- 16 Jul, 2015 40 commits
-
-
Cornelia Huck authored
commit 431dae77 upstream. Eric noticed problems with vhost-scsi and virtio-ccw: vhost-scsi complained about overwriting values in the config space, which was triggered by a broken implementation of virtio-ccw's config get/set routines. It was probably sheer luck that we did not hit this before. When writing a value to the config space, the WRITE_CONF ccw will always write from the beginning of the config space up to and including the value to be set. If the config space up to the value has not yet been retrieved from the device, however, we'll end up overwriting values. Keep track of the known config space and update if needed to avoid this. Moreover, READ_CONF will only read the number of bytes it has been instructed to retrieve, so we must not copy more than that to the buffer, or we might overwrite trailing values. Reported-by:
Eric Farman <farman@linux.vnet.ibm.com> Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Kamal Mostafa <kamal@canonical.com>
-
Radim Krčmář authored
commit db138562 upstream. Legacy NMI watchdog didn't work after migration/resume, because vapics_in_nmi_mode was left at 0. Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
-
Radim Krčmář authored
commit 42720138 upstream. Writes were a bit racy, but hard to turn into a bug at the same time. (Particularly because modern Linux doesn't use this feature anymore.) Signed-off-by:
-
Lv Zheng authored
commit 0ea61381 upstream. ACPICA commit 4da56eeae0749dfe8491285c1e1fad48f6efafd8 The following commit temporarily disables correct 64-bit FADT addresses favor during the period the root cause of the bug is not fixed: Commit: 85dbd580 ACPICA: Tables: Restore old behavor to favor 32-bit FADT addresses. With enough protections, this patch re-enables 64-bit FADT addresses by default. If regressions are reported against such change, this patch should be bisected and reverted. Note that 64-bit FACS favor and 64-bit firmware waking vector favor are excluded by this commit in order not to break OSPMs. Lv Zheng. Link: https://bugzilla.kernel.org/show_bug.cgi?id=74021 Link: https://github.com/acpica/acpica/commit/4da56eeaReported-and-tested-by:
Oswald Buddenhagen <ossi@kde.org> Signed-off-by:
Lv Zheng <lv.zheng@intel.com> Signed-off-by:
Bob Moore <robert.moore@intel.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
-
Lv Zheng authored
commit c04be184 upstream. ACPICA commit 90f5332a15e9d9ba83831ca700b2b9f708274658 This patch adds a new FACS initialization flag for acpi_tb_initialize(). acpi_enable_subsystem() might be invoked several times in OS bootup process, and we don't want FACS initialization to be invoked twice. Lv Zheng. Link: https://github.com/acpica/acpica/commit/90f5332aSigned-off-by:
-
Lv Zheng authored
commit c04e1fb4 upstream. ACPICA commit f7b86f35416e3d1f71c3d816ff5075ddd33ed486 The following commit is reported to have broken s2ram on some platforms: Commit: 0249ed24 ACPICA: Add option to favor 32-bit FADT addresses. The platform reports 2 FACS tables (which is not allowed by ACPI specification) and the new 32-bit address favor rule forces OSPMs to use the FACS table reported via FADT's X_FIRMWARE_CTRL field. The root cause of the reported bug might be one of the followings: 1. BIOS may favor the 64-bit firmware waking vector address when the version of the FACS is greater than 0 and Linux currently only supports resuming from the real mode, so the 64-bit firmware waking vector has never been set and might be invalid to BIOS while the commit enables higher version FACS. 2. BIOS may favor the FACS reported via the "FIRMWARE_CTRL" field in the FADT while the commit doesn't set the firmware waking vector address of the FACS reported by "FIRMWARE_CTRL", it only sets the firware waking vector address of the FACS reported by "X_FIRMWARE_CTRL". This patch excludes the cases that can trigger the bugs caused by the root cause 2. There is no handshaking mechanism can be used by OSPM to tell BIOS which FACS is currently used. Thus the FACS reported by "FIRMWARE_CTRL" may still be used by BIOS and the 0 value of the 32-bit firmware waking vector might trigger such failure. This patch tries to favor 32bit FACS address in another way where both the FACS reported by "FIRMWARE_CTRL" and the FACS reported by "X_FIRMWARE_CTRL" are loaded so that further commit can set firmware waking vector in the both tables to ensure we can exclude the cases that trigger the bugs caused by the root cause 2. The exclusion is split into 2 commits as this commit is also useful for dumping more ACPI tables, it won't get reverted when such exclusion is no longer necessary. Lv Zheng. Link: https://bugzilla.kernel.org/show_bug.cgi?id=74021 Link: https://github.com/acpica/acpica/commit/f7b86f35Reported-and-tested-by:
-
Stevens, Nick authored
commit 347d7e45 upstream. The mcp3021 scaling code is dividing the VDD (full-scale) value in millivolts by the A2D resolution to obtain the scaling factor. When VDD is 3300mV (the standard value) and the resolution is 12-bit (4096 divisions), the result is a scale factor of 3300/4096, which is always one. Effectively, the raw A2D reading is always being returned because no scaling is applied. This patch fixes the issue and simplifies the register-to-volts calculation, removing the unneeded "output_scale" struct member. Signed-off-by:
Nick Stevens <Nick.Stevens@digi.com> [Guenter Roeck: Dropped unnecessary value check] Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
-
Constantine Shulyupin authored
commit 56172d81 upstream. Excerpt from datasheet: 7.2.32 Mode Selection Register RTD3_MD : 00=Closed , 01=Reserved , 10=Thermistor mode , 11=Voltage sense Show temp3 only in Thermistor mode Signed-off-by:
Constantine Shulyupin <const@MakeLinux.com> Signed-off-by:
-
Eric W. Biederman authored
commit 93e3bce6 upstream. The warning message in prepend_path is unclear and outdated. It was added as a warning that the mechanism for generating names of pseudo files had been removed from prepend_path and d_dname should be used instead. Unfortunately the warning reads like a general warning, making it unclear what to do with it. Remove the warning. The transition it was added to warn about is long over, and I added code several years ago which in rare cases causes the warning to fire on legitimate code, and the warning is now firing and scaring people for no good reason. Reported-by:
Ivan Delalande <colona@arista.com> Reported-by:
Omar Sandoval <osandov@osandov.com> Fixes: f48cfddc ("vfs: In d_path don't call d_dname on a mount point") Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
-
Eric W. Biederman authored
commit 7236c85e upstream. fs_fully_visible attempts to make fresh mounts of proc and sysfs give the mounter no more access to proc and sysfs than if they could have by creating a bind mount. One aspect of proc and sysfs that makes this particularly tricky is that there are other filesystems that typically mount on top of proc and sysfs. As those filesystems are mounted on empty directories in practice it is safe to ignore them. However testing to ensure filesystems are mounted on empty directories has not been something the in kernel data structures have supported so the current test for an empty directory which checks to see if nlink <= 2 is a bit lacking. proc and sysfs have recently been modified to use the new empty_dir infrastructure to create all of their dedicated mount points. Instead of testing for S_ISDIR(inode->i_mode) && i_nlink <= 2 to see if a directory is empty, test for is_empty_dir_inode(inode). That small change guaranteess mounts found on proc and sysfs really are safe to ignore, because the directories are not only empty but nothing can ever be added to them. This guarantees there is nothing to worry about when mounting proc and sysfs. Signed-off-by:
-
Eric W. Biederman authored
commit f9bb4882 upstream. This allows for better documentation in the code and it allows for a simpler and fully correct version of fs_fully_visible to be written. The mount points converted and their filesystems are: /sys/hypervisor/s390/ s390_hypfs /sys/kernel/config/ configfs /sys/kernel/debug/ debugfs /sys/firmware/efi/efivars/ efivarfs /sys/fs/fuse/connections/ fusectl /sys/fs/pstore/ pstore /sys/kernel/tracing/ tracefs /sys/fs/cgroup/ cgroup /sys/kernel/security/ securityfs /sys/fs/selinux/ selinuxfs /sys/fs/smackfs/ smackfs Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
-
Eric W. Biederman authored
commit 87d2846f upstream. Add two functions sysfs_create_mount_point and sysfs_remove_mount_point that hang a permanently empty directory off of a kobject or remove a permanently emptpy directory hanging from a kobject. Export these new functions so modular filesystems can use them. Acked-by:
-
Eric W. Biederman authored
commit ea015218 upstream. Add a new function kernfs_create_empty_dir that can be used to create directory that can not be modified. Update the code to use make_empty_dir_inode when reporting a permanently empty directory to the vfs. Update the code to not allow adding to permanently empty directories. Signed-off-by:
-
Eric W. Biederman authored
commit eb6d38d5 upstream. Add a new function proc_create_mount_point that when used to creates a directory that can not be added to. Add a new function is_empty_pde to test if a function is a mount point. Update the code to use make_empty_dir_inode when reporting a permanently empty directory to the vfs. Update the code to not allow adding to permanently empty directories. Update /proc/openprom and /proc/fs/nfsd to be permanently empty directories. Signed-off-by:
-
Eric W. Biederman authored
commit f9bd6733 upstream. Add a magic sysctl table sysctl_mount_point that when used to create a directory forces that directory to be permanently empty. Update the code to use make_empty_dir_inode when accessing permanently empty directories. Update the code to not allow adding to permanently empty directories. Update /proc/sys/fs/binfmt_misc to be a permanently empty directory. Signed-off-by:
-
Eric W. Biederman authored
commit fbabfd0f upstream. To ensure it is safe to mount proc and sysfs I need to check if filesystems that are mounted on top of them are mounted on truly empty directories. Given that some directories can gain entries over time, knowing that a directory is empty right now is insufficient. Therefore add supporting infrastructure for permantently empty directories that proc and sysfs can use when they create mount points for filesystems and fs_fully_visible can use to test for permanently empty directories to ensure that nothing will be gained by mounting a fresh copy of proc or sysfs. Signed-off-by:
-
David Howells authored
commit 155e35d4 upstream. Introduce some function for getting the inode (and also the dentry) in an environment where layered/unioned filesystems are in operation. The problem is that we have places where we need *both* the union dentry and the lower source or workspace inode or dentry available, but we can only have a handle on one of them. Therefore we need to derive the handle to the other from that. The idea is to introduce an extra field in struct dentry that allows the union dentry to refer to and pin the lower dentry. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> [ kamal: 3.19 prereq for: fbabfd0f "fs: Add helper functions for permanently empty directories." Signed-off-by:
-
Eric W. Biederman authored
commit ceeb0e5d upstream. Limit the mounts fs_fully_visible considers to locked mounts. Unlocked can always be unmounted so considering them adds hassle but no security benefit. Signed-off-by:
-
Miklos Szeredi authored
commit 0ad0b325 upstream. fc->release is called from fuse_conn_put() which was used in the error cleanup before fc->release was initialized. [Jeremiah Mahler <jmmahler@gmail.com>: assign fc->release after calling fuse_conn_init(fc) instead of before.] Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Fixes: a325f9b9 ("fuse: update fuse_conn_init() and separate out fuse_conn_kill()") Signed-off-by:
-
Christoffer Dall authored
commit fd28f5d4 upstream. The current pmd_huge() and pud_huge() functions simply check if the table bit is not set and reports the entries as huge in that case. This is counter-intuitive as a clear pmd/pud cannot also be a huge pmd/pud, and it is inconsistent with at least arm and x86. To prevent others from making the same mistake as me in looking at code that calls these functions and to fix an issue with KVM on arm64 that causes memory corruption due to incorrect page reference counting resulting from this mistake, let's change the behavior. Signed-off-by:
Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by:
Steve Capper <steve.capper@linaro.org> Acked-by:
Marc Zyngier <marc.zyngier@arm.com> Fixes: 084bd298 ("ARM64: mm: HugeTLB support.") Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
-
Ilya Dryomov authored
commit 5a60e876 upstream. rbd_obj_request_create() is called on the main I/O path, so we need to use GFP_NOIO to make sure allocation doesn't blow back on us. Not all callers need this, but I'm still hardcoding the flag inside rather than making it a parameter because a) this is going to stable, and b) those callers shouldn't really use rbd_obj_request_create() and will be fixed in the future. More memory allocation fixes will follow. Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Reviewed-by:
Alex Elder <elder@linaro.org> Signed-off-by:
-
Ilya Dryomov authored
commit 82cd003a upstream. struct crush_bucket_tree::num_nodes is u8, so ceph_decode_8_safe() should be used. -Wconversion catches this, but I guess it went unnoticed in all the noise it spews. The actual problem (at least for common crushmaps) isn't the u32 -> u8 truncation though - it's the advancement by 4 bytes instead of 1 in the crushmap buffer. Fixes: http://tracker.ceph.com/issues/2759Signed-off-by:
Josh Durgin <jdurgin@redhat.com> Signed-off-by:
-
Jérôme Glisse authored
commit 2ba8d1bb upstream. In order for hibernation to reliably work we need to properly turn off the SDMA block, sadly after numerous attemps i haven't not found proper sequence for clean and full shutdown. So simply reset both SDMA block, this makes hibernation works reliably on sea island GPU family (CI) Hibernation and suspend to ram were tested (several times) on : Bonaire Hawaii Mullins Kaveri Kabini Signed-off-by:
Jérôme Glisse <jglisse@redhat.com> Reviewed-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
-
Jérôme Glisse authored
commit 161569de upstream. In order for hibernation to reliably work we need to cleanup more thoroughly the compute ring. Hibernation is different from suspend resume as when we resume from hibernation the hardware is first fully initialize by regular kernel then freeze callback happens (which correspond to a suspend inside the radeon kernel driver) and turn off each of the block. It turns out we were not cleanly shutting down the compute ring. This patch fix that. Hibernation and suspend to ram were tested (several times) on : Bonaire Hawaii Mullins Kaveri Kabini Changed since v1: - Factor the ring stop logic into a function taking ring as arg. Signed-off-by:
-
Jani Nikula authored
commit 2059ac3b upstream. Some 855gm models (at least ThinkPad X40) regressed because of commit b0cd324f Author: Jani Nikula <jani.nikula@intel.com> Date: Wed Nov 12 16:25:43 2014 +0200 drm/i915: don't save/restore backlight hist ctl registers which tried to make our driver more robust by not blindly saving and restoring registers, but it failed to take into account commit 0eb96d6e Author: Jesse Barnes <jbarnes@virtuousgeek.org> Date: Wed Oct 14 12:33:41 2009 -0700 drm/i915: save/restore BLC histogram control reg across suspend/resume Fix the regression by enabling hist ctl on gen2. v2: Improved the comment. v3: Improved the comment, again. Reported-and-tested-by:
Philipp Gesang <phg@phi-gamma.net> References: http://mid.gmane.org/20150623222648.GD12335@acheron Fixes: b0cd324f ("drm/i915: don't save/restore backlight hist ctl registers") Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by:
Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
-
Chris Wilson authored
commit 8b572a42 upstream. In needs_ilk_vtd_wa(), we pass in the GPU device but compared it against the ids for the mobile GPU and the mobile host bridge. That latter is impossible and so likely was just a typo for the desktop GPU device id (which is also buggy). Fixes commit da88a5f7 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Feb 13 09:31:53 2013 +0000 drm/i915: Disable WC PTE updates to w/a buggy IOMMU on ILK Reported-by:
Ting-Wei Lan <lantw44@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91127 References: https://bugzilla.freedesktop.org/show_bug.cgi?id=60391Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
-
Takashi Iwai authored
commit 4df3fd17 upstream. Fujitsu Lifebook E780 sets the sequence number 0x0f to only only of the two headphones, thus the driver tries to assign another as the line-out, and this results in the inconsistent mapping between the created jack ctl and the actual I/O. Due to this, PulseAudio doesn't handle it properly and gets the silent output. The fix is to ignore the non-HP sequencer checks. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=99681Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
-
Takashi Iwai authored
commit 7819717b upstream. Acer Aspire V5 with ALC282 codec needs the similar quirk like Dell laptops to support the headset mic. The headset mic pin is 0x19 and it's not exposed by BIOS, thus we need to fix the pincfg as well. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=96201Signed-off-by:
-
Damian Eppel authored
commit 56a94f13 upstream. Whilst testing cpu hotplug events on kernel configured with DEBUG_PREEMPT and DEBUG_ATOMIC_SLEEP we get following BUG message, caused by calling request_irq() and free_irq() in the context of hotplug notification (which is in this case atomic context). [ 40.785859] CPU1: Software reset [ 40.786660] BUG: sleeping function called from invalid context at mm/slub.c:1241 [ 40.786668] in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper/1 [ 40.786678] Preemption disabled at:[< (null)>] (null) [ 40.786681] [ 40.786692] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.19.0-rc4-00024-g7dca860 #36 [ 40.786698] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 40.786728] [<c0014a00>] (unwind_backtrace) from [<c0011980>] (show_stack+0x10/0x14) [ 40.786747] [<c0011980>] (show_stack) from [<c0449ba0>] (dump_stack+0x70/0xbc) [ 40.786767] [<c0449ba0>] (dump_stack) from [<c00c6124>] (kmem_cache_alloc+0xd8/0x170) [ 40.786785] [<c00c6124>] (kmem_cache_alloc) from [<c005d6f8>] (request_threaded_irq+0x64/0x128) [ 40.786804] [<c005d6f8>] (request_threaded_irq) from [<c0350b8c>] (exynos4_local_timer_setup+0xc0/0x13c) [ 40.786820] [<c0350b8c>] (exynos4_local_timer_setup) from [<c0350ca8>] (exynos4_mct_cpu_notify+0x30/0xa8) [ 40.786838] [<c0350ca8>] (exynos4_mct_cpu_notify) from [<c003b330>] (notifier_call_chain+0x44/0x84) [ 40.786857] [<c003b330>] (notifier_call_chain) from [<c0022fd4>] (__cpu_notify+0x28/0x44) [ 40.786873] [<c0022fd4>] (__cpu_notify) from [<c0013714>] (secondary_start_kernel+0xec/0x150) [ 40.786886] [<c0013714>] (secondary_start_kernel) from [<40008764>] (0x40008764) Interrupts cannot be requested/freed in the CPU_STARTING/CPU_DYING notifications which run on the hotplugged cpu with interrupts and preemption disabled. To avoid the issue, request the interrupts for all possible cpus in the boot code. The interrupts are marked NO_AUTOENABLE to avoid a racy request_irq/disable_irq() sequence. The flag prevents the request_irq() code from enabling the interrupt immediately. The interrupt is then enabled in the CPU_STARTING notifier of the hotplugged cpu and again disabled with disable_irq_nosync() in the CPU_DYING notifier. [ tglx: Massaged changelog to match the patch ] Fixes: 7114cd74 ("clocksource: exynos_mct: use (request/free)_irq calls for local timer registration") Reported-by:
Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by:
Marcin Jabrzyk <m.jabrzyk@samsung.com> Signed-off-by:
Damian Eppel <d.eppel@samsung.com> Cc: m.szyprowski@samsung.com Cc: kyungmin.park@samsung.com Cc: daniel.lezcano@linaro.org Cc: kgene@kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1435324984-7328-1-git-send-email-d.eppel@samsung.comSigned-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
-
Xi Wang authored
commit d63903bb upstream. Upper bits should be zeroed in endianness conversion: - even when there's no need to change endianness (i.e., BPF_FROM_BE on big endian or BPF_FROM_LE on little endian); - after rev16. This patch fixes such bugs by emitting extra instructions to clear upper bits. Cc: Zi Shen Lim <zlim.lnx@gmail.com> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Fixes: e54bcde3 ("arm64: eBPF JIT compiler") Signed-off-by:
Xi Wang <xi.wang@gmail.com> Signed-off-by:
-
Steven Rostedt (Red Hat) authored
commit 6b88f44e upstream. While debugging a WARN_ON() for filtering, I found that it is possible for the filter string to be referenced after its end. With the filter: # echo '>' > /sys/kernel/debug/events/ext4/ext4_truncate_exit/filter The filter_parse() function can call infix_get_op() which calls infix_advance() that updates the infix filter pointers for the cnt and tail without checking if the filter is already at the end, which will put the cnt to zero and the tail beyond the end. The loop then calls infix_next() that has ps->infix.cnt--; return ps->infix.string[ps->infix.tail++]; The cnt will now be below zero, and the tail that is returned is already passed the end of the filter string. So far the allocation of the filter string usually has some buffer that is zeroed out, but if the filter string is of the exact size of the allocated buffer there's no guarantee that the charater after the nul terminating character will be zero. Luckily, only root can write to the filter. Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
-
Steven Rostedt (Red Hat) authored
commit b4875bbe upstream. When testing the fix for the trace filter, I could not come up with a scenario where the operand count goes below zero, so I added a WARN_ON_ONCE(cnt < 0) to the logic. But there is legitimate case that it can happen (although the filter would be wrong). # echo '>' > /sys/kernel/debug/events/ext4/ext4_truncate_exit/filter That is, a single operation without any operands will hit the path where the WARN_ON_ONCE() can trigger. Although this is harmless, and the filter is reported as a error. But instead of spitting out a warning to the kernel dmesg, just fail nicely and report it via the proper channels. Link: http://lkml.kernel.org/r/558C6082.90608@oracle.comReported-by:
Vince Weaver <vincent.weaver@maine.edu> Reported-by:
Sasha Levin <sasha.levin@oracle.com> Signed-off-by:
-
Xi Wang authored
commit 8eee539d upstream. Problems occur when bpf_to or bpf_from has value prog->len - 1 (e.g., "Very long jump backwards" in test_bpf where the last instruction is a jump): since ctx->offset has length prog->len, ctx->offset[bpf_to + 1] or ctx->offset[bpf_from + 1] will cause an out-of-bounds read, leading to a bogus jump offset and kernel panic. This patch moves updating ctx->offset to after calling build_insn(), and changes indexing to use bpf_to and bpf_from without + 1. Fixes: e54bcde3 ("arm64: eBPF JIT compiler") Cc: Zi Shen Lim <zlim.lnx@gmail.com> Cc: Will Deacon <will.deacon@arm.com> Acked-by:
-
Stephen Boyd authored
commit be081d9b upstream. John Stultz reported an RCU splat on ARM with ipi trace events enabled. It looks like the same problem exists on ARM64. At this point in the IPI handling path we haven't called irq_enter() yet, so RCU doesn't know that we're about to exit idle and properly warns that we're using RCU from an idle CPU. Use trace_ipi_entry_rcuidle() instead of trace_ipi_entry() so that RCU is informed about our exit from idle. Cc: John Stultz <john.stultz@linaro.org> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Fixes: 45ed695a ("ARM64: add IPI tracepoints") Signed-off-by:
Stephen Boyd <sboyd@codeaurora.org> Signed-off-by:
-
Michael Holzheu authored
commit 3c8e5105 upstream. The REGSET_VX_LOW ELF notes should contain the lower 64 bit halfes of the first sixteen 128 bit vector registers. Unfortunately currently we copy the upper halfes. Fix this and correctly copy the lower halfes. Fixes: a62bc073 ("s390/kdump: add support for vector extension") Signed-off-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
-
Alex Deucher authored
commit 650474fb upstream. Fixes audio problems on newer asics. Noticed by: Kelly Anderson <kelly@xilka.com> Signed-off-by:
-
David Henningsson authored
commit ec56af67 upstream. Thinkpad X250, when attached to a dock, has two headphone outs but no line out. Make sure we don't try to turn this into one headphone and one line out (since that disables the headphone amp on the dock). Alsa-info at http://www.alsa-project.org/db/?f=36f8764e1d782397928feec715d0ef90dfddd4c1Signed-off-by:
David Henningsson <david.henningsson@canonical.com> Signed-off-by:
-
Pali Rohár authored
commit b8830a4e upstream. This commit fix kernel crash when probing for rfkill devices in dell-laptop driver failed. Function free_page() was incorrectly used on struct page * instead of virtual address of SMI buffer. This commit also simplify allocating page for SMI buffer by using __get_free_page() function instead of sequential call of functions alloc_page() and page_address(). Signed-off-by:
Pali Rohár <pali.rohar@gmail.com> Acked-by:
Michal Hocko <mhocko@suse.cz> Signed-off-by:
Darren Hart <dvhart@linux.intel.com> Signed-off-by:
-
Dave Airlie authored
commit 6b8eeca6 upstream. I've only seen this once, and I failed to capture the lockdep backtrace, but I did some investigations. If we are calling into the MST layer from EDID probing, we have the mode_config mutex held, if during that EDID probing, the MST hub goes away, then we can get a deadlock where the connector destruction function in the driver tries to retake the mode config mutex. This offloads connector destruction to a workqueue, and avoid the subsequenct lock ordering issue. Acked-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
-
Larry Finger authored
commit 8a8c35fa upstream. Beginning at commit d52d3997 ("ipv6: Create percpu rt6_info"), the following INFO splat is logged: =============================== [ INFO: suspicious RCU usage. ] 4.1.0-rc7-next-20150612 #1 Not tainted ------------------------------- kernel/sched/core.c:7318 Illegal context switch in RCU-bh read-side critical section! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 3 locks held by systemd/1: #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff815f0c8f>] rtnetlink_rcv+0x1f/0x40 #1: (rcu_read_lock_bh){......}, at: [<ffffffff816a34e2>] ipv6_add_addr+0x62/0x540 #2: (addrconf_hash_lock){+...+.}, at: [<ffffffff816a3604>] ipv6_add_addr+0x184/0x540 stack backtrace: CPU: 0 PID: 1 Comm: systemd Not tainted 4.1.0-rc7-next-20150612 #1 Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.20 04/17/2014 Call Trace: dump_stack+0x4c/0x6e lockdep_rcu_suspicious+0xe7/0x120 ___might_sleep+0x1d5/0x1f0 __might_sleep+0x4d/0x90 kmem_cache_alloc+0x47/0x250 create_object+0x39/0x2e0 kmemleak_alloc_percpu+0x61/0xe0 pcpu_alloc+0x370/0x630 Additional backtrace lines are truncated. In addition, the above splat is followed by several "BUG: sleeping function called from invalid context at mm/slub.c:1268" outputs. As suggested by Martin KaFai Lau, these are the clue to the fix. Routine kmemleak_alloc_percpu() always uses GFP_KERNEL for its allocations, whereas it should follow the gfp from its callers. Reviewed-by:
Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Acked-by:
Martin KaFai Lau <kafai@fb.com> Signed-off-by:
Larry Finger <Larry.Finger@lwfinger.net> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux-foundation.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
-
