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* ext4: Support for synchronous DAX faultsJan Kara2017-11-034-1/+47
| | | | | | | | | | | | | | | | | We return IOMAP_F_DIRTY flag from ext4_iomap_begin() when asked to prepare blocks for writing and the inode has some uncommitted metadata changes. In the fault handler ext4_dax_fault() we then detect this case (through VM_FAULT_NEEDDSYNC return value) and call helper dax_finish_sync_fault() to flush metadata changes and insert page table entry. Note that this will also dirty corresponding radix tree entry which is what we want - fsync(2) will still provide data integrity guarantees for applications not using userspace flushing. And applications using userspace flushing can avoid calling fsync(2) and thus avoid the performance overhead. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* ext4: Simplify error handling in ext4_dax_huge_fault()Jan Kara2017-11-031-6/+7
| | | | | | | | | If transaction starting fails, just bail out of the function immediately instead of checking for that condition throughout the function. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Implement dax_finish_sync_fault()Jan Kara2017-11-033-0/+87
| | | | | | | | | | | Implement a function that filesystems can call to finish handling of synchronous page faults. It takes care of syncing appropriare file range and insertion of page table entry. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax, iomap: Add support for synchronous faultsJan Kara2017-11-033-3/+47
| | | | | | | | | | | | | | | Add a flag to iomap interface informing the caller that inode needs fdstasync(2) for returned extent to become persistent and use it in DAX fault code so that we don't map such extents into page tables immediately. Instead we propagate the information that fdatasync(2) is necessary from dax_iomap_fault() with a new VM_FAULT_NEEDDSYNC flag. Filesystem fault handler is then responsible for calling fdatasync(2) and inserting pfn into page tables. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* mm: Define MAP_SYNC and VM_SYNC flagsJan Kara2017-11-034-2/+9
| | | | | | | | | | | | Define new MAP_SYNC flag and corresponding VMA VM_SYNC flag. As the MAP_SYNC flag is not part of LEGACY_MAP_MASK, currently it will be refused by all MAP_SHARED_VALIDATE map attempts and silently ignored for everything else. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Allow tuning whether dax_insert_mapping_entry() dirties entryJan Kara2017-11-031-7/+7
| | | | | | | | | | | | | Currently we dirty radix tree entry whenever dax_insert_mapping_entry() gets called for a write fault. With synchronous page faults we would like to insert clean radix tree entry and dirty it only once we call fdatasync() and update page tables to save some unnecessary cache flushing. Add 'dirty' argument to dax_insert_mapping_entry() for that. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Allow dax_iomap_fault() to return pfnJan Kara2017-11-035-11/+12
| | | | | | | | | | | For synchronous page fault dax_iomap_fault() will need to return PFN which will then need to be inserted into page tables after fsync() completes. Add necessary parameter to dax_iomap_fault(). Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Fix comment describing dax_iomap_fault()Jan Kara2017-11-031-1/+2
| | | | | | | | | Add missing argument description. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Inline dax_pmd_insert_mapping() into the callsiteJan Kara2017-11-032-29/+19
| | | | | | | | | | | dax_pmd_insert_mapping() has only one callsite and we will need to further fine tune what it does for synchronous faults. Just inline it into the callsite so that we don't have to pass awkward bools around. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Inline dax_insert_mapping() into the callsiteJan Kara2017-11-031-27/+19
| | | | | | | | | | | dax_insert_mapping() has only one callsite and we will need to further fine tune what it does for synchronous faults. Just inline it into the callsite so that we don't have to pass awkward bools around. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Create local variable for vmf->flags & FAULT_FLAG_WRITE testJan Kara2017-11-031-2/+3
| | | | | | | | | There are already two users and more are coming. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Create local variable for VMA in dax_iomap_pte_fault()Jan Kara2017-11-031-2/+3
| | | | | | | | | There are already two users and more are coming. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Factor out getting of pfn out of iomapJan Kara2017-11-031-40/+43
| | | | | | | | | | Factor out code to get pfn out of iomap that is shared between PTE and PMD fault path. Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* dax: Simplify arguments of dax_insert_mapping()Jan Kara2017-11-031-16/+16
| | | | | | | | | | | dax_insert_mapping() has lots of arguments and a lot of them is actuall duplicated by passing vm_fault structure as well. Change the function to take the same arguments as dax_pmd_insert_mapping(). Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* mm: Remove VM_FAULT_HWPOISON_LARGE_MASKJan Kara2017-11-031-2/+0
| | | | | | | | | It is unused. Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* mm: introduce MAP_SHARED_VALIDATE, a mechanism to safely define new mmap flagsDan Williams2017-11-039-0/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mmap(2) syscall suffers from the ABI anti-pattern of not validating unknown flags. However, proposals like MAP_SYNC need a mechanism to define new behavior that is known to fail on older kernels without the support. Define a new MAP_SHARED_VALIDATE flag pattern that is guaranteed to fail on all legacy mmap implementations. It is worth noting that the original proposal was for a standalone MAP_VALIDATE flag. However, when that could not be supported by all archs Linus observed: I see why you *think* you want a bitmap. You think you want a bitmap because you want to make MAP_VALIDATE be part of MAP_SYNC etc, so that people can do ret = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_SYNC, fd, 0); and "know" that MAP_SYNC actually takes. And I'm saying that whole wish is bogus. You're fundamentally depending on special semantics, just make it explicit. It's already not portable, so don't try to make it so. Rename that MAP_VALIDATE as MAP_SHARED_VALIDATE, make it have a value of 0x3, and make people do ret = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED_VALIDATE | MAP_SYNC, fd, 0); and then the kernel side is easier too (none of that random garbage playing games with looking at the "MAP_VALIDATE bit", but just another case statement in that map type thing. Boom. Done. Similar to ->fallocate() we also want the ability to validate the support for new flags on a per ->mmap() 'struct file_operations' instance basis. Towards that end arrange for flags to be generically validated against a mmap_supported_flags exported by 'struct file_operations'. By default all existing flags are implicitly supported, but new flags require MAP_SHARED_VALIDATE and per-instance-opt-in. Cc: Jan Kara <jack@suse.cz> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Suggested-by: Christoph Hellwig <hch@lst.de> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* mm: Handle 0 flags in _calc_vm_trans() macroJan Kara2017-11-031-1/+2
| | | | | | | | | | | _calc_vm_trans() does not handle the situation when some of the passed flags are 0 (which can happen if these VM flags do not make sense for the architecture). Improve the _calc_vm_trans() macro to return 0 in such situation. Since all passed flags are constant, this does not add any runtime overhead. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* Linux 4.14-rc4v4.14-rc4Linus Torvalds2017-10-091-1/+1
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* Merge tag 'scsi-fixes' of ↵Linus Torvalds2017-10-078-31/+36
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: - a couple of serious fixes: use after free and blacklist for WRITE SAME - one error leg fix: write_pending failure - one user experience problem: do not override max_sectors_kb - one minor unused function removal * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: ibmvscsis: Fix write_pending failure path scsi: libiscsi: Remove iscsi_destroy_session scsi: libiscsi: Fix use-after-free race during iscsi_session_teardown scsi: sd: Do not override max_sectors_kb sysfs setting scsi: sd: Implement blacklist option for WRITE SAME w/ UNMAP
| * scsi: ibmvscsis: Fix write_pending failure pathBryant G. Ly2017-10-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | For write_pending if the queue is down or client failed then return -EIO so that LIO can properly process the completed command. Prior we returned 0 since LIO could not handle it properly. Now with commit fa7e25cf13a6 ("target: Fix unknown fabric callback queue-full errors") that patch addresses LIO's ability to handle things right. Signed-off-by: Bryant G. Ly <bgly@us.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: libiscsi: Remove iscsi_destroy_sessionKhazhismel Kumykov2017-10-032-17/+0
| | | | | | | | | | | | | | | | | | iscsi_session_teardown was the only user of this function. Function currently is just short for iscsi_remove_session + iscsi_free_session. Signed-off-by: Khazhismel Kumykov <khazhy@google.com> Acked-by: Chris Leech <cleech@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: libiscsi: Fix use-after-free race during iscsi_session_teardownKhazhismel Kumykov2017-10-031-4/+4
| | | | | | | | | | | | | | | | | | | | Session attributes exposed through sysfs were freed before the device was destroyed, resulting in a potential use-after-free. Free these attributes after removing the device. Signed-off-by: Khazhismel Kumykov <khazhy@google.com> Acked-by: Chris Leech <cleech@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: sd: Do not override max_sectors_kb sysfs settingMartin K. Petersen2017-10-031-5/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A user may lower the max_sectors_kb setting in sysfs to accommodate certain workloads. Previously we would always set the max I/O size to either the block layer default or the optional preferred I/O size reported by the device. Keep the current heuristics for the initial setting of max_sectors_kb. For subsequent invocations, only update the current queue limit if it exceeds the capabilities of the hardware. Cc: <stable@vger.kernel.org> Reported-by: Don Brace <don.brace@microsemi.com> Reviewed-by: Martin Wilck <mwilck@suse.com> Tested-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| * scsi: sd: Implement blacklist option for WRITE SAME w/ UNMAPMartin K. Petersen2017-10-034-4/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SBC-4 states: "A MAXIMUM UNMAP LBA COUNT field set to a non-zero value indicates the maximum number of LBAs that may be unmapped by an UNMAP command" "A MAXIMUM WRITE SAME LENGTH field set to a non-zero value indicates the maximum number of contiguous logical blocks that the device server allows to be unmapped or written in a single WRITE SAME command." Despite the spec being clear on the topic, some devices incorrectly expect WRITE SAME commands with the UNMAP bit set to be limited to the value reported in MAXIMUM UNMAP LBA COUNT in the Block Limits VPD. Implement a blacklist option that can be used to accommodate devices with this behavior. Cc: <stable@vger.kernel.org> Reported-by: Bill Kuzeja <William.Kuzeja@stratus.com> Reported-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com> Tested-by: Laurence Oberman <loberman@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
* | Merge branch 'i2c/for-current-4.14' of ↵Linus Torvalds2017-10-075-10/+14
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fixes from Wolfram Sang: "I2C has three driver fixes for the newly introduced drivers and one ID addition for the i801 driver" * 'i2c/for-current-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: i2c-stm32f7: make structure stm32f7_setup static const i2c: ensure termination of *_device_id tables i2c: i801: Add support for Intel Cedar Fork i2c: stm32f7: fix setup structure
| * | i2c: i2c-stm32f7: make structure stm32f7_setup static constColin Ian King2017-10-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The structure stm32f7_setup is local to the source and does not need to be in global scope, make it static const. Cleans up sparse warning: symbol 'stm32f7_setup' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| * | i2c: ensure termination of *_device_id tablesThomas Meyer2017-10-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Make sure (of/i2c/platform)_device_id tables are NULL terminated. Found by coccinelle spatch "misc/of_table.cocci" Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| * | i2c: i801: Add support for Intel Cedar ForkJarkko Nikula2017-10-053-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | Add PCI ID for Intel Cedar Fork PCH. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| * | i2c: stm32f7: fix setup structurePierre-Yves MORDRET2017-10-051-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | I2C drive setup structure is not properly allocated. Make it static instead of pointer to store driver data. Fixes: aeb068c5721485 ("i2c: i2c-stm32f7: add driver") Signed-off-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* | | Merge tag 'mmc-v4.14-rc3' of ↵Linus Torvalds2017-10-0711-162/+81
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC fixes from Ulf Hansson: "MMC core: - Fix driver strength selection when selecting hs400es - Delete bounce buffer handling: This change fixes a problem related to how bounce buffers are being allocated. However, instead of trying to fix that, let's just remove the mmc bounce buffer code altogether, as it has practically no use. MMC host: - meson-gx: A couple of fixes related to clock/phase/tuning - sdhci-xenon: Fix clock resource by adding an optional bus clock" * tag 'mmc-v4.14-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci-xenon: Fix clock resource by adding an optional bus clock mmc: meson-gx: include tx phase in the tuning process mmc: meson-gx: fix rx phase reset mmc: meson-gx: make sure the clock is rounded down mmc: Delete bounce buffer handling mmc: core: add driver strength selection when selecting hs400es
| * | | mmc: sdhci-xenon: Fix clock resource by adding an optional bus clockGregory CLEMENT2017-10-043-9/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Armada 7K/8K we need to explicitly enable the bus clock. The bus clock is optional because not all the SoCs need them but at least for Armada 7K/8K it is actually mandatory. The binding documentation is updating accordingly. Without this patch the kernel hand during boot if the mvpp2.2 network driver was not present in the kernel. Indeed the clock needed by the xenon controller was set by the network driver. Fixes: 3a3748dba881 ("mmc: sdhci-xenon: Add Marvell Xenon SDHC core functionality)" CC: Stable <stable@vger.kernel.org> Tested-by: Zhoujie Wu <zjwu@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | | mmc: meson-gx: include tx phase in the tuning processJerome Brunet2017-10-041-1/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It has been reported that some platforms (odroid-c2) may require a different tx phase setting to operate at high speed (hs200 and hs400) To improve the situation, this patch includes tx phase in the tuning process. Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function") Reported-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | | mmc: meson-gx: fix rx phase resetJerome Brunet2017-10-041-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Resetting the phase when POWER_ON is set the set_ios() call means that the phase is reset almost every time the set_ios() is called, while the expected behavior was to reset the phase on a power cycle. This had gone unnoticed until now because in all mode (except hs400) the tuning is done after the last to set_ios(). In such case, the tuning result is used anyway. In HS400, there are a few calls to set_ios() after the tuning is done, overwriting the tuning result. Resetting the phase on POWER_UP instead of POWER_ON solve the problem. Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | | mmc: meson-gx: make sure the clock is rounded downJerome Brunet2017-10-041-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using CLK_DIVIDER_ROUND_CLOSEST is unsafe as the mmc clock could be rounded to a rate higher the specified rate. Removing this flag ensure that, if the rate needs to be rounded, it will be rounded down. Fixes: 51c5d8447bd7 ("MMC: meson: initial support for GX platforms") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | | mmc: Delete bounce buffer handlingLinus Walleij2017-10-046-132/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In may, Steven sent a patch deleting the bounce buffer handling and the CONFIG_MMC_BLOCK_BOUNCE option. I chose the less invasive path of making it a runtime config option, and we merged that successfully for kernel v4.12. The code is however just standing in the way and taking up space for seemingly no gain on any systems in wide use today. Pierre says the code was there to improve speed on TI SDHCI controllers on certain HP laptops and possibly some Ricoh controllers as well. Early SDHCI controllers lacked the scatter-gather feature, which made software bounce buffers a significant speed boost. We are clearly talking about the list of SDHCI PCI-based MMC/SD card readers found in the pci_ids[] list in drivers/mmc/host/sdhci-pci-core.c. The TI SDHCI derivative is not supported by the upstream kernel. This leaves the Ricoh. What we can however notice is that the x86 defconfigs in the kernel did not enable CONFIG_MMC_BLOCK_BOUNCE option, which means that any such laptop would have to have a custom configured kernel to actually take advantage of this bounce buffer speed-up. It simply seems like there was a speed optimization for the Ricoh controllers that noone was using. (I have not checked the distro defconfigs but I am pretty sure the situation is the same there.) Bounce buffers increased performance on the OMAP HSMMC at one point, and was part of the original submission in commit a45c6cb81647 ("[ARM] 5369/1: omap mmc: Add new omap hsmmc controller for 2430 and 34xx, v3") This optimization was removed in commit 0ccd76d4c236 ("omap_hsmmc: Implement scatter-gather emulation") which found that scatter-gather emulation provided even better performance. The same was introduced for SDHCI in commit 2134a922c6e7 ("sdhci: scatter-gather (ADMA) support") I am pretty positively convinced that software scatter-gather emulation will do for any host controller what the bounce buffers were doing. Essentially, the bounce buffer was a reimplementation of software scatter-gather-emulation in the MMC subsystem, and it should be done away with. Cc: Pierre Ossman <pierre@ossman.eu> Cc: Juha Yrjola <juha.yrjola@solidboot.com> Cc: Steven J. Hill <Steven.Hill@cavium.com> Cc: Shawn Lin <shawn.lin@rock-chips.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Suggested-by: Steven J. Hill <Steven.Hill@cavium.com> Suggested-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| * | | mmc: core: add driver strength selection when selecting hs400esChanho Min2017-10-021-17/+19
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver strength selection is missed and required when selecting hs400es. So, It is added here. Fixes: 81ac2af65793ecf ("mmc: core: implement enhanced strobe support") Cc: stable@vger.kernel.org Signed-off-by: Hankyung Yu <hankyung.yu@lge.com> Signed-off-by: Chanho Min <chanho.min@lge.com> Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
* | | Merge tag 'hwmon-for-linus-v4.14-rc4' of ↵Linus Torvalds2017-10-071-8/+11
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging Pull hwmon fix from Guenter Roeck: "Fix up error path in xgene driver" * tag 'hwmon-for-linus-v4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (xgene) Fix up error handling path mixup in 'xgene_hwmon_probe()'
| * | | hwmon: (xgene) Fix up error handling path mixup in 'xgene_hwmon_probe()'Christophe Jaillet2017-10-011-8/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 2ca492e22cb7 has moved the call to 'kfifo_alloc()' from after the main 'if' statement to before it. But it has not updated the error handling paths accordingly. Fix all that: - if 'kfifo_alloc()' fails we can return directly - direct returns after 'kfifo_alloc()' must now go to 'out_mbox_free' - 'goto out_mbox_free' must be replaced by 'goto out', otherwise the '[pcc_]mbox_free_channel()' call will be missed. Fixes: 2ca492e22cb7 ("hwmon: (xgene) Fix crash when alarm occurs before driver probe") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
* | | | Merge tag 'clk-fixes-for-linus' of ↵Linus Torvalds2017-10-073-5/+23
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk fixes from Stephen Boyd: - build fix to export the clk_bulk_prepare() symbol - suspend fix for Samsung Exynos SoCs where we need to keep clks on across suspend - two critical clk markings for clks that shouldn't ever turn off on Rockchip SoCs - a fix for a copy-paste mistake on Rockchip rk3128 causing some clks to touch the same bit and trample over one another * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: clk: samsung: exynos4: Enable VPLL and EPLL clocks for suspend/resume cycle clk: Export clk_bulk_prepare() clk: rockchip: add sclk_timer5 as critical clock on rk3128 clk: rockchip: fix up rk3128 pvtm and mipi_24m gate regs error clk: rockchip: add pclk_pmu as critical clock on rk3128
| * | | | clk: samsung: exynos4: Enable VPLL and EPLL clocks for suspend/resume cycleMarek Szyprowski2017-10-041-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 6edfa11cb396 ("clk: samsung: Add enable/disable operation for PLL36XX clocks") added enable/disable operations to PLL clocks. Prior that VPLL and EPPL clocks were always enabled because the enable bit was never touched. Those clocks have to be enabled during suspend/resume cycle, because otherwise board fails to enter sleep mode. This patch enables them unconditionally before entering system suspend state. System restore function will set them to the previous state saved in the register cache done before that unconditional enable. Fixes: 6edfa11cb396 ("clk: samsung: Add enable/disable operation for PLL36XX clocks") CC: stable@vger.kernel.org # v4.13 Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
| * | | | Merge tag 'v4.14-rockchip-clkfixes-1' of ↵Stephen Boyd2017-09-291-5/+7
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into clk-fixes Pull Rockchip clk driver fixes from Heiko Stuebner: Some smallish fixes for the rk3128 clock support including some register errors and some clocks that should be critical for safe usage. * tag 'v4.14-rockchip-clkfixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip: clk: rockchip: add sclk_timer5 as critical clock on rk3128 clk: rockchip: fix up rk3128 pvtm and mipi_24m gate regs error clk: rockchip: add pclk_pmu as critical clock on rk3128
| | * | | | clk: rockchip: add sclk_timer5 as critical clock on rk3128Elaine Zhang2017-09-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | sclk_timer5 is for arm arch counter, so need always on. but no dts node to handle this clk, so make it as critical clock Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| | * | | | clk: rockchip: fix up rk3128 pvtm and mipi_24m gate regs errorElaine Zhang2017-09-171-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A copy-paste error made them use the wrong bits in the register. Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| | * | | | clk: rockchip: add pclk_pmu as critical clock on rk3128Elaine Zhang2017-09-171-1/+2
| | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pclk_pmu need always on, and no dts node to handle this clk, so make it as critical clock Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
| * / / / clk: Export clk_bulk_prepare()Bjorn Andersson2017-09-291-0/+1
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow clk_bulk_prepare() to be referenced by kernel modules by adding the missing EXPORT_SYMBOL_GPL(). Fixes: 266e4e9d9150 ("clk: add clk_bulk_get accessories") Reported-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* | | | Merge tag 'arc-4.14-rc4' of ↵Linus Torvalds2017-10-0717-28/+130
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC udpates from Vineet Gupta: - updates for various platforms - boot log updates for upcoming HS48 family of cores (dual issue) * tag 'arc-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset ARC: [plat-hsdk]: Temporary fix to set CPU frequency to 1GHz ARC: fix allnoconfig build warning ARCv2: boot log: identify HS48 cores (dual issue) ARC: boot log: decontaminate ARCv2 ISA_CONFIG register arc: remove redundant UTS_MACHINE define in arch/arc/Makefile ARC: [plat-eznps] Update platform maintainer as Noam left ARC: [plat-hsdk] use actual clk driver to manage cpu clk ARC: [*defconfig] Reenable soft lock-up detector ARC: [plat-axs10x] sdio: Temporary fix of sdio ciu frequency ARC: [plat-hsdk] sdio: Temporary fix of sdio ciu frequency ARC: [plat-axs103] Add temporary quirk to reset ethernet IP
| * | | | ARC: [plat-hsdk]: Add reset controller node to manage ethernet resetEugeniy Paltsev2017-10-062-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DW ethernet controller on HSDK hangs sometimes after SW reset, so add reset node to make possible to reset DW ethernet controller HW. Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| * | | | ARC: [plat-hsdk]: Temporary fix to set CPU frequency to 1GHzEugeniy Paltsev2017-10-041-0/+42
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add temporary fix to HSDK platform code to setup CPU frequency to 1GHz on early boot. We can remove this fix when smart hsdk pll driver will be introduced, see discussion: https://www.mail-archive.com/linux-snps-arc@lists.infradead.org/msg02689.html Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| * | | | ARC: fix allnoconfig build warningVineet Gupta2017-10-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | Reported-by: Dmitrii Kolesnichenko <dmitrii@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
| * | | | ARCv2: boot log: identify HS48 cores (dual issue)Vineet Gupta2017-10-042-4/+16
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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