mutexes). msm gets per-process pagetables, older AMD SI cards
get DC support, nouveau got a bump in displayport support with common
code extraction from i915.
Outside of drm this contains a couple of patches for hexint
moduleparams which you've acked, and a virtio common code tree that
you should also get via it's regular path.
New driver:
- Cadence MHDP8546 DisplayPort bridge driver
core:
- cross-driver scatterlist cleanups
- devm_drm conversions
- remove drm_dev_init
- devm_drm_dev_alloc conversion
ttm:
- lots of refactoring and cleanups
bridges:
- chained bridge support in more drivers
panel:
- misc new panels
scheduler:
- cleanup priority levels
displayport:
- refactor i915 code into helpers for nouveau
i915:
- split into display and GT trees
- WW locking refactoring in GEM
- execbuf2 extension mechanism
- syncobj timeline support
- GEN 12 HOBL display powersaving
- Rocket Lake display additions
- Disable FBC on Tigerlake
- Tigerlake Type-C + DP improvements
- Hotplug interrupt refactoring
amdgpu:
- Sienna Cichlid updates
- Navy Flounder updates
- DCE6 (SI) support for DC
- Plane rotation enabled
- TMZ state info ioctl
- PCIe DPC recovery support
- DC interrupt handling refactor
- OLED panel fixes
amdkfd:
- add SMI events for thermal throttling
- SMI interface events ioctl update
- process eviction counters
radeon:
- move to dma_ for allocations
- expose sclk via sysfs
msm:
- DSI support for sm8150/sm8250
- per-process GPU pagetable support
- Displayport support
mediatek:
- move HDMI phy driver to PHY
- convert mtk-dpi to bridge API
- disable mt2701 tmds
tegra:
- bridge support
exynos:
- misc cleanups
vc4:
- dual display cleanups
ast:
- cleanups
gma500:
- conversion to GPIOd API
hisilicon:
- misc reworks
ingenic:
- clock handling and format improvements
mcde:
- DSI support
mgag200:
- desktop g200 support
mxsfb:
- i.MX7 + i.MX8M
- alpha plane support
panfrost:
- devfreq support
- amlogic SoC support
ps8640:
- EDID from eDP retrieval
tidss:
- AM65xx YUV workaround
virtio:
- virtio-gpu exported resources
rcar-du:
- R8A7742, R8A774E1 and R8A77961 support
- YUV planar format fixes
- non-visible plane handling
- VSP device reference count fix
- Kconfig fix to avoid displaying disabled options in .config"
* tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm: (1494 commits)
drm/ingenic: Fix bad revert
drm/amdgpu: Fix invalid number of character '{' in amdgpu_acpi_init
drm/amdgpu: Remove warning for virtual_display
drm/amdgpu: kfd_initialized can be static
drm/amd/pm: setup APU dpm clock table in SMU HW initialization
drm/amdgpu: prevent spurious warning
drm/amdgpu/swsmu: fix ARC build errors
drm/amd/display: Fix OPTC_DATA_FORMAT programming
drm/amd/display: Don't allow pstate if no support in blank
drm/panfrost: increase readl_relaxed_poll_timeout values
MAINTAINERS: Update entry for st7703 driver after the rename
Revert "gpu/drm: ingenic: Add option to mmap GEM buffers cached"
drm/amd/display: HDMI remote sink need mode validation for Linux
drm/amd/display: Change to correct unit on audio rate
drm/amd/display: Avoid set zero in the requested clk
drm/amdgpu: align frag_end to covered address space
drm/amdgpu: fix NULL pointer dereference for Renoir
drm/vmwgfx: fix regression in thp code due to ttm init refactor.
drm/amdgpu/swsmu: add interrupt work handler for smu11 parts
drm/amdgpu/swsmu: add interrupt work function
...
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Replace commas with semicolons. What is done is essentially described by
the following Coccinelle semantic patch (http://coccinelle.lip6.fr/):
// <smpl>
@@ expression e1,e2; @@
e1
-,
+;
e2
... when any
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of char, misc, and other assorted driver subsystem
patches for 5.10-rc1.
There's a lot of different things in here, all over the drivers/
directory. Some summaries:
- soundwire driver updates
- habanalabs driver updates
- extcon driver updates
- nitro_enclaves new driver
- fsl-mc driver and core updates
- mhi core and bus updates
- nvmem driver updates
- eeprom driver updates
- binder driver updates and fixes
- vbox minor bugfixes
- fsi driver updates
- w1 driver updates
- coresight driver updates
- interconnect driver updates
- misc driver updates
- other minor driver updates
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (396 commits)
binder: fix UAF when releasing todo list
docs: w1: w1_therm: Fix broken xref, mistakes, clarify text
misc: Kconfig: fix a HISI_HIKEY_USB dependency
LSM: Fix type of id parameter in kernel_post_load_data prototype
misc: Kconfig: add a new dependency for HISI_HIKEY_USB
firmware_loader: fix a kernel-doc markup
w1: w1_therm: make w1_poll_completion static
binder: simplify the return expression of binder_mmap
test_firmware: Test partial read support
firmware: Add request_partial_firmware_into_buf()
firmware: Store opt_flags in fw_priv
fs/kernel_file_read: Add "offset" arg for partial reads
IMA: Add support for file reads without contents
LSM: Add "contents" flag to kernel_read_file hook
module: Call security_kernel_post_load_data()
firmware_loader: Use security_post_load_data()
LSM: Introduce kernel_post_load_data() hook
fs/kernel_read_file: Add file_size output argument
fs/kernel_read_file: Switch buffer size arg to size_t
fs/kernel_read_file: Remove redundant size argument
...
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Make it possible to have virtio console built-in when
other virtio drivers are modular.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Amit Shah <amit@kernel.org>
Link: https://lore.kernel.org/r/20200831165850.26163-1-msuchanek@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Reported the cleared bytes in case of a partial clear_user instead
of -EFAULT, and remove a pointless conditional, as cleared must be
non-zero by the time we hit the signal_pending check.
Reported-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20200907082700.2057137-1-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Christophe reported a major speedup due to avoiding the iov_iter
overhead, so just add this trivial function. Note that /dev/zero
already implements both an iter and non-iter writes so this just
makes it more symmetric.
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20200903155922.1111551-1-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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We need the fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use semicolons and braces.
Signed-off-by: Joe Perches <joe@perches.com>
Link: https://lore.kernel.org/r/850c60ea44927e8cb7604d178c613ff8fc667984.1598331148.git.joe@perches.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use kvzalloc() in mspec_mmap() instead of open-coding it.
Signed-off-by: Denis Efremov <efremov@linux.com>
Link: https://lore.kernel.org/r/20200827213421.50429-1-efremov@linux.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull IPMI updates from Corey Minyard:
"Some minor bug fixes, return values, cleanups of prints, conversion of
tasklets to the new API.
The biggest change is retrying the initial information fetch from the
management controller. If that fails, the iterface is not operational,
and one group was having trouble with the management controller not
being ready when the OS started up. So a retry was added"
* tag 'for-linus-5.10-1' of git://github.com/cminyard/linux-ipmi:
ipmi_si: Fix wrong return value in try_smi_init()
ipmi: msghandler: Fix a signedness bug
ipmi: add retry in try_get_dev_id()
ipmi: Clean up some printks
ipmi:msghandler: retry to get device id on an error
ipmi:sm: Print current state when the state is invalid
ipmi: Reset response handler when failing to send the command
ipmi: add a newline when printing parameter 'panic_op' by sysfs
char: ipmi: convert tasklets to use new tasklet_setup() API
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On an error exit path, a negative error code should be returned
instead of a positive return value.
Fixes: 90b2d4f15ff7 ("ipmi_si: Remove hacks for adding a dummy platform devices")
Cc: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Message-Id: <20201005145212.84435-1-tianjia.zhang@linux.alibaba.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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The type for the completion codes should be unsigned char instead of
char. If it is declared as a normal char then the conditions in
__get_device_id() are impossible because the IPMI_DEVICE_IN_FW_UPDATE_ERR
error codes are higher than 127.
drivers/char/ipmi/ipmi_msghandler.c:2449 __get_device_id()
warn: impossible condition '(bmc->cc == 209) => ((-128)-127 == 209)'
Fixes: f8910ffa81b0 ("ipmi:msghandler: retry to get device id on an error")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20200918142756.GB909725@mwanda>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Use a retry machanism to give the BMC more opportunities to correctly
respond when we receive specific completion codes.
This is similar to what is done in __get_device_id().
Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Message-Id: <20200916062129.26129-1-tian.xianting@h3c.com>
[Moved GET_DEVICE_ID_MAX_RETRY to include/linux/ipmi.h, reworded some
text.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Convert to dev_xxx() and fix some verbage.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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We fail to get the BMCS's device id with low probability when loading
the ipmi driver and it causes BMC device registration failed. When this
issue occurs we got below kernel prints:
[Wed Sep 9 19:52:03 2020] ipmi_si IPI0001:00: IPMI message handler:
device id demangle failed: -22
[Wed Sep 9 19:52:03 2020] IPMI BT: using default values
[Wed Sep 9 19:52:03 2020] IPMI BT: req2rsp=5 secs retries=2
[Wed Sep 9 19:52:03 2020] ipmi_si IPI0001:00: Unable to get the
device id: -5
[Wed Sep 9 19:52:04 2020] ipmi_si IPI0001:00: Unable to register
device: error -5
When this issue happens, we want to manually unload the driver and try to
load it again, but it can't be unloaded by 'rmmod' as it is already 'in
use'.
We add a print in handle_one_recv_msg(), when this issue happens,
the msg we received is "Recv: 1c 01 d5", which means the data_len is 1,
data[0] is 0xd5 (completion code), which means "bmc cannot execute
command. Command, or request parameter(s), not supported in present
state". Debug code:
static int handle_one_recv_msg(struct ipmi_smi *intf,
struct ipmi_smi_msg *msg) {
printk("Recv: %*ph\n", msg->rsp_size, msg->rsp);
... ...
}
Then in ipmi_demangle_device_id(), it returned '-EINVAL' as 'data_len < 7'
and 'data[0] != 0'.
We created this patch to retry the get device id when this error
happens. We reproduced this issue again and the retry succeed on the
first retry, we finally got the correct msg and then all is ok:
Recv: 1c 01 00 01 81 05 84 02 af db 07 00 01 00 b9 00 10 00
So use a retry machanism in this patch to give bmc more opportunity to
correctly response kernel when we received specific completion codes.
Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Message-Id: <20200915071817.4484-1-tian.xianting@h3c.com>
[Cleaned up the verbage a bit in the header and prints.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Print current state before returning IPMI_NOT_IN_MY_STATE_ERR so we can
know where this issue is coming from and possibly fix the state machine.
Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Message-Id: <20200915074441.4090-1-tian.xianting@h3c.com>
[Converted printk() to pr_xxx().]
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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When failing to send a command we don't expect a response. Clear the
`null_user_handler` like is done in the success path.
Signed-off-by: Markus Boehme <markubo@amazon.com>
Message-Id: <1599495937-10654-1-git-send-email-markubo@amazon.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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When I cat ipmi_msghandler parameter 'panic_op' by sysfs, it displays as
follows. It's better to add a newline for easy reading.
root@(none):/# cat /sys/module/ipmi_msghandler/parameters/panic_op
noneroot@(none):/#
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Message-Id: <1599130873-2402-1-git-send-email-wangxiongfeng2@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.
Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Message-Id: <20200817091617.28119-3-allen.cryptic@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Pull block updates from Jens Axboe:
- Series of merge handling cleanups (Baolin, Christoph)
- Series of blk-throttle fixes and cleanups (Baolin)
- Series cleaning up BDI, seperating the block device from the
backing_dev_info (Christoph)
- Removal of bdget() as a generic API (Christoph)
- Removal of blkdev_get() as a generic API (Christoph)
- Cleanup of is-partition checks (Christoph)
- Series reworking disk revalidation (Christoph)
- Series cleaning up bio flags (Christoph)
- bio crypt fixes (Eric)
- IO stats inflight tweak (Gabriel)
- blk-mq tags fixes (Hannes)
- Buffer invalidation fixes (Jan)
- Allow soft limits for zone append (Johannes)
- Shared tag set improvements (John, Kashyap)
- Allow IOPRIO_CLASS_RT for CAP_SYS_NICE (Khazhismel)
- DM no-wait support (Mike, Konstantin)
- Request allocation improvements (Ming)
- Allow md/dm/bcache to use IO stat helpers (Song)
- Series improving blk-iocost (Tejun)
- Various cleanups (Geert, Damien, Danny, Julia, Tetsuo, Tian, Wang,
Xianting, Yang, Yufen, yangerkun)
* tag 'block-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (191 commits)
block: fix uapi blkzoned.h comments
blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue
blk-mq: get rid of the dead flush handle code path
block: get rid of unnecessary local variable
block: fix comment and add lockdep assert
blk-mq: use helper function to test hw stopped
block: use helper function to test queue register
block: remove redundant mq check
block: invoke blk_mq_exit_sched no matter whether have .exit_sched
percpu_ref: don't refer to ref->data if it isn't allocated
block: ratelimit handle_bad_sector() message
blk-throttle: Re-use the throtl_set_slice_end()
blk-throttle: Open code __throtl_de/enqueue_tg()
blk-throttle: Move service tree validation out of the throtl_rb_first()
blk-throttle: Move the list operation after list validation
blk-throttle: Fix IO hang for a corner case
blk-throttle: Avoid tracking latency if low limit is invalid
blk-throttle: Avoid getting the current time if tg->last_finish_time is 0
blk-throttle: Remove a meaningless parameter for throtl_downgrade_state()
block: Remove redundant 'return' statement
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Turn binding into a normal dev_t as the struct block device doesn't
buy us anything and use blkdev_open_by_dev to actually open it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The raw driver has been replaced by O_DIRECT support on the block device
in 2002. Deprecate it to prepare for removal in a few kernel releases.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Allow DRBG testing through user-space af_alg
- Add tcrypt speed testing support for keyed hashes
- Add type-safe init/exit hooks for ahash
Algorithms:
- Mark arc4 as obsolete and pending for future removal
- Mark anubis, khazad, sead and tea as obsolete
- Improve boot-time xor benchmark
- Add OSCCA SM2 asymmetric cipher algorithm and use it for integrity
Drivers:
- Fixes and enhancement for XTS in caam
- Add support for XIP8001B hwrng in xiphera-trng
- Add RNG and hash support in sun8i-ce/sun8i-ss
- Allow imx-rngc to be used by kernel entropy pool
- Use crypto engine in omap-sham
- Add support for Ingenic X1830 with ingenic"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (205 commits)
X.509: Fix modular build of public_key_sm2
crypto: xor - Remove unused variable count in do_xor_speed
X.509: fix error return value on the failed path
crypto: bcm - Verify GCM/CCM key length in setkey
crypto: qat - drop input parameter from adf_enable_aer()
crypto: qat - fix function parameters descriptions
crypto: atmel-tdes - use semicolons rather than commas to separate statements
crypto: drivers - use semicolons rather than commas to separate statements
hwrng: mxc-rnga - use semicolons rather than commas to separate statements
hwrng: iproc-rng200 - use semicolons rather than commas to separate statements
hwrng: stm32 - use semicolons rather than commas to separate statements
crypto: xor - use ktime for template benchmarking
crypto: xor - defer load time benchmark to a later time
crypto: hisilicon/zip - fix the uninitalized 'curr_qm_qp_num'
crypto: hisilicon/zip - fix the return value when device is busy
crypto: hisilicon/zip - fix zero length input in GZIP decompress
crypto: hisilicon/zip - fix the uncleared debug registers
lib/mpi: Fix unused variable warnings
crypto: x86/poly1305 - Remove assignments with no effect
hwrng: npcm - modify readl to readb
...
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Replace commas with semicolons. What is done is essentially described by
the following Coccinelle semantic patch (http://coccinelle.lip6.fr/):
// <smpl>
@@ expression e1,e2; @@
e1
-,
+;
e2
... when any
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Replace commas with semicolons. What is done is essentially described by
the following Coccinelle semantic patch (http://coccinelle.lip6.fr/):
// <smpl>
@@ expression e1,e2; @@
e1
-,
+;
e2
... when any
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Replace commas with semicolons. What is done is essentially described by
the following Coccinelle semantic patch (http://coccinelle.lip6.fr/):
// <smpl>
@@ expression e1,e2; @@
e1
-,
+;
e2
... when any
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Modify the read size to the correct HW random
registers size, 8bit.
The incorrect read size caused and faulty
HW random value.
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Add X1830 SoC digital true random number generator driver.
Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com>
Co-developed-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 漆鹏振 (Qi Pengzhen) <aric.pzqi@ingenic.com>
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Xiphera XIP8001B is an FPGA-based True Random Number Generator
Intellectual Property (IP) Core which can be instantiated in
multiple FPGA families. This driver adds Linux support for it through
the hwrng interface.
Signed-off-by: Atte Tommiska <atte.tommiska@xiphera.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The RNGB can generate 2^20 words (1 word == 4 byte) of 'random' data
after the seed pool was initialized. The pool needs to be reseeded if
more words are required. The reseeding is done automatically since
commit 3acd9ea9331c ("hwrng: imx-rngc - use automatic seeding").
We can't retrieve the TRNG values directly so we need a other way to get
the quality level. We know that the PRNG uses 20.000 entropy samples
from the TRNG to generate 2^20 words (1MiB) and the quality level is
defined as (in bits of entropy per 1024 bits of input). So the quality
level can be calculated by:
20.000 * 1024
------------- = ~ 19.5
2^20
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and also it prints the error value.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Hadar Gat <hadar.gat@arm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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clang static analysis reports this problem
intel-rng.c:333:2: warning: Assigned value is garbage or undefined
void __iomem *mem = mem;
^~~~~~~~~~~~~~~~~ ~~~
Because mem is assigned before it is used, this is not
a real problem. But the initialization is strange and not
needed, so remove it.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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The current code waits for data to be available before attempting a
second read. However the second read would not be executed as the
while loop will exit.
This fix does not wait if all data has been read (skips the call to
msleep(0)) and reads a second time if partial data was retrieved on
the first read.
Worth noticing that since msleep(0) schedules a one jiffy timeout is
better to skip such a call.
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Data rates of MAX_UINT32 will schedule an unnecessary one jiffy
timeout on the call to msleep. Avoid this scenario by using 0 as the
unlimited data rate.
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Some TIS based TPMs can return 0xff to status reads if the locality
hasn't been properly requested. Detect this condition by checking the
bits that the TIS spec specifies must return zero are clear and return
zero in that case. Also drop a warning so the problem can be
identified in the calling path and fixed (usually a missing
try_get_ops()).
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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Use %*ph format to print small buffer as hex string.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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When fitted, the SynQuacer platform exposes its SPI TPM via a MMIO
window that is backed by the SPI command sequencer in the SPI bus
controller. This arrangement has the limitation that only byte size
accesses are supported, and so we'll need to provide a separate module
that take this into account.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
- fix regression in af_alg that affects iwd
- restore polling delay in qat
- fix double free in ingenic on error path
- fix potential build failure in sa2ul due to missing Kconfig dependency
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: af_alg - Work around empty control messages without MSG_MORE
crypto: sa2ul - add Kconfig selects to fix build error
crypto: ingenic - Drop kfree for memory allocated with devm_kzalloc
crypto: qat - add delay before polling mailbox
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It's not necessary to free memory allocated with devm_kzalloc
and using kfree leads to a double free.
Fixes: 190873a0ea45 ("crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.
[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
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Pull IPMI updates from Corey Minyard:
"Minor cleanups to the IPMI driver for 5.9
Nothing of any major consequence. Duplicate code, some missing \n's in
sysfs files, some documentation and comment changes"
* tag 'for-linus-5.9-1' of git://github.com/cminyard/linux-ipmi:
ipmi/watchdog: add missing newlines when printing parameters by sysfs
ipmi: remve duplicate code in __ipmi_bmc_register()
ipmi: ssif: Remove finished TODO comment about SMBus alert
Doc: driver-api: ipmi: Add description of alerts_broken module param
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When I cat some ipmi_watchdog parameters by sysfs, it displays as
follows. It's better to add a newline for easy reading.
root@(none):/# cat /sys/module/ipmi_watchdog/parameters/action
resetroot@(none):/# cat /sys/module/ipmi_watchdog/parameters/preaction
pre_noneroot@(none):/# cat /sys/module/ipmi_watchdog/parameters/preop
preop_noneroot@(none):/#
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Message-Id: <1595313309-43881-1-git-send-email-wangxiongfeng2@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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__ipmi_bmc_register() jumps to the label 'out_free_my_dev_name' in an
error path. So we can remove duplicate code in the if (rv).
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Message-Id: <20200720080838.148737-1-jingxiangfeng@huawei.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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commit 9162052173d2 ("ipmi: Add alert handling to SSIF") introduces
support of SMBus alert. So, just remove TODO comment in order not to
confuse future readers.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Message-Id: <20200624065405.17653-2-misono.tomohiro@jp.fujitsu.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
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Pull drm updates from Dave Airlie:
"New xilinx displayport driver, AMD support for two new GPUs (more
header files), i915 initial support for RocketLake and some work on
their DG1 (discrete chip).
The core also grew some lockdep annotations to try and constrain what
drivers do with dma-fences, and added some documentation on why the
idea of indefinite fences doesn't work.
The long list is below.
I do have some fixes trees outstanding, but I'll follow up with those
later.
core:
- add user def flag to cmd line modes
- dma_fence_wait added might_sleep
- dma-fence lockdep annotations
- indefinite fences are bad documentation
- gem CMA functions used in more drivers
- struct mutex removal
- more drm_ debug macro usage
- set/drop master api fixes
- fix for drm/mm hole size comparison
- drm/mm remove invalid entry optimization
- optimise drm/mm hole handling
- VRR debugfs added
- uncompressed AFBC modifier support
- multiple display id blocks in EDID
- multiple driver sg handling fixes
- __drm_atomic_helper_crtc_reset in all drivers
- managed vram helpers
ttm:
- ttm_mem_reg handling cleanup
- remove bo offset field
- drop CMA memtype flag
- drop mappable flag
xilinx:
- New Xilinx ZynqMP DisplayPort Subsystem driver
nouveau:
- add CRC support
- start using NVIDIA published class header files
- convert all push buffer emission to new macros
- Proper push buffer space management for EVO/NVD channels.
- firmware loading fixes
- 2MiB system memory pages support on Pascal and newer
vkms:
- larger cursor support
i915:
- Rocketlake platform enablement
- Early DG1 enablement
- Numerous GEM refactorings
- DP MST fixes
- FBC, PSR, Cursor, Color, Gamma fixes
- TGL, RKL, EHL workaround updates
- TGL 8K display support fixes
- SDVO/HDMI/DVI fixes
amdgpu:
- Initial support for Sienna Cichlid GPU
- Initial support for Navy Flounder GPU
- SI UVD/VCE support
- expose rotation property
- Add support for unique id on Arcturus
- Enable runtime PM on vega10 boards that support BACO
- Skip BAR resizing if the bios already did id
- Major swSMU code cleanup
- Fixes for DCN bandwidth calculations
amdkfd:
- Track SDMA usage per process
- SMI events interface
radeon:
- Default to on chip GART for AGP boards on all arches
- Runtime PM reference count fixes
msm:
- headers regenerated causing churn
- a650/a640 display and GPU enablement
- dpu dither support for 6bpc panels
- dpu cursor fix
- dsi/mdp5 enablement for sdm630/sdm636/sdm66
tegra:
- video capture prep support
- reflection support
mediatek:
- convert mtk_dsi to bridge API
meson:
- FBC support
sun4i:
- iommu support
rockchip:
- register locking fix
- per-pixel alpha support PX30 VOP
mgag200:
- ported to simple and shmem helpers
- device init cleanups
- use managed pci functions
- dropped hw cursor support
ast:
- use managed pci functions
- use managed VRAM helpers
- rework cursor support
malidp:
- dev_groups support
hibmc:
- refactor hibmc_drv_vdac:
vc4:
- create TXP CRTC
imx:
- error path fixes and cleanups
etnaviv:
- clock handling and error handling cleanups
- use pin_user_pages"
* tag 'drm-next-2020-08-06' of git://anongit.freedesktop.org/drm/drm: (1747 commits)
drm/msm: use kthread_create_worker instead of kthread_run
drm/msm/mdp5: Add MDP5 configuration for SDM636/660
drm/msm/dsi: Add DSI configuration for SDM660
drm/msm/mdp5: Add MDP5 configuration for SDM630
drm/msm/dsi: Add phy configuration for SDM630/636/660
drm/msm/a6xx: add A640/A650 hwcg
drm/msm/a6xx: hwcg tables in gpulist
drm/msm/dpu: add SM8250 to hw catalog
drm/msm/dpu: add SM8150 to hw catalog
drm/msm/dpu: intf timing path for displayport
drm/msm/dpu: set missing flush bits for INTF_2 and INTF_3
drm/msm/dpu: don't use INTF_INPUT_CTRL feature on sdm845
drm/msm/dpu: move some sspp caps to dpu_caps
drm/msm/dpu: update UBWC config for sm8150 and sm8250
drm/msm/dpu: use right setup_blend_config for sm8150 and sm8250
drm/msm/a6xx: set ubwc config for A640 and A650
drm/msm/adreno: un-open-code some packets
drm/msm: sync generated headers
drm/msm/a6xx: add build_bw_table for A640/A650
drm/msm/a6xx: fix crashstate capture for A650
...
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I've got a silent conflict + two trees based on fixes to merge.
Fixes a silent merge with amdgpu
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Catch up with upstream, in particular to get c1e8d7c6a7a6 ("mmap locking
API: convert mmap_sem comments").
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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In intel_gtt_setup_scratch_page(), pointer "page" is not released if
pci_dma_mapping_error() return an error, leading to a memory leak on
module initialisation failure. Simply fix this issue by freeing "page"
before return.
Fixes: 0e87d2b06cb46 ("intel-gtt: initialize our own scratch page")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200522083451.7448-1-chris@chris-wilson.co.uk
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the large set of char and misc and other driver subsystem
patches for 5.9-rc1. Lots of new driver submissions in here, and
cleanups and features for existing drivers.
Highlights are:
- habanalabs driver updates
- coresight driver updates
- nvmem driver updates
- huge number of "W=1" build warning cleanups from Lee Jones
- dyndbg updates
- virtbox driver fixes and updates
- soundwire driver updates
- mei driver updates
- phy driver updates
- fpga driver updates
- lots of smaller individual misc/char driver cleanups and fixes
Full details are in the shortlog.
All of these have been in linux-next with no reported issues"
* tag 'char-misc-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (322 commits)
habanalabs: remove unused but set variable 'ctx_asid'
nvmem: qcom-spmi-sdam: Enable multiple devices
dt-bindings: nvmem: SID: add binding for A100's SID controller
nvmem: update Kconfig description
nvmem: qfprom: Add fuse blowing support
dt-bindings: nvmem: Add properties needed for blowing fuses
dt-bindings: nvmem: qfprom: Convert to yaml
nvmem: qfprom: use NVMEM_DEVID_AUTO for multiple instances
nvmem: core: add support to auto devid
nvmem: core: Add nvmem_cell_read_u8()
nvmem: core: Grammar fixes for help text
nvmem: sc27xx: add sc2730 efuse support
nvmem: Enforce nvmem stride in the sysfs interface
MAINTAINERS: Add git tree for NVMEM FRAMEWORK
nvmem: sprd: Fix return value of sprd_efuse_probe()
drivers: android: Fix the SPDX comment style
drivers: android: Fix a variable declaration coding style issue
drivers: android: Remove braces for a single statement if-else block
drivers: android: Remove the use of else after return
drivers: android: Fix a variable declaration coding style issue
...
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