- 26 Nov, 2016 23 commits
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Brian Norris authored
commit 6f75c3fd upstream. Consider two devices, A and B, where B is a child of A, and B utilizes asynchronous suspend (it does not matter whether A is sync or async). If B fails to suspend_noirq() or suspend_late(), or is interrupted by a wakeup (pm_wakeup_pending()), then it aborts and sets the async_error variable. However, device A does not (immediately) check the async_error variable; it may continue to run its own suspend_noirq()/suspend_late() callback. This is bad. We can resolve this problem by doing our error and wakeup checking (particularly, for the async_error flag) after waiting for children to suspend, instead of before. This also helps align the logic for the noirq and late suspend cases with the logic in __device_suspend(). It's easy to observe this erroneous behavior by, for example, forcing a device to sleep a bit in its suspend_noirq() (to ensure the parent is waiting for the child to complete), then return an error, and watch the parent suspend_noirq() still get called. (Or similarly, fake a wakeup event at the right (or is it wrong?) time.) Fixes: de377b39 (PM / sleep: Asynchronous threads for suspend_late) Fixes: 28b6fd6e (PM / sleep: Asynchronous threads for suspend_noirq) Reported-by:
Jeffy Chen <jeffy.chen@rock-chips.com> Signed-off-by:
Brian Norris <briannorris@chromium.org> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Johan Hovold authored
commit ceb75787 upstream. Make sure to drop the reference taken by class_find_device() after opening the RTC device. Fixes: 77437fd4 (pm: boot time suspend selftest) Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit d6124b40 upstream. This subsystem consistently fails to drop the device reference taken by class_find_device(). Note that some of these lookup functions already take a reference to the returned data, while others claim no reference is needed (or does not seem need one). Fixes: 183b9b59 ("uwb: add the UWB stack (core files)") Signed-off-by:
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Johan Hovold authored
commit 722f1910 upstream. Make sure to drop the reference taken by bus_find_device_by_name() before returning from mfd_clone_cell(). Fixes: a9bbba99 ("mfd: add platform_device sharing support for mfd") Signed-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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Luca Coelho authored
commit e0d9727c upstream. The SPLC data parsing is too restrictive and was not trying find the correct element for WiFi. This causes problems with some BIOSes where the SPLC method exists, but doesn't have a WiFi entry on the first element of the list. The domain type values are also incorrect according to the specification. Fix this by complying with the actual specification. Additionally, replace all occurrences of SPLX to SPLC, since SPLX is only a structure internal to the ACPI tables, and may not even exist. Fixes: bcb079a1 ("iwlwifi: pcie: retrieve and parse ACPI power limitations") Reported-by:
Chris Rorvick <chris@rorvick.com> Tested-by:
Paul Bolle <pebolle@tiscali.nl> Tested-by:
Luca Coelho <luciano.coelho@intel.com> Signed-off-by:
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Lokesh Vutla authored
commit 3984903a upstream. RTC can be clocked from an external 32KHz oscillator, or from the Peripheral PLL. The RTC has an internal oscillator buffer to support direct operation with a crystal. ---------------------------------------- | Device --------- | | | | | | | RTCSS | | | --------- | | | OSC |<------| RTC | | | | |------>| OSC |--- | | | | -------- | | | | | ----|clk | | | -------- | | | | | | PRCM |--- | | | | -------- -------- | ---------------------------------------- The RTC functional clock is sourced by default from the clock derived from the Peripheral PLL. In order to select source as external osc clk the following changes needs to be done: - Enable the RTC OSC (RTC_OSC_REG[4]OSC32K_GZ = 0) - Enable the clock mux(RTC_OSC_REG[6]K32CLK_EN = 1) - Select the external clock source (RTC_OSC_REG[3]32KCLK_SEL = 1) Fixes: 399cf0f6 ("rtc: omap: Add external clock enabling support") Signed-off-by:
Keerthy <j-keerthy@ti.com> Signed-off-by:
Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by:
Dave Gerlach <d-gerlach@ti.com> Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by:
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Wei Yongjun authored
commit a29e52a6 upstream. Fix the retrn value check which testing the wrong variable in mmp2_clk_init(). Fixes: 1ec770d9 ("clk: mmp: add mmp2 DT support for clock driver") Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by:
Stephen Boyd <sboyd@codeaurora.org> Signed-off-by:
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Wei Yongjun authored
commit deab0726 upstream. Fix the retrn value check which testing the wrong variable in pxa168_clk_init(). Fixes: ab08aefc ("clk: mmp: add pxa168 DT support for clock driver") Signed-off-by:
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Wei Yongjun authored
commit 10f2bfb0 upstream. Fix the retrn value check which testing the wrong variable in pxa910_clk_init(). Fixes: 2bc61da9 ("clk: mmp: add pxa910 DT support for clock driver") Signed-off-by:
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Mario Kleiner authored
commit 8e94a46c upstream. External clients which import our bo's wait only for exclusive dmabuf-fences, not on shared ones, ditto for bo's which we import from external providers and write to. Therefore attach exclusive fences on prime shared buffers if our exported buffer gets imported by an external client, or if we import a buffer from an external exporter. See discussion in thread: https://lists.freedesktop.org/archives/dri-devel/2016-October/122370.html Prime export tested on Intel iGPU + AMD Tonga dGPU as DRI3/Present Prime render offload, and with the Tonga standalone as primary gpu. v2: Add a wait for all shared fences before prime export, as suggested by Christian Koenig. v3: - Mark buffer prime_exported in amdgpu_gem_prime_pin, so we only use the exclusive fence when exporting a bo to external clients like a separate iGPU, but not when exporting/importing from/to ourselves as part of regular DRI3 fd passing. - Propagate failure of reservation_object_wait_rcu back to caller. v4: - Switch to a prime_shared_count counter instead of a flag, which gets in/decremented on prime_pin/unpin, so we can switch back to shared fences if all clients detach from our exported bo. - Also switch to exclusive fence for prime imported bo's. v5: - Drop lret, instead use int ret -> long ret, as proposed by Christian. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=95472 Tested-by: Mike Lothian <mike@fireburn.co.uk> (v1) Signed-off-by:
Mario Kleiner <mario.kleiner.de@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com>. Cc: Christian König <christian.koenig@amd.com> Cc: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Sven Ebenfeld authored
commit 83d2c9a9 upstream. When using AES-XTS on a Wandboard, we receive a Mode error: caam_jr 2102000.jr1: 20001311: CCB: desc idx 19: AES: Mode error. According to the Security Reference Manual, the Low Power AES units of the i.MX6 do not support the XTS mode. Therefore we must not register XTS implementations in the Crypto API. Signed-off-by:
Sven Ebenfeld <sven.ebenfeld@gmail.com> Reviewed-by:
Horia Geantă <horia.geanta@nxp.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au>
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Theodore Ts'o authored
commit 8cdf3372 upstream. If the block size or cluster size is insane, reject the mount. This is important for security reasons (although we shouldn't be just depending on this check). Ref: http://www.securityfocus.com/archive/1/539661 Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1332506Reported-by:
Borislav Petkov <bp@alien8.de> Reported-by:
Nikolay Borisov <kernel@kyup.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Borislav Petkov authored
commit c6a38553 upstream. So Sebastian turned off the PIE for kernel builds but that was too late - Kbuild.include already uses KBUILD_CFLAGS and trying to disable gcc options with, say cc-disable-warning, fails: gcc -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs ... -Wno-sign-compare -fno-asynchronous-unwind-tables -Wframe-address -c -x c /dev/null -o .31392.tmp /dev/null:1:0: error: code model kernel does not support PIC mode because that returns an error and we can't disable the warning. For example in this case: KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) which leads to gcc issuing all those warnings again. So let's turn off PIE/PIC at the earliest possible moment, when we declare KBUILD_CFLAGS so that cc-disable-warning picks it up too. Also, we need the $(call cc-option ...) because -fno-PIE is supported since gcc v3.4 and our lowest supported gcc version is 3.2 right now. Signed-off-by:
Borislav Petkov <bp@suse.de> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Michal Marek <mmarek@suse.com> Signed-off-by:
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Sebastian Andrzej Siewior authored
commit 90944e40 upstream. If the gcc is configured to do -fPIE by default then the build aborts later with: | Unsupported relocation type: unknown type rel type name (29) Tagging it stable so it is possible to compile recent stable kernels as well. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
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Sebastian Andrzej Siewior authored
commit 82031ea2 upstream. Adding -no-PIE to the fstack protector check. -no-PIE was introduced before -fstack-protector so there is no need for a runtime check. Without it the build stops: |Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong available but compiler is broken due to -mcmodel=kernel + -fPIE if -fPIE is enabled by default. Tagging it stable so it is possible to compile recent stable kernels as well. Signed-off-by:
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Sebastian Andrzej Siewior authored
commit 8ae94224 upstream. Debian started to build the gcc with -fPIE by default so the kernel build ends before it starts properly with: |kernel/bounds.c:1:0: error: code model kernel does not support PIC mode Also add to KBUILD_AFLAGS due to: |gcc -Wp,-MD,arch/x86/entry/vdso/vdso32/.note.o.d … -mfentry -DCC_USING_FENTRY … vdso/vdso32/note.S |arch/x86/entry/vdso/vdso32/note.S:1:0: sorry, unimplemented: -mfentry isn’t supported for 32-bit in combination with -fpic Tagging it stable so it is possible to compile recent stable kernels as well. Signed-off-by:
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Linus Walleij authored
commit 93d710a6 upstream. We get the following build error from UM Linux after adding an entry to drivers/iio/gyro/Kconfig that issues "select I2C_MUX": ERROR: "devm_ioremap_resource" [drivers/i2c/muxes/i2c-mux-reg.ko] undefined! ERROR: "of_address_to_resource" [drivers/i2c/muxes/i2c-mux-reg.ko] undefined! It appears that the I2C mux core code depends on HAS_IOMEM for historical reasons, while CONFIG_I2C_MUX_REG does *not* have a direct dependency on HAS_IOMEM. This creates a situation where a allyesconfig or allmodconfig for UM Linux will select I2C_MUX, and will implicitly enable I2C_MUX_REG as well, and the compilation will fail for the register driver. Fix this up by making I2C_MUX_REG depend on HAS_IOMEM and removing the dependency from I2C_MUX. Reported-by:
kbuild test robot <fengguang.wu@intel.com> Reported-by:
Jonathan Cameron <jic23@jic23.retrosnub.co.uk> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Acked-by:
Jonathan Cameron <jic23@kernel.org> Acked-by:
Peter Rosin <peda@axentia.se> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Oliver Hartkopp authored
commit deb507f9 upstream. Andrey Konovalov reported an issue with proc_register in bcm.c. As suggested by Cong Wang this patch adds a lock_sock() protection and a check for unsuccessful proc_create_data() in bcm_connect(). Reference: http://marc.info/?l=linux-netdev&m=147732648731237Reported-by:
Andrey Konovalov <andreyknvl@google.com> Suggested-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
Oliver Hartkopp <socketcan@hartkopp.net> Acked-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Azhar Shaikh authored
commit 274e43ed upstream. Commit 41a3da2b ("mfd: intel-lpss: Save register context on suspend") saved the register context while going to suspend and also put the device in reset state. Due to the resetting of device, system cannot enter S3/S0ix states when no_console_suspend flag is enabled. The system and serial console both hang. The resetting of device is not needed while going to suspend. Hence remove this code. Fixes: 41a3da2b ("mfd: intel-lpss: Save register context on suspend") Signed-off-by:
Azhar Shaikh <azhar.shaikh@intel.com> Acked-by:
Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
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Miklos Szeredi authored
commit 59c3b76c upstream. If pos is at the beginning of a page and copied is zero then page is not zeroed but is marked uptodate. Fix by skipping everything except unlock/put of page if zero bytes were copied. Reported-by:
Al Viro <viro@zeniv.linux.org.uk> Fixes: 6b12c1b3 ("fuse: Implement write_begin/write_end callbacks") Signed-off-by:
Miklos Szeredi <mszeredi@redhat.com> Signed-off-by:
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Ignacio Alvarado authored
commit 1650b4eb upstream. Function user_notifier_unregister should be called only once for each registered user notifier. Function kvm_arch_hardware_disable can be executed from an IPI context which could cause a race condition with a VCPU returning to user mode and attempting to unregister the notifier. Signed-off-by:
Ignacio Alvarado <ikalvarado@google.com> Fixes: 18863bdd ("KVM: x86 shared msr infrastructure") Reviewed-by:
Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Paolo Bonzini authored
commit 7301d6ab upstream. Reported by syzkaller: [ INFO: suspicious RCU usage. ] 4.9.0-rc4+ #47 Not tainted ------------------------------- ./include/linux/kvm_host.h:536 suspicious rcu_dereference_check() usage! stack backtrace: CPU: 1 PID: 6679 Comm: syz-executor Not tainted 4.9.0-rc4+ #47 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff880039e2f6d0 ffffffff81c2e46b ffff88003e3a5b40 0000000000000000 0000000000000001 ffffffff83215600 ffff880039e2f700 ffffffff81334ea9 ffffc9000730b000 0000000000000004 ffff88003c4f8420 ffff88003d3f8000 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81c2e46b>] dump_stack+0xb3/0x118 lib/dump_stack.c:51 [<ffffffff81334ea9>] lockdep_rcu_suspicious+0x139/0x180 kernel/locking/lockdep.c:4445 [< inline >] __kvm_memslots include/linux/kvm_host.h:534 [< inline >] kvm_memslots include/linux/kvm_host.h:541 [<ffffffff8105d6ae>] kvm_gfn_to_hva_cache_init+0xa1e/0xce0 virt/kvm/kvm_main.c:1941 [<ffffffff8112685d>] kvm_lapic_set_vapic_addr+0xed/0x140 arch/x86/kvm/lapic.c:2217 Reported-by:
Dmitry Vyukov <dvyukov@google.com> Fixes: fda4e2e8 Cc: Andrew Honig <ahonig@google.com> Signed-off-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
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Yazen Ghannam authored
commit b0b6e868 upstream. cpu_llc_id (Last Level Cache ID) derivation on AMD Fam17h has an underflow bug when extracting the socket_id value. It starts from 0 so subtracting 1 from it will result in an invalid value. This breaks scheduling topology later on since the cpu_llc_id will be incorrect. For example, the the cpu_llc_id of the *other* CPU in the loops in set_cpu_sibling_map() underflows and we're generating the funniest thread_siblings masks and then when I run 8 threads of nbench, they get spread around the LLC domains in a very strange pattern which doesn't give you the normal scheduling spread one would expect for performance. Other things like EDAC use cpu_llc_id so they will be b0rked too. So, the APIC ID is preset in APICx020 for bits 3 and above: they contain the core complex, node and socket IDs. The LLC is at the core complex level so we can find a unique cpu_llc_id by right shifting the APICID by 3 because then the least significant bit will be the Core Complex ID. Tested-by:
Yazen Ghannam <Yazen.Ghannam@amd.com> [ Cleaned up and extended the commit message. ] Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 3849e91f ("x86/AMD: Fix last level cache topology for AMD Fam17h systems") Link: http://lkml.kernel.org/r/20161108083506.rvqb5h4chrcptj7d@pd.tnicSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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- 21 Nov, 2016 17 commits
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Greg Kroah-Hartman authored
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David S. Miller authored
[ Upstream commit 0fd0ff01 ] Now that all of the user copy routines are converted to return accurate residual lengths when an exception occurs, we no longer need the broken fixup routines. Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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David S. Miller authored
[ Upstream commit 614da3d9 ] All of __ret{,l}_mone{_asi,_fp,_asi_fpu} are now unused. Signed-off-by:
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David S. Miller authored
[ Upstream commit ee841d0a ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit e93704e4 ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit 7ae3aaf5 ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit 95707704 ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit cb736fdb ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit d0796b55 ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit 0096ac9f ] Report the exact number of bytes which have not been successfully copied when an exception occurs, using the running remaining length. Signed-off-by:
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David S. Miller authored
[ Upstream commit 83a17d26 ] The fixup helper function mechanism for handling user copy fault handling is not %100 accurrate, and can never be made so. We are going to transition the code to return the running return return length, which is always kept track in one or more registers of each of these routines. In order to convert them one by one, we have to allow the existing behavior to continue functioning. Therefore make all the copy code that wants the fixup helper to be used return negative one. After all of the user copy routines have been converted, this logic and the fixup helpers themselves can be removed completely. Signed-off-by:
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David S. Miller authored
[ Upstream commit aa95ce36 ] It is completely unused. Signed-off-by:
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David S. Miller authored
[ Upstream commit a74ad5e6 ] When the vmalloc area gets fragmented, and because the firmware mapping area sits between where modules live and the vmalloc area, we can sometimes receive requests for enormous kernel TLB range flushes. When this happens the cpu just spins flushing billions of pages and this triggers the NMI watchdog and other problems. We took care of this on the TSB side by doing a linear scan of the table once we pass a certain threshold. Do something similar for the TLB flush, however we are limited by the TLB flush facilities provided by the different chip variants. First of all we use an (mostly arbitrary) cut-off of 256K which is about 32 pages. This can be tuned in the future. The huge range code path for each chip works as follows: 1) On spitfire we flush all non-locked TLB entries using diagnostic acceses. 2) On cheetah we use the "flush all" TLB flush. 3) On sun4v/hypervisor we do a TLB context flush on context 0, which unlike previous chips does not remove "permanent" or locked entries. We could probably do something better on spitfire, such as limiting the flush to kernel TLB entries or even doing range comparisons. However that probably isn't worth it since those chips are old and the TLB only had 64 entries. Reported-by:
James Clarke <jrtc27@jrtc27.com> Tested-by:
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David S. Miller authored
[ Upstream commit a236441b ] Just like the non-cross-call TLB flush handlers, the cross-call ones need to avoid doing PC-relative branches outside of their code blocks. Signed-off-by:
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David S. Miller authored
[ Upstream commit 830cda3f ] Noticed by James Clarke. Signed-off-by:
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David S. Miller authored
[ Upstream commit b429ae4d ] When we copy code over to patch another piece of code, we can only use PC-relative branches that target code within that piece of code. Such PC-relative branches cannot be made to external symbols because the patch moves the location of the code and thus modifies the relative address of external symbols. Use an absolute jmpl to fix this problem. Signed-off-by:
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David S. Miller authored
[ Upstream commit 849c4987 ] If the number of pages we are flushing is more than twice the number of entries in the TSB, just scan the TSB table for matches rather than probing each and every page in the range. Based upon a patch and report by James Clarke. Signed-off-by:
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