- 10 Feb, 2017 10 commits
-
-
Wei Yongjun authored
module_w1_family() makes the code simpler by eliminating boilerplate code. Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Acked-by:
Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
Wei Yongjun authored
Use kmemdup rather than duplicating its implementation. Generated by: scripts/coccinelle/api/memdup.cocci Signed-off-by:
-
Jason Gunthorpe authored
This allows the driver to avoid a high order coherent DMA allocation and memory copy. With this patch it can DMA directly from the kernel pages that the bitfile is stored in. Since this is now a gather DMA operation the driver uses the ISR to feed the chips DMA queue with each entry from the SGL. Signed-off-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Acked-by:
Moritz Fischer <moritz.fischer@ettus.com> Signed-off-by:
-
Jason Gunthorpe authored
Requiring contiguous kernel memory is not a good idea, this is a limited resource and allocation can fail under normal work loads. This introduces a .write_sg op that supporting drivers can provide to DMA directly from dis-contiguous memory and a new entry point fpga_mgr_buf_load_sg that users can call to directly provide page lists. The full matrix of compatibility is provided, either the linear or sg interface can be used by the user with a driver supporting either interface. A notable change for drivers is that the .write op can now be called multiple times. Signed-off-by:
Alan Tull <atull@opensource.altera.com> Acked-by:
-
Jason Gunthorpe authored
There is no sense in sending a bitstream we know will not work, and with the variety of options for bitstream generation in Xilinx tools it is not terribly clear what the correct input should be. This is particularly important for Zynq since auto-correction was removed from the driver and the Zynq hardware only accepts a bitstream format that is different from what the Xilinx tools typically produce. Worse, the hardware provides no indication why the bitstream fails, it simply times out if the input is wrong. The best option here is to have the kernel print a message informing the user they are using a malformed bistream and programming failure isn't for any of the myriad of other reasons. Signed-off-by:
-
Jason Gunthorpe authored
The completion did not check the interrupt status to see if any error bits were asserted, check error bits and dump some registers if things went wrong. A few fixes are needed to make this work, the IXR_ERROR_FLAGS_MASK was wrong, it included the done bits, which shows a bug in mask/unmask_irqs which were using the wrong bits, simplify all of this stuff. Signed-off-by:
-
Alexander Usyskin authored
Parallel reads from multiple threads on a file descriptor are not well defined and racy. It is safer to return to original behavior and simply fail the additional read. The solution is to remove request for next read credit. Cc: <stable@vger.kernel.org> #4.9 Fixes: ff1586a7 ("mei: enqueue consecutive reads") Signed-off-by:
Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by:
Tomas Winkler <tomas.winkler@intel.com> Signed-off-by:
-
Jeremy Kerr authored
Driver bind to devices based on the engine types & (optional) versions. Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
Chris Bostic <cbostic@us.ibm.com> Signed-off-by:
-
Jeremy Kerr authored
Add structs for fsi devices & drivers, and struct device conversion functions. Signed-off-by:
-
Jeremy Kerr authored
This change adds the initial (empty) fsi bus definition, and introduces drivers/fsi/. Signed-off-by:
-
- 06 Feb, 2017 1 commit
-
-
Greg Kroah-Hartman authored
We want the hv and other fixes in here as well to handle merge and testing issues. Signed-off-by:
-
- 05 Feb, 2017 1 commit
-
-
Linus Torvalds authored
-
- 04 Feb, 2017 6 commits
-
-
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fixes from Thomas Gleixner: - Prevent double activation of interrupt lines, which causes problems on certain interrupt controllers - Handle the fallout of the above because x86 (ab)uses the activation function to reconfigure interrupts under the hood. * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Make irq activate operations symmetric irqdomain: Avoid activating interrupts more than once
-
git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fix from Radim Krčmář: "Fix a regression that prevented migration between hosts with different XSAVE features even if the missing features were not used by the guest (for stable)" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: do not save guest-unsupported XSAVE state
-
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc driver fixes from Greg KH: "Here are two bugfixes that resolve some reported issues. One in the firmware loader, that should fix the much-reported problem of crashes with it. The other is a hyperv fix for a reported regression. Both have been in linux-next for a week or so with no reported issues" * tag 'char-misc-4.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read() firmware: fix NULL pointer dereference in __fw_load_abort()
-
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pull staging/IIO fixes from Greg KH: "Here are a few small IIO and one staging driver fix for 4.10-rc7. They fix some reported issues with the drivers. All of them have been in linux-next for a week or so with no reported issues" * tag 'staging-4.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: greybus: timesync: validate platform state callback iio: dht11: Use usleep_range instead of msleep for start signal iio: adc: palmas_gpadc: retrieve a valid iio_dev in suspend/resume iio: health: max30100: fixed parenthesis around FIFO count check iio: health: afe4404: retrieve a valid iio_dev in suspend/resume iio: health: afe4403: retrieve a valid iio_dev in suspend/resume
-
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB fixes from Greg KH: "Here are some small USB fixes for some reported issues, and the usual number of new device ids for 4.10-rc7. All of these, except the last new device id, have been in linux-next for a while with no reported issues" * tag 'usb-4.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: USB: serial: pl2303: add ATEN device ID usb: gadget: f_fs: Assorted buffer overflow checks. USB: Add quirk for WORLDE easykey.25 MIDI keyboard usb: musb: Fix external abort on non-linefetch for musb_irq_work() usb: musb: Fix host mode error -71 regression USB: serial: option: add device ID for HP lt2523 (Novatel E371) USB: serial: qcserial: add Dell DW5570 QDL
-
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fix from James Bottomley: "A single fix this time: a fix for a virtqueue removal bug which only appears to affect S390, but which results in the queue hanging forever thus causing the machine to fail shutdown" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: virtio_scsi: Reject commands when virtqueue is broken
-
- 03 Feb, 2017 22 commits
-
-
git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds authored
Pull virtio/vhost fixes from Michael S. Tsirkin: "Last minute fixes: - ARM DMA fix revert - vhost endian-ness fix - MAINTAINERS: email address change for Amit" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: MAINTAINERS: update email address for Amit Shah vhost: fix initialization for vq->is_le Revert "vring: Force use of DMA API for ARM-based systems with legacy devices"
-
git://github.com/awilliam/linux-vfioLinus Torvalds authored
Pull VFIO fix from Alex Williamson: "Fix an error path in SPAPR IOMMU backend (Alexey Kardashevskiy)" * tag 'vfio-v4.10-rc7' of git://github.com/awilliam/linux-vfio: vfio/spapr: Fix missing mutex unlock when creating a window
-
Linus Torvalds authored
Merge fixes from Andrew Morton: "8 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm, fs: check for fatal signals in do_generic_file_read() fs: break out of iomap_file_buffered_write on fatal signals base/memory, hotplug: fix a kernel oops in show_valid_zones() mm/memory_hotplug.c: check start_pfn in test_pages_in_a_zone() jump label: pass kbuild_cflags when checking for asm goto support shmem: fix sleeping from atomic context kasan: respect /proc/sys/kernel/traceoff_on_warning zswap: disable changing params if init fails
-
Michal Hocko authored
do_generic_file_read() can be told to perform a large request from userspace. If the system is under OOM and the reading task is the OOM victim then it has an access to memory reserves and finishing the full request can lead to the full memory depletion which is dangerous. Make sure we rather go with a short read and allow the killed task to terminate. Link: http://lkml.kernel.org/r/20170201092706.9966-3-mhocko@kernel.orgSigned-off-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
-
Michal Hocko authored
Tetsuo has noticed that an OOM stress test which performs large write requests can cause the full memory reserves depletion. He has tracked this down to the following path __alloc_pages_nodemask+0x436/0x4d0 alloc_pages_current+0x97/0x1b0 __page_cache_alloc+0x15d/0x1a0 mm/filemap.c:728 pagecache_get_page+0x5a/0x2b0 mm/filemap.c:1331 grab_cache_page_write_begin+0x23/0x40 mm/filemap.c:2773 iomap_write_begin+0x50/0xd0 fs/iomap.c:118 iomap_write_actor+0xb5/0x1a0 fs/iomap.c:190 ? iomap_write_end+0x80/0x80 fs/iomap.c:150 iomap_apply+0xb3/0x130 fs/iomap.c:79 iomap_file_buffered_write+0x68/0xa0 fs/iomap.c:243 ? iomap_write_end+0x80/0x80 xfs_file_buffered_aio_write+0x132/0x390 [xfs] ? remove_wait_queue+0x59/0x60 xfs_file_write_iter+0x90/0x130 [xfs] __vfs_write+0xe5/0x140 vfs_write+0xc7/0x1f0 ? syscall_trace_enter+0x1d0/0x380 SyS_write+0x58/0xc0 do_syscall_64+0x6c/0x200 entry_SYSCALL64_slow_path+0x25/0x25 the oom victim has access to all memory reserves to make a forward progress to exit easier. But iomap_file_buffered_write and other callers of iomap_apply loop to complete the full request. We need to check for fatal signals and back off with a short write instead. As the iomap_apply delegates all the work down to the actor we have to hook into those. All callers that work with the page cache are calling iomap_write_begin so we will check for signals there. dax_iomap_actor has to handle the situation explicitly because it copies data to the userspace directly. Other callers like iomap_page_mkwrite work on a single page or iomap_fiemap_actor do not allocate memory based on the given len. Fixes: 68a9f5e7 ("xfs: implement iomap based buffered write path") Link: http://lkml.kernel.org/r/20170201092706.9966-2-mhocko@kernel.orgSigned-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by:
-
Toshi Kani authored
Reading a sysfs "memoryN/valid_zones" file leads to the following oops when the first page of a range is not backed by struct page. show_valid_zones() assumes that 'start_pfn' is always valid for page_zone(). BUG: unable to handle kernel paging request at ffffea017a000000 IP: show_valid_zones+0x6f/0x160 This issue may happen on x86-64 systems with 64GiB or more memory since their memory block size is bumped up to 2GiB. [1] An example of such systems is desribed below. 0x3240000000 is only aligned by 1GiB and this memory block starts from 0x3200000000, which is not backed by struct page. BIOS-e820: [mem 0x0000003240000000-0x000000603fffffff] usable Since test_pages_in_a_zone() already checks holes, fix this issue by extending this function to return 'valid_start' and 'valid_end' for a given range. show_valid_zones() then proceeds with the valid range. [1] 'Commit bdee237c ("x86: mm: Use 2GB memory block size on large-memory x86-64 systems")' Link: http://lkml.kernel.org/r/20170127222149.30893-3-toshi.kani@hpe.comSigned-off-by:
Toshi Kani <toshi.kani@hpe.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Zhang Zhen <zhenzhang.zhang@huawei.com> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: <stable@vger.kernel.org> [4.4+] Signed-off-by:
-
Toshi Kani authored
Patch series "fix a kernel oops when reading sysfs valid_zones", v2. A sysfs memory file is created for each 2GiB memory block on x86-64 when the system has 64GiB or more memory. [1] When the start address of a memory block is not backed by struct page, i.e. a memory range is not aligned by 2GiB, reading its 'valid_zones' attribute file leads to a kernel oops. This issue was observed on multiple x86-64 systems with more than 64GiB of memory. This patch-set fixes this issue. Patch 1 first fixes an issue in test_pages_in_a_zone(), which does not test the start section. Patch 2 then fixes the kernel oops by extending test_pages_in_a_zone() to return valid [start, end). Note for stable kernels: The memory block size change was made by commit bdee237c ("x86: mm: Use 2GB memory block size on large-memory x86-64 systems"), which was accepted to 3.9. However, this patch-set depends on (and fixes) the change to test_pages_in_a_zone() made by commit 5f0f2887 ("mm/memory_hotplug.c: check for missing sections in test_pages_in_a_zone()"), which was accepted to 4.4. So, I recommend that we backport it up to 4.4. [1] 'Commit bdee237c ("x86: mm: Use 2GB memory block size on large-memory x86-64 systems")' This patch (of 2): test_pages_in_a_zone() does not check 'start_pfn' when it is aligned by section since 'sec_end_pfn' is set equal to 'pfn'. Since this function is called for testing the range of a sysfs memory file, 'start_pfn' is always aligned by section. Fix it by properly setting 'sec_end_pfn' to the next section pfn. Also make sure that this function returns 1 only when the range belongs to a zone. Link: http://lkml.kernel.org/r/20170127222149.30893-2-toshi.kani@hpe.comSigned-off-by:
-
David Lin authored
Some versions of ARM GCC compiler such as Android toolchain throws in a '-fpic' flag by default. This causes the gcc-goto check script to fail although some config would have '-fno-pic' flag in the KBUILD_CFLAGS. This patch passes the KBUILD_CFLAGS to the check script so that the script does not rely on the default config from different compilers. Link: http://lkml.kernel.org/r/20170120234329.78868-1-dtwlin@google.comSigned-off-by:
David Lin <dtwlin@google.com> Acked-by:
Steven Rostedt <rostedt@goodmis.org> Cc: Michal Marek <mmarek@suse.com> Signed-off-by:
-
Kirill A. Shutemov authored
Syzkaller fuzzer managed to trigger this: BUG: sleeping function called from invalid context at mm/shmem.c:852 in_atomic(): 1, irqs_disabled(): 0, pid: 529, name: khugepaged 3 locks held by khugepaged/529: #0: (shrinker_rwsem){++++..}, at: [<ffffffff818d7ef1>] shrink_slab.part.59+0x121/0xd30 mm/vmscan.c:451 #1: (&type->s_umount_key#29){++++..}, at: [<ffffffff81a63630>] trylock_super+0x20/0x100 fs/super.c:392 #2: (&(&sbinfo->shrinklist_lock)->rlock){+.+.-.}, at: [<ffffffff818fd83e>] spin_lock include/linux/spinlock.h:302 [inline] #2: (&(&sbinfo->shrinklist_lock)->rlock){+.+.-.}, at: [<ffffffff818fd83e>] shmem_unused_huge_shrink+0x28e/0x1490 mm/shmem.c:427 CPU: 2 PID: 529 Comm: khugepaged Not tainted 4.10.0-rc5+ #201 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: shmem_undo_range+0xb20/0x2710 mm/shmem.c:852 shmem_truncate_range+0x27/0xa0 mm/shmem.c:939 shmem_evict_inode+0x35f/0xca0 mm/shmem.c:1030 evict+0x46e/0x980 fs/inode.c:553 iput_final fs/inode.c:1515 [inline] iput+0x589/0xb20 fs/inode.c:1542 shmem_unused_huge_shrink+0xbad/0x1490 mm/shmem.c:446 shmem_unused_huge_scan+0x10c/0x170 mm/shmem.c:512 super_cache_scan+0x376/0x450 fs/super.c:106 do_shrink_slab mm/vmscan.c:378 [inline] shrink_slab.part.59+0x543/0xd30 mm/vmscan.c:481 shrink_slab mm/vmscan.c:2592 [inline] shrink_node+0x2c7/0x870 mm/vmscan.c:2592 shrink_zones mm/vmscan.c:2734 [inline] do_try_to_free_pages+0x369/0xc80 mm/vmscan.c:2776 try_to_free_pages+0x3c6/0x900 mm/vmscan.c:2982 __perform_reclaim mm/page_alloc.c:3301 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3322 [inline] __alloc_pages_slowpath+0xa24/0x1c30 mm/page_alloc.c:3683 __alloc_pages_nodemask+0x544/0xae0 mm/page_alloc.c:3848 __alloc_pages include/linux/gfp.h:426 [inline] __alloc_pages_node include/linux/gfp.h:439 [inline] khugepaged_alloc_page+0xc2/0x1b0 mm/khugepaged.c:750 collapse_huge_page+0x182/0x1fe0 mm/khugepaged.c:955 khugepaged_scan_pmd+0xfdf/0x12a0 mm/khugepaged.c:1208 khugepaged_scan_mm_slot mm/khugepaged.c:1727 [inline] khugepaged_do_scan mm/khugepaged.c:1808 [inline] khugepaged+0xe9b/0x1590 mm/khugepaged.c:1853 kthread+0x326/0x3f0 kernel/kthread.c:227 ret_from_fork+0x31/0x40 arch/x86/entry/entry_64.S:430 The iput() from atomic context was a bad idea: if after igrab() somebody else calls iput() and we left with the last inode reference, our iput() would lead to inode eviction and therefore sleeping. This patch should fix the situation. Link: http://lkml.kernel.org/r/20170131093141.GA15899@node.shutemov.nameSigned-off-by:Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by:
Dmitry Vyukov <dvyukov@google.com> Signed-off-by:
-
Peter Zijlstra authored
After much waiting I finally reproduced a KASAN issue, only to find my trace-buffer empty of useful information because it got spooled out :/ Make kasan_report honour the /proc/sys/kernel/traceoff_on_warning interface. Link: http://lkml.kernel.org/r/20170125164106.3514-1-aryabinin@virtuozzo.comSigned-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by:
Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by:
Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
-
Dan Streetman authored
Add zswap_init_failed bool that prevents changing any of the module params, if init_zswap() fails, and set zswap_enabled to false. Change 'enabled' param to a callback, and check zswap_init_failed before allowing any change to 'enabled', 'zpool', or 'compressor' params. Any driver that is built-in to the kernel will not be unloaded if its init function returns error, and its module params remain accessible for users to change via sysfs. Since zswap uses param callbacks, which assume that zswap has been initialized, changing the zswap params after a failed initialization will result in WARNING due to the param callbacks expecting a pool to already exist. This prevents that by immediately exiting any of the param callbacks if initialization failed. This was reported here: https://marc.info/?l=linux-mm&m=147004228125528&w=4 And fixes this WARNING: [ 429.723476] WARNING: CPU: 0 PID: 5140 at mm/zswap.c:503 __zswap_pool_current+0x56/0x60 The warning is just noise, and not serious. However, when init fails, zswap frees all its percpu dstmem pages and its kmem cache. The kmem cache might be serious, if kmem_cache_alloc(NULL, gfp) has problems; but the percpu dstmem pages are definitely a problem, as they're used as temporary buffer for compressed pages before copying into place in the zpool. If the user does get zswap enabled after an init failure, then zswap will likely Oops on the first page it tries to compress (or worse, start corrupting memory). Fixes: 90b0fc26 ("zswap: change zpool/compressor at runtime") Link: http://lkml.kernel.org/r/20170124200259.16191-2-ddstreet@ieee.orgSigned-off-by:
Dan Streetman <dan.streetman@canonical.com> Reported-by:
Marcin Miroslaw <marcin@mejor.pl> Cc: Seth Jennings <sjenning@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Cc: Minchan Kim <minchan@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by:
-
Linus Torvalds authored
Merge tag 'regulator-fix-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fixes from Mark Brown: "Three changes here: two run of the mill driver specific fixes and a change from Mark Rutland which reverts some new device specific ACPI binding code which was added during the merge window as there are concerns about this sending the wrong signal about usage of regulators in ACPI systems" * tag 'regulator-fix-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: fixed: Revert support for ACPI interface regulator: axp20x: AXP806: Fix dcdcb being set instead of dcdce regulator: twl6030: fix range comparison, allowing vsel = 59
-
Amit Shah authored
I'm leaving my job at Red Hat, this email address will stop working next week. Update it to one that I will have access to later. Signed-off-by:
Amit Shah <amit.shah@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
-
Halil Pasic authored
Currently, under certain circumstances vhost_init_is_le does just a part of the initialization job, and depends on vhost_reset_is_le being called too. For this reason vhost_vq_init_access used to call vhost_reset_is_le when vq->private_data is NULL. This is not only counter intuitive, but also real a problem because it breaks vhost_net. The bug was introduced to vhost_net with commit 2751c988 ("vhost: cross-endian support for legacy devices"). The symptom is corruption of the vq's used.idx field (virtio) after VHOST_NET_SET_BACKEND was issued as a part of the vhost shutdown on a vq with pending descriptors. Let us make sure the outcome of vhost_init_is_le never depend on the state it is actually supposed to initialize, and fix virtio_net by removing the reset from vhost_vq_init_access. With the above, there is no reason for vhost_reset_is_le to do just half of the job. Let us make vhost_reset_is_le reinitialize is_le. Signed-off-by:
Halil Pasic <pasic@linux.vnet.ibm.com> Reported-by:
Michael A. Tebolt <miket@us.ibm.com> Reported-by:
Dr. David Alan Gilbert <dgilbert@redhat.com> Fixes: commit 2751c988 ("vhost: cross-endian support for legacy devices") Cc: <stable@vger.kernel.org> Signed-off-by:
Greg Kurz <groug@kaod.org> Tested-by:
-
Michael S. Tsirkin authored
This reverts commit c7070619. This has been shown to regress on some ARM systems: by forcing on DMA API usage for ARM systems, we have inadvertently kicked open a hornets' nest in terms of cache-coherency. Namely that unless the virtio device is explicitly described as capable of coherent DMA by firmware, the DMA APIs on ARM and other DT-based platforms will assume it is non-coherent. This turns out to cause a big problem for the likes of QEMU and kvmtool, which generate virtio-mmio devices in their guest DTs but neglect to add the often-overlooked "dma-coherent" property; as a result, we end up with the guest making non-cacheable accesses to the vring, the host doing so cacheably, both talking past each other and things going horribly wrong. We are working on a safer work-around. Fixes: c7070619 ("vring: Force use of DMA API for ARM-based systems with legacy devices") Reported-by:
Robin Murphy <robin.murphy@arm.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com>
-
Greg Kroah-Hartman authored
Merge tag 'usb-serial-4.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus Johan writes: USB-serial fixes for v4.10-rc7 One more device ID for pl2303. Signed-off-by:
Johan Hovold <johan@kernel.org>
-
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds authored
Pull MMC fix from Ulf Hansson: "MMC host: sdhci: Avoid hang when receiving spurious CARD_INT interrupts" * tag 'mmc-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci: Ignore unexpected CARD_INT interrupts
-
git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Another fixes pull for v4.10, it's a bit big due to the backport of the VMA fixes for i915 that should fix the oops on shutdown problems that you've worked around. There are also two drm core connector registration fixes, a bunch of nouveau regression fixes and two AMD fixes" * tag 'drm-fixes-for-v4.10-rc7' of git://people.freedesktop.org/~airlied/linux: drm/radeon: Fix vram_size/visible values in DRM_RADEON_GEM_INFO ioctl drm/amdgpu/si: fix crash on headless asics drm/i915: Track pinned vma in intel_plane_state drm/atomic: Unconditionally call prepare_fb. drm/atomic: Fix double free in drm_atomic_state_default_clear drm/nouveau/kms/nv50: request vblank events for commits that send completion events drm/nouveau/nv1a,nv1f/disp: fix memory clock rate retrieval drm/nouveau/disp/gt215: Fix HDA ELD handling (thus, HDMI audio) on gt215 drm/nouveau/nouveau/led: prevent compiling the led-code if nouveau=y and leds=m drm/nouveau/disp/mcp7x: disable dptmds workaround drm/nouveau: prevent userspace from deleting client object drm/nouveau/fence/g84-: protect against concurrent access to semaphore buffers drm: Don't race connector registration drm: prevent double-(un)registration for connectors
-
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: "The main change is we're reverting the initial stack protector support we merged this cycle. It turns out to not work on toolchains built with libc support, and fixing it will be need to wait for another release. And the rest are all fairly minor: - Some pasemi machines were not booting due to a missing error check in prom_find_boot_cpu() - In EEH we were checking a pointer rather than the bool it pointed to - The clang build was broken by a BUILD_BUG_ON() we added. - The radix (Power9 only) version of map_kernel_page() was broken if our memory size was a multiple of 2MB, which it generally isn't Thanks to: Darren Stevens, Gavin Shan, Reza Arbab" * tag 'powerpc-4.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/mm: Use the correct pointer when setting a 2MB pte powerpc: Fix build failure with clang due to BUILD_BUG_ON() powerpc: Revert the initial stack protector support powerpc/eeh: Fix wrong flag passed to eeh_unfreeze_pe() powerpc: Add missing error check to prom_find_boot_cpu() -
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull tracing fix from Steven Rostedt: "Simple fix of s/static struct __init/static __init struct/" * tag 'trace-v4.10-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/kprobes: Fix __init annotation
-
Linus Torvalds authored
Merge kcrctab entry fixes from Ard Biesheuvel: "This is a followup to [0] 'modversions: redefine kcrctab entries as relative CRC pointers', but since relative CRC pointers do not work in modules, and are actually only needed by powerpc with CONFIG_RELOCATABLE=y, I have made it a Kconfig selectable feature instead. First it introduces the MODULE_REL_CRCS Kconfig symbol, and adds the kbuild handling of it, i.e., modpost, genksyms and kallsyms. Then it switches all architectures to 32-bit CRC entries in kcrctab, where all architectures except powerpc with CONFIG_RELOCATABLE=y use absolute ELF symbol references as before" [0] http://marc.info/?l=linux-arch&m=148493613415294&w=2 * emailed patches from Ard Biesheuvel: module: unify absolute krctab definitions for 32-bit and 64-bit modversions: treat symbol CRCs as 32 bit quantities kbuild: modversions: add infrastructure for emitting relative CRCs
-
Ard Biesheuvel authored
The function order_base_2() is defined (according to the comment block) as returning zero on input zero, but subsequently passes the input into roundup_pow_of_two(), which is explicitly undefined for input zero. This has gone unnoticed until now, but optimization passes in GCC 7 may produce constant folded function instances where a constant value of zero is passed into order_base_2(), resulting in link errors against the deliberately undefined '____ilog2_NaN'. So update order_base_2() to adhere to its own documented interface. [ See http://marc.info/?l=linux-kernel&m=147672952517795&w=2 and follow-up discussion for more background. The gcc "optimization pass" is really just broken, but now the GCC trunk problem seems to have escaped out of just specially built daily images, so we need to work around it in mainline. - Linus ] Signed-off-by:Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
-
