- 19 Apr, 2015 23 commits
-
-
Alex Deucher authored
commit 3899ca84 upstream. Need to expand the check to handle short circuiting if the selected state is the same as current state. bug: https://bugs.freedesktop.org/show_bug.cgi?id=87796Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
Ville Syrjälä authored
commit 840a1cf0 upstream. The legcy colorkey ioctls are only implemented for sprite planes, so reject the ioctl for primary/cursor planes. If we want to support colorkeying with these planes (assuming we have hw support of course) we should just move ahead with the colorkey property conversion. Testcase: kms_legacy_colorkey Cc: Tommi Rantala <tt.rantala@gmail.com> Reference: http://mid.gmane.org/CA+ydwtr+bCo7LJ44JFmUkVRx144UDFgOS+aJTfK6KHtvBDVuAw@mail.gmail.comReported-and-tested-by:
Tommi Rantala <tt.rantala@gmail.com> Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
-
Jani Nikula authored
commit ad692b46 upstream. If the user supplies EDID through firmware or debugfs override, the driver callbacks are bypassed and the connector ELD does not get updated, and audio fails. Set ELD for firmware and debugfs EDIDs too. There should be no harm in gratuitously doing this for non HDMI/DP connectors, as it's still up to the driver to use the ELD, if any. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82349 Reference: https://bugs.freedesktop.org/show_bug.cgi?id=80691Reported-by:
Emil <emilsvennesson@gmail.com> Reported-by:
Rob Engle <grenoble@gmail.com> Tested-by:
Jolan Luff <jolan@gormsby.com> Reviewed-by:
-
Daniel Vetter authored
commit 8218c3f4 upstream. Originally it was impossible to be dropping the last refcount in this function since there was always one around still from the idr. But in commit 83f45fc3 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Wed Aug 6 09:10:18 2014 +0200 drm: Don't grab an fb reference for the idr we've switched to weak references, broke that assumption but forgot to fix it up. Since we still force-disable planes it's only possible to hit this when racing multiple rmfb with fbdev restoring or similar evil things. As long as userspace is nice it's impossible to hit the BUG_ON. But the BUG_ON would most likely be hit from fbdev code, which usually invovles the console_lock besides all modeset locks. So very likely we'd never get the bug reports if this was hit in the wild, hence better be safe than sorry and backport. Spotted by Matt Roper while reviewing other patches. [airlied: pull this back into 4.0 - the oops happens there] Cc: Matt Roper <matthew.d.roper@intel.com> Reviewed-by:
Matt Roper <matthew.d.roper@intel.com> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
-
Mike Snitzer authored
commit e9637415 upstream. Linux 3.19 commit 69c953c8 ("lib/lcm.c: lcm(n,0)=lcm(0,n) is 0, not n") caused blk_stack_limits() to not properly stack queue_limits for stacked devices (e.g. DM). Fix this regression by establishing lcm_not_zero() and switching blk_stack_limits() over to using it. DM uses blk_set_stacking_limits() to establish the initial top-level queue_limits that are then built up based on underlying devices' limits using blk_stack_limits(). In the case of optimal_io_size (io_opt) blk_set_stacking_limits() establishes a default value of 0. With commit 69c953c8, lcm(0, n) is no longer n, which compromises proper stacking of the underlying devices' io_opt. Test: $ modprobe scsi_debug dev_size_mb=10 num_tgts=1 opt_blks=1536 $ cat /sys/block/sde/queue/optimal_io_size 786432 $ dmsetup create node --table "0 100 linear /dev/sde 0" Before this fix: $ cat /sys/block/dm-5/queue/optimal_io_size 0 After this fix: $ cat /sys/block/dm-5/queue/optimal_io_size 786432 Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Acked-by:
Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
-
Wenbo Wang authored
commit 7ee8e4f3 upstream. Use the right array index to reference the last element of rq->biotail->bi_io_vec[] Signed-off-by:
Wenbo Wang <wenbo.wang@memblaze.com> Reviewed-by:
Chong Yuan <chong.yuan@memblaze.com> Fixes: 66cb45aa ("block: add support for limiting gaps in SG lists") Signed-off-by:
-
Sam Bradshaw authored
commit bc188d81 upstream. When allocating from the reserved tags pool, bt_get() is called with a NULL hctx. If all tags are in use, the hw queue is kicked to push out any pending IO, potentially freeing tags, and tag allocation is retried. The problem is that blk_mq_run_hw_queue() doesn't check for a NULL hctx. So we avoid it with a simple NULL hctx test. Tested by hammering mtip32xx with concurrent smartctl/hdparm. Signed-off-by:
Sam Bradshaw <sbradshaw@micron.com> Signed-off-by:
Selvan Mani <smani@micron.com> Fixes: b3223207 ("blk-mq: fix hang in bt_get()") Added appropriate comment. Signed-off-by:
-
Mike Snitzer authored
commit 9a30b096 upstream. If percpu_ref_init() fails the allocated q and hctxs must get cleaned up; using 'err_map' doesn't allow that to happen. Signed-off-by:
Ming Lei <ming.lei@canonical.com> Signed-off-by:
-
Joe Perches authored
commit 6436a123 upstream. Return a negative error value like the rest of the entries in this function. Signed-off-by:
Joe Perches <joe@perches.com> Acked-by:
Stephen Smalley <sds@tycho.nsa.gov> [PM: tweaked subject line] Signed-off-by:
Paul Moore <pmoore@redhat.com> Signed-off-by:
-
Chen-Yu Tsai authored
commit fdc0074c upstream. As the sunxi usb clocks all contain a reset controller, it is not possible to build the sunxi clock driver without RESET_CONTROLLER enabled. Doing so results in an undefined symbol error: drivers/built-in.o: In function `sunxi_gates_clk_setup': linux/drivers/clk/sunxi/clk-sunxi.c:1071: undefined reference to `reset_controller_register' This is possible if building a minimal kernel without PHY_SUN4I_USB. The dependency issue is made visible at compile time instead of link time by the new A80 mmc clocks, which also use a reset control itself. This patch makes ARCH_SUNXI select ARCH_HAS_RESET_CONTROLLER and RESET_CONTROLLER. Fixes: 559482d1 ARM: sunxi: Split the various SoCs support in Kconfig Reported-by:
Lourens Rozema <ik@lourensrozema.nl> Acked-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
-
Vineet Gupta authored
commit e4140819 upstream. A malicious signal handler / restorer can DOS the system by fudging the user regs saved on stack, causing weird things such as sigreturn returning to user mode PC but cpu state still being kernel mode.... Ensure that in sigreturn path status32 always has U bit; any other bogosity (gargbage PC etc) will be taken care of by normal user mode exceptions mechanisms. Reproducer signal handler: void handle_sig(int signo, siginfo_t *info, void *context) { ucontext_t *uc = context; struct user_regs_struct *regs = &(uc->uc_mcontext.regs); regs->scratch.status32 = 0; } Before the fix, kernel would go off to weeds like below: --------->8----------- [ARCLinux]$ ./signal-test Path: /signal-test CPU: 0 PID: 61 Comm: signal-test Not tainted 4.0.0-rc5+ #65 task: 8f177880 ti: 5ffe6000 task.ti: 8f15c000 [ECR ]: 0x00220200 => Invalid Write @ 0x00000010 by insn @ 0x00010698 [EFA ]: 0x00000010 [BLINK ]: 0x2007c1ee [ERET ]: 0x10698 [STAT32]: 0x00000000 : <-------- BTA: 0x00010680 SP: 0x5ffe7e48 FP: 0x00000000 LPS: 0x20003c6c LPE: 0x20003c70 LPC: 0x00000000 ... --------->8----------- Reported-by:
Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by:
Vineet Gupta <vgupta@synopsys.com> Signed-off-by:
-
Vineet Gupta authored
commit 6914e1e3 upstream. The regfile provided to SA_SIGINFO signal handler as ucontext was off by one due to pt_regs gutter cleanups in 2013. Before handling signal, user pt_regs are copied onto user_regs_struct and copied back later. Both structs are binary compatible. This was all fine until commit 2fa91904 (ARC: pt_regs update #2) which removed the empty stack slot at top of pt_regs (corresponding to first pad) and made the corresponding fixup in struct user_regs_struct (the pad in there was moved out of @scratch - not removed altogether as it is part of ptrace ABI) struct user_regs_struct { + long pad; struct { - long pad; long bta, lp_start, lp_end,.... } scratch; ... } This meant that now user_regs_struct was off by 1 reg w.r.t pt_regs and signal code needs to user_regs_struct.scratch to reflect it as pt_regs, which is what this commit does. This problem was hidden for 2 years, because both save/restore, despite using wrong location, were using the same location. Only an interim inspection (reproducer below) exposed the issue. void handle_segv(int signo, siginfo_t *info, void *context) { ucontext_t *uc = context; struct user_regs_struct *regs = &(uc->uc_mcontext.regs); printf("regs %x %x\n", <=== prints 7 8 (vs. 8 9) regs->scratch.r8, regs->scratch.r9); } int main() { struct sigaction sa; sa.sa_sigaction = handle_segv; sa.sa_flags = SA_SIGINFO; sigemptyset(&sa.sa_mask); sigaction(SIGSEGV, &sa, NULL); asm volatile( "mov r7, 7 \n" "mov r8, 8 \n" "mov r9, 9 \n" "mov r10, 10 \n" :::"r7","r8","r9","r10"); *((unsigned int*)0x10) = 0; } Fixes: 2fa91904 "ARC: pt_regs update #2: Remove unused gutter at start of pt_regs" Signed-off-by:
-
Matwey V. Kornilov authored
commit a43f32d6 upstream. Struct spear13xx_pcie_driver was in initdata, but we passed a pointer to it to platform_driver_register(), which can use the pointer at arbitrary times in the future, even after the initdata is freed. That leads to crashes. Move spear13xx_pcie_driver and things referenced by it (spear13xx_pcie_probe() and dw_pcie_host_init()) out of initdata. [bhelgaas: changelog] Fixes: 6675ef21 ("PCI: spear: Fix Section mismatch compilation warning for probe()") Signed-off-by:
Matwey V. Kornilov <matwey@sai.msu.ru> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Acked-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
-
Bjorn Helgaas authored
commit 8647ca9a upstream. Booting a v3.18 or newer Xen domU kernel with PCI devices passed through results in an oops (this is a 32-bit 3.13.11 dom0 with a 64-bit 4.4.0 hypervisor and 32-bit domU): BUG: unable to handle kernel paging request at 0030303e IP: [<c06ed0e6>] acpi_ns_validate_handle+0x12/0x1a Call Trace: [<c06eda4d>] ? acpi_evaluate_object+0x31/0x1fc [<c06b78e1>] ? pci_get_hp_params+0x111/0x4e0 [<c0407bc7>] ? xen_force_evtchn_callback+0x17/0x30 [<c04085fb>] ? xen_restore_fl_direct_reloc+0x4/0x4 [<c0699d34>] ? pci_device_add+0x24/0x450 Don't look for ACPI configuration information if ACPI has been disabled. I don't think this is the best fix, because we can boot plain Linux (no Xen) with "acpi=off", and we don't need this check in pci_get_hp_params(). There should be a better fix that would make Xen domU work the same way. The domU kernel has ACPI support but it has no AML. There should be a way to initialize the ACPI data structures so things fail gracefully rather than oopsing. This is an interim fix to address the regression. Fixes: 6cd33649 ("PCI: Add pci_configure_device() during enumeration") Link: https://bugzilla.kernel.org/show_bug.cgi?id=96301Reported-by:
Michael D Labriola <mlabriol@gdeb.com> Tested-by:
-
Bjorn Helgaas authored
commit d10b730f upstream. This reverts commit d63e2e1f. David Ahern reported that d63e2e1f breaks booting on an 8-socket T5 sparc system. He also verified that the system boots with d63e2e1f reverted. Yinghai has some fixes, but they need a little more polishing than we can do before v4.0. Link: http://lkml.kernel.org/r/5514391F.2030300@oracle.com # report Link: http://lkml.kernel.org/r/1427857069-6789-1-git-send-email-yinghai@kernel.org # patches Signed-off-by:
-
Dan Carpenter authored
commit bc3b5b47 upstream. I don't have this hardware but it looks like we weren't adding bridge devices as intended. Maybe the bridge is always the last device? Fixes: 05b12500 ("PCI: cpcihp: Iterate over all devices in slot, not functions 0-7") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Yijing Wang <wangyijing@huawei.com> Signed-off-by:
-
Rasmus Villemoes authored
commit a1b7f2f6 upstream. Commit fab4c256 ("PCI/AER: Add a TLP header print helper") introduced the helper function __print_tlp_header(), but contrary to the intention, the behaviour did change: Since we're taking the address of the parameter t, the first 4 or 8 bytes printed will be the value of the pointer t itself, and the remaining 12 or 8 bytes will be who-knows-what (something from the stack). We want to show the values of the four members of the struct aer_header_log_regs; that can be done without ugly and error-prone casts. On little-endian this should produce the same output as originally intended, and since no-one has complained about getting garbage output so far, I think big-endian should be ok too. Fixes: fab4c256 ("PCI/AER: Add a TLP header print helper") Signed-off-by:
Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by:
Borislav Petkov <bp@suse.de> Signed-off-by:
-
Takashi Iwai authored
commit cc7016ab upstream. Some BIOS version of Fujitsu Lifebook T731 seems to set up the headphone pin (0x21) without the assoc number 0x0f while it's set only to the output on the docking port (0x1a). With the recent commit [03ad6a8c: ALSA: hda - Fix "PCM" name being used on one DAC when there are two DACs], this resulted in the weird mixer element mapping where the headphone on the laptop is assigned as a shared volume with the speaker and the docking port is assigned as an individual headphone. This patch improves the situation by correcting the headphone pin config to the more appropriate value. Reported-and-tested-by:
Taylor Smock <smocktaylor@gmail.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
-
Kailang Yang authored
commit a59d7199 upstream. Pin sense will active when power pin is wake up. Power pin will not wake up immediately during resume state. Add some delay to wait for power pin activated. Signed-off-by:
Kailang Yang <kailang@realtek.com> Signed-off-by:
-
Takashi Sakamoto authored
commit a053fc31 upstream. Some M-Audio devices require to receive bootup command just after powering on, while codes in BeBoB driver doesn't work properly in big-endian machine because the command should be aligned by little-endian. This commit fixes this bug. This fix should go to stable kernel. Cc: Takayuki Shiroma <t.shiroma.oki@gmail.com> Signed-off-by:
Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by:
-
Dmitry M. Fedin authored
commit 3dc8523f upstream. Adds an entry for Creative USB X-Fi to the rc_config array in mixer_quirks.c to allow use of volume knob on the device. Adds support for newer X-Fi Pro card, known as "Model No. SB1095" with USB ID "041e:3237" Signed-off-by:
Dmitry M. Fedin <dmitry.fedin@gmail.com> Signed-off-by:
-
Hui Wang authored
commit af95b414 upstream. We have a HP machine which use the codec node 0x17 connecting the internal speaker, and from the node capability, we saw the EAPD, if we don't set the EAPD on for this node, the internal speaker can't output any sound. BugLink: https://bugs.launchpad.net/bugs/1436745Signed-off-by:
Hui Wang <hui.wang@canonical.com> Signed-off-by:
-
Sebastian Wicki authored
commit 80b311d3 upstream. This model uses the same dock port as the previous generation. Signed-off-by:
Sebastian Wicki <gandro@gmx.net> Signed-off-by:
-
- 13 Apr, 2015 17 commits
-
-
Greg Kroah-Hartman authored
-
Ameya Palande authored
commit c8648508 upstream. On success, callback function returns 0. So invert the if condition check so that we can break out of loop. Signed-off-by:
Ameya Palande <2ameya@gmail.com> Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
-
Markos Chandras authored
commit 87f966d9 upstream. On a MIPS Malta board, tons of fifo underflow errors have been observed when using u-boot as bootloader instead of YAMON. The reason for that is that YAMON used to set the pcnet device to SRAM mode but u-boot does not. As a result, the default Tx threshold (64 bytes) is now too small to keep the fifo relatively used and it can result to Tx fifo underflow errors. As a result of which, it's best to setup the SRAM on supported controllers so we can always use the NOUFLO bit. Cc: <netdev@vger.kernel.org> Cc: <linux-kernel@vger.kernel.org> Cc: Don Fry <pcnet32@frontier.com> Signed-off-by:
Markos Chandras <markos.chandras@imgtec.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
-
Scott Wood authored
commit bb344ca5 upstream. Commit 746c9e9f "of/base: Fix PowerPC address parsing hack" limited the applicability of the workaround whereby a missing ranges is treated as an empty ranges. This workaround was hiding a bug in the etsec2 device tree nodes, which have children with reg, but did not have ranges. Signed-off-by:
Scott Wood <scottwood@freescale.com> Reported-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
-
Tyrel Datwyler authored
commit f6ff0414 upstream. We currently use the device tree update code in the kernel after resuming from a suspend operation to re-sync the kernels view of the device tree with that of the hypervisor. The code as it stands is not endian safe as it relies on parsing buffers returned by RTAS calls that thusly contains data in big endian format. This patch annotates variables and structure members with __be types as well as performing necessary byte swaps to cpu endian for data that needs to be parsed. Signed-off-by:
Tyrel Datwyler <tyreld@linux.vnet.ibm.com> Cc: Nathan Fontenot <nfont@linux.vnet.ibm.com> Cc: Cyril Bur <cyrilbur@gmail.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
-
Steve Capper authored
commit f3eab718 upstream. this_cpu operations were implemented for arm64 in: 5284e1b4 arm64: xchg: Implement cmpxchg_double f97fc810 arm64: percpu: Implement this_cpu operations Unfortunately, it is possible for pre-emption to take place between address generation and data access. This can lead to cases where data is being manipulated by this_cpu for a different CPU than it was called on. Which effectively breaks the spec. This patch disables pre-emption for the this_cpu operations guaranteeing that address generation and data manipulation take place without a pre-emption in-between. Fixes: 5284e1b4 ("arm64: xchg: Implement cmpxchg_double") Fixes: f97fc810 ("arm64: percpu: Implement this_cpu operations") Reported-by:
Mark Rutland <mark.rutland@arm.com> Acked-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Steve Capper <steve.capper@linaro.org> [catalin.marinas@arm.com: remove space after type cast] Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
-
Catalin Marinas authored
commit e53f21bc upstream. The idle_task_exit() function may call switch_mm() with next == &init_mm. On arm64, init_mm.pgd cannot be used for user mappings, so this patch simply sets the reserved TTBR0. Reported-by:
Jon Medhurst (Tixy) <tixy@linaro.org> Tested-by:
-
Keerthy authored
commit e03826d5 upstream. The register offset for REGEN2_CTRL in different for TPS659038 chip as when compared with other Palmas family PMICs. In the case of TPS659038 the wrong offset pointed to PLLEN_CTRL and was causing a hang. Correcting the same. Signed-off-by:
Keerthy <j-keerthy@ti.com> Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
-
Mahesh Salgaonkar authored
commit 44d5f6f5 upstream. commit id 2ba9f0d8 has changed CONFIG_KVM_BOOK3S_64_HV to tristate to allow HV/PR bits to be built as modules. But the MCE code still depends on CONFIG_KVM_BOOK3S_64_HV which is wrong. When user selects CONFIG_KVM_BOOK3S_64_HV=m to build HV/PR bits as a separate module the relevant MCE code gets excluded. This patch fixes the MCE code to use CONFIG_KVM_BOOK3S_64_HANDLER. This makes sure that the relevant MCE code is included when HV/PR bits are built as a separate modules. Fixes: 2ba9f0d8 ("kvm: powerpc: book3s: Support building HV and PR KVM as module") Signed-off-by:
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
-
Sergei Antonov authored
commit 98cf21c6 upstream. Fix B-tree corruption when a new record is inserted at position 0 in the node in hfs_brec_insert(). In this case a hfs_brec_update_parent() is called to update the parent index node (if exists) and it is passed hfs_find_data with a search_key containing a newly inserted key instead of the key to be updated. This results in an inconsistent index node. The bug reproduces on my machine after an extents overflow record for the catalog file (CNID=4) is inserted into the extents overflow B-tree. Because of a low (reserved) value of CNID=4, it has to become the first record in the first leaf node. The resulting first leaf node is correct: ---------------------------------------------------- | key0.CNID=4 | key1.CNID=123 | key2.CNID=456, ... | ---------------------------------------------------- But the parent index key0 still contains the previous key CNID=123: ----------------------- | key0.CNID=123 | ... | ----------------------- A change in hfs_brec_insert() makes hfs_brec_update_parent() work correctly by preventing it from getting fd->record=-1 value from __hfs_brec_find(). Along the way, I removed duplicate code with unification of the if condition. The resulting code is equivalent to the original code because node is never 0. Also hfs_brec_update_parent() will now return an error after getting a negative fd->record value. However, the return value of hfs_brec_update_parent() is not checked anywhere in the file and I'm leaving it unchanged by this patch. brec.c lacks error checking after some other calls too, but this issue is of less importance than the one being fixed by this patch. Signed-off-by:
Sergei Antonov <saproj@gmail.com> Cc: Joe Perches <joe@perches.com> Reviewed-by:
Vyacheslav Dubeyko <slava@dubeyko.com> Acked-by:
Hin-Tak Leung <htl10@users.sourceforge.net> Cc: Anton Altaparmakov <aia21@cam.ac.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
-
Uwe Kleine-König authored
commit 391949b6 upstream. With spidev the mesg->complete callback points to spidev_complete. Calling this unblocks spidev_sync and so spidev_sync_write finishes. As the struct spi_message just read is a local variable in spidev_sync_write and recording the trace event accesses this message the recording is better done first. The same can happen for spidev_sync_read. This fixes an oops observed on a 3.14-rt system with spidev activity after echo 1 > /sys/kernel/debug/tracing/events/spi/enable . Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by:
-
Andy Shevchenko authored
commit 854d2f24 upstream. The logic of DMA completion is broken now since test_and_clear_bit() never returns the other bit is set. It means condition are always false and we have spi_finalize_current_transfer() called per each DMA completion which is wrong. The patch fixes logic by clearing BUSY bit first and then check for the other one. Fixes: 30c8eb52 (spi: dw-mid: split rx and tx callbacks when DMA) Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
-
Ivan T. Ivanov authored
commit 12cb89e3 upstream. num-cs is 32 bit property, don't read just upper 16 bits. Fixes: 4a8573ab (spi: qup: Remove chip select function) Signed-off-by:
Ivan T. Ivanov <iivanov@mm-sol.com> Signed-off-by:
-
Mikulas Patocka authored
commit 09ee96b2 upstream. The "dm snapshot: suspend origin when doing exception handover" commit fixed a exception store handover bug associated with pending exceptions to the "snapshot-origin" target. However, a similar problem exists in snapshot merging. When snapshot merging is in progress, we use the target "snapshot-merge" instead of "snapshot-origin". Consequently, during exception store handover, we must find the snapshot-merge target and suspend its associated mapped_device. To avoid lockdep warnings, the target must be suspended and resumed without holding _origins_lock. Introduce a dm_hold() function that grabs a reference on a mapped_device, but unlike dm_get(), it doesn't crash if the device has the DMF_FREEING flag set, it returns an error in this case. In snapshot_resume() we grab the reference to the origin device using dm_hold() while holding _origins_lock (_origins_lock guarantees that the device won't disappear). Then we release _origins_lock, suspend the device and grab _origins_lock again. NOTE to stable@ people: When backporting to kernels 3.18 and older, use dm_internal_suspend and dm_internal_resume instead of dm_internal_suspend_fast and dm_internal_resume_fast. Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
-
Mikulas Patocka authored
commit b735fede upstream. In the function snapshot_resume we perform exception store handover. If there is another active snapshot target, the exception store is moved from this target to the target that is being resumed. The problem is that if there is some pending exception, it will point to an incorrect exception store after that handover, causing a crash due to dm-snap-persistent.c:get_exception()'s BUG_ON. This bug can be triggered by repeatedly changing snapshot permissions with "lvchange -p r" and "lvchange -p rw" while there are writes on the associated origin device. To fix this bug, we must suspend the origin device when doing the exception store handover to make sure that there are no pending exceptions: - introduce _origin_hash that keeps track of dm_origin structures. - introduce functions __lookup_dm_origin, __insert_dm_origin and __remove_dm_origin that manipulate the origin hash. - modify snapshot_resume so that it calls dm_internal_suspend_fast() and dm_internal_resume_fast() on the origin device. NOTE to stable@ people: When backporting to kernels 3.12-3.18, use dm_internal_suspend and dm_internal_resume instead of dm_internal_suspend_fast and dm_internal_resume_fast. When backporting to kernels older than 3.12, you need to pick functions dm_internal_suspend and dm_internal_resume from the commit fd2ed4d2. Signed-off-by:
-
Joe Thornber authored
commit 5f027a3b upstream. It was always intended that a read to an unprovisioned block will return zeroes regardless of whether the pool is in read-only or read-write mode. thin_bio_map() was inconsistent with its handling of such reads when the pool is in read-only mode, it now properly zero-fills the bios it returns in response to unprovisioned block reads. Eliminate thin_bio_map()'s special read-only mode handling of -ENODATA and just allow the IO to be deferred to the worker which will result in pool->process_bio() handling the IO (which already properly zero-fills reads to unprovisioned blocks). Reported-by:
Eric Sandeen <sandeen@redhat.com> Signed-off-by:
Joe Thornber <ejt@redhat.com> Signed-off-by:
-
Darrick J. Wong authored
commit e5db2980 upstream. Since it's possible for the discard and write same queue limits to change while the upper level command is being sliced and diced, fix up both of them (a) to reject IO if the special command is unsupported at the start of the function and (b) read the limits once and let the commands error out on their own if the status happens to change. Signed-off-by:
Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by:
-
