- 06 Jun, 2016 21 commits
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Paul Burton authored
[ Upstream commit f4281bba ] The following patch will expose __update_cache to highmem pages. Handle them by mapping them in for the duration of the cache maintenance, just like in __flush_dcache_page. The code for that isn't shared because we need the page address in __update_cache so sharing became messy. Given that the entirity is an extra 5 lines, just duplicate it. Signed-off-by:
Paul Burton <paul.burton@imgtec.com> Cc: Lars Persson <lars.persson@axis.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jerome Marchand <jmarchan@redhat.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: stable <stable@vger.kernel.org> # v4.1+ Patchwork: https://patchwork.linux-mips.org/patch/12721/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
Sasha Levin <sasha.levin@oracle.com>
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Paul Burton authored
[ Upstream commit 234859e4 ] When flush_dcache_page is called on an executable page, that page is about to be provided to userland & we can presume that the icache contains no valid entries for its address range. However if the icache does not fill from the dcache then we cannot presume that the pages content has been written back as far as the memories that the dcache will fill from (ie. L2 or further out). This was being done for lowmem pages, but not for highmem which can lead to icache corruption. Fix this by mapping highmem pages & flushing their content from the dcache in __flush_dcache_page before providing the page to userland, just as is done for lowmem pages. Signed-off-by:
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Guilherme G. Piccoli authored
[ Upstream commit c2078d9e ] This reverts commit 89a51df5. The function eeh_add_device_early() is used to perform EEH initialization in devices added later on the system, like in hotplug/DLPAR scenarios. Since the commit 89a51df5 ("powerpc/eeh: Fix crash in eeh_add_device_early() on Cell") a new check was introduced in this function - Cell has no EEH capabilities which led to kernel oops if hotplug was performed, so checking for eeh_enabled() was introduced to avoid the issue. However, in architectures that EEH is present like pSeries or PowerNV, we might reach a case in which no PCI devices are present on boot time and so EEH is not initialized. Then, if a device is added via DLPAR for example, eeh_add_device_early() fails because eeh_enabled() is false, and EEH end up not being enabled at all. This reverts the aforementioned patch since a new verification was introduced by the commit d91dafc0 ("powerpc/eeh: Delay probing EEH device during hotplug") and so the original Cell issue does not happen anymore. Cc: stable@vger.kernel.org # v4.1+ Reviewed-by:
Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by:
Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Gavin Shan authored
[ Upstream commit 5a0cdbfd ] The function eeh_pe_reset_and_recover() is used to recover EEH error when the passthrou device are transferred to guest and backwards. The content in the device's config space will be lost on PE reset issued in the middle of the recovery. The function saves/restores it before/after the reset. However, config access to some adapters like Broadcom BCM5719 at this point will causes fenced PHB. The config space is always blocked and we save 0xFF's that are restored at late point. The memory BARs are totally corrupted, causing another EEH error upon access to one of the memory BARs. This restores the config space on those adapters like BCM5719 from the content saved to the EEH device when it's populated, to resolve above issue. Fixes: 5cfb20b9 ("powerpc/eeh: Emulate EEH recovery for VFIO devices") Cc: stable@vger.kernel.org #v3.18+ Signed-off-by:
Russell Currey <ruscur@russell.cc> Signed-off-by:
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Gavin Shan authored
[ Upstream commit affeb0f2 ] The function eeh_pe_reset_and_recover() is used to recover EEH error when the passthrough device are transferred to guest and backwards, meaning the device's driver is vfio-pci or none. When the driver is vfio-pci that provides error_detected() error handler only, the handler simply stops the guest and it's not expected behaviour. On the other hand, no error handlers will be called if we don't have a bound driver. This ignores the error handler in eeh_pe_reset_and_recover() that reports the error to device driver to avoid the exceptional behaviour. Fixes: 5cfb20b9 ("powerpc/eeh: Emulate EEH recovery for VFIO devices") Cc: stable@vger.kernel.org #v3.18+ Signed-off-by:
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Sasha Levin authored
[ Upstream commit 20878232 ] Systems show a minimal load average of 0.00, 0.01, 0.05 even when they have no load at all. Uptime and /proc/loadavg on all systems with kernels released during the last five years up until kernel version 4.6-rc5, show a 5- and 15-minute minimum loadavg of 0.01 and 0.05 respectively. This should be 0.00 on idle systems, but the way the kernel calculates this value prevents it from getting lower than the mentioned values. Likewise but not as obviously noticeable, a fully loaded system with no processes waiting, shows a maximum 1/5/15 loadavg of 1.00, 0.99, 0.95 (multiplied by number of cores). Once the (old) load becomes 93 or higher, it mathematically can never get lower than 93, even when the active (load) remains 0 forever. This results in the strange 0.00, 0.01, 0.05 uptime values on idle systems. Note: 93/2048 = 0.0454..., which rounds up to 0.05. It is not correct to add a 0.5 rounding (=1024/2048) here, since the result from this function is fed back into the next iteration again, so the result of that +0.5 rounding value then gets multiplied by (2048-2037), and then rounded again, so there is a virtual "ghost" load created, next to the old and active load terms. By changing the way the internally kept value is rounded, that internal value equivalent now can reach 0.00 on idle, and 1.00 on full load. Upon increasing load, the internally kept load value is rounded up, when the load is decreasing, the load value is rounded down. The modified code was tested on nohz=off and nohz kernels. It was tested on vanilla kernel 4.6-rc5 and on centos 7.1 kernel 3.10.0-327. It was tested on single, dual, and octal cores system. It was tested on virtual hosts and bare hardware. No unwanted effects have been observed, and the problems that the patch intended to fix were indeed gone. Tested-by:
Damien Wyart <damien.wyart@free.fr> Signed-off-by:
Vik Heyndrickx <vik.heyndrickx@veribox.net> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: <stable@vger.kernel.org> Cc: Doug Smythies <dsmythies@telus.net> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: 0f004f5a ("sched: Cure more NO_HZ load average woes") Link: http://lkml.kernel.org/r/e8d32bff-d544-7748-72b5-3c86cc71f09f@veribox.netSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Sasha Levin authored
[ Upstream commit cf968937 ] We can't use kfree_skb in irq disable context, because spin_lock_irqsave make sure we are always in irq disable context, use dev_kfree_skb_irq instead of kfree_skb is better than dev_kfree_skb_any. This patch fix below kernel warning: [ 7612.095528] ------------[ cut here ]------------ [ 7612.095546] WARNING: CPU: 3 PID: 4460 at kernel/softirq.c:150 __local_bh_enable_ip+0x58/0x80() [ 7612.095550] Modules linked in: rtl8723be x86_pkg_temp_thermal btcoexist rtl_pci rtlwifi rtl8723_common [ 7612.095567] CPU: 3 PID: 4460 Comm: ifconfig Tainted: G W 4.4.0+ #4 [ 7612.095570] Hardware name: LENOVO 20DFA04FCD/20DFA04FCD, BIOS J5ET48WW (1.19 ) 08/27/2015 [ 7612.095574] 00000000 00000000 da37fc70 c12ce7c5 00000000 da37fca0 c104cc59 c19d4454 [ 7612.095584] 00000003 0000116c c19d4784 00000096 c10508a8 c10508a8 00000200 c1b42400 [ 7612.095594] f29be780 da37fcb0 c104ccad 00000009 00000000 da37fcbc c10508a8 f21f08b8 [ 7612.095604] Call Trace: [ 7612.095614] [<c12ce7c5>] dump_stack+0x41/0x5c [ 7612.095620] [<c104cc59>] warn_slowpath_common+0x89/0xc0 [ 7612.095628] [<c10508a8>] ? __local_bh_enable_ip+0x58/0x80 [ 7612.095634] [<c10508a8>] ? __local_bh_enable_ip+0x58/0x80 [ 7612.095640] [<c104ccad>] warn_slowpath_null+0x1d/0x20 [ 7612.095646] [<c10508a8>] __local_bh_enable_ip+0x58/0x80 [ 7612.095653] [<c16b7d34>] destroy_conntrack+0x64/0xa0 [ 7612.095660] [<c16b300f>] nf_conntrack_destroy+0xf/0x20 [ 7612.095665] [<c1677565>] skb_release_head_state+0x55/0xa0 [ 7612.095670] [<c16775bb>] skb_release_all+0xb/0x20 [ 7612.095674] [<c167760b>] __kfree_skb+0xb/0x60 [ 7612.095679] [<c16776f0>] kfree_skb+0x30/0x70 [ 7612.095686] [<f81b869d>] ? rtl_pci_reset_trx_ring+0x22d/0x370 [rtl_pci] [ 7612.095692] [<f81b869d>] rtl_pci_reset_trx_ring+0x22d/0x370 [rtl_pci] [ 7612.095698] [<f81b87f9>] rtl_pci_start+0x19/0x190 [rtl_pci] [ 7612.095705] [<f81970e6>] rtl_op_start+0x56/0x90 [rtlwifi] [ 7612.095712] [<c17e3f16>] drv_start+0x36/0xc0 [ 7612.095717] [<c17f5ab3>] ieee80211_do_open+0x2d3/0x890 [ 7612.095725] [<c16820fe>] ? call_netdevice_notifiers_info+0x2e/0x60 [ 7612.095730] [<c17f60bd>] ieee80211_open+0x4d/0x50 [ 7612.095736] [<c16891b3>] __dev_open+0xa3/0x130 [ 7612.095742] [<c183fa53>] ? _raw_spin_unlock_bh+0x13/0x20 [ 7612.095748] [<c1689499>] __dev_change_flags+0x89/0x140 [ 7612.095753] [<c127c70d>] ? selinux_capable+0xd/0x10 [ 7612.095759] [<c1689589>] dev_change_flags+0x29/0x60 [ 7612.095765] [<c1700b93>] devinet_ioctl+0x553/0x670 [ 7612.095772] [<c12db758>] ? _copy_to_user+0x28/0x40 [ 7612.095777] [<c17018b5>] inet_ioctl+0x85/0xb0 [ 7612.095783] [<c166e647>] sock_ioctl+0x67/0x260 [ 7612.095788] [<c166e5e0>] ? sock_fasync+0x80/0x80 [ 7612.095795] [<c115c99b>] do_vfs_ioctl+0x6b/0x550 [ 7612.095800] [<c127c812>] ? selinux_file_ioctl+0x102/0x1e0 [ 7612.095807] [<c10a8914>] ? timekeeping_suspend+0x294/0x320 [ 7612.095813] [<c10a256a>] ? __hrtimer_run_queues+0x14a/0x210 [ 7612.095820] [<c1276e24>] ? security_file_ioctl+0x34/0x50 [ 7612.095827] [<c115cef0>] SyS_ioctl+0x70/0x80 [ 7612.095832] [<c1001804>] do_fast_syscall_32+0x84/0x120 [ 7612.095839] [<c183ff91>] sysenter_past_esp+0x36/0x55 [ 7612.095844] ---[ end trace 97e9c637a20e8348 ]--- Signed-off-by:
Wang YanQing <udknight@gmail.com> Cc: Stable <stable@vger.kernel.org> Acked-by:
Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Sasha Levin authored
[ Upstream commit 873ffe15 ] In commit a269913c ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue"), the tests for enter/exit power-save mode were inverted. With this change applied, the wifi connection becomes much more stable. Fixes: a269913c ("rtlwifi: Rework rtl_lps_leave() and rtl_lps_enter() to use work queue") Signed-off-by:
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Arnd Bergmann authored
[ Upstream commit c9c6837d ] gcc-6 started warning by default about variables that are not used anywhere and that are marked 'const', generating many false positives in an allmodconfig build, e.g.: arch/arm/mach-davinci/board-da830-evm.c:282:20: warning: 'da830_evm_emif25_pins' defined but not used [-Wunused-const-variable=] arch/arm/plat-omap/dmtimer.c:958:34: warning: 'omap_timer_match' defined but not used [-Wunused-const-variable=] drivers/bluetooth/hci_bcm.c:625:39: warning: 'acpi_bcm_default_gpios' defined but not used [-Wunused-const-variable=] drivers/char/hw_random/omap-rng.c:92:18: warning: 'reg_map_omap4' defined but not used [-Wunused-const-variable=] drivers/devfreq/exynos/exynos5_bus.c:381:32: warning: 'exynos5_busfreq_int_pm' defined but not used [-Wunused-const-variable=] drivers/dma/mv_xor.c:1139:34: warning: 'mv_xor_dt_ids' defined but not used [-Wunused-const-variable=] This is similar to the existing -Wunused-but-set-variable warning that was added in an earlier release and that we disable by default now and only enable when W=1 is set, so it makes sense to do the same here. Once we have eliminated the majority of the warnings for both, we can put them back into the default list. We probably want this in backport kernels as well, to allow building them with gcc-6 without introducing extra warnings. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Acked-by:
Olof Johansson <olof@lixom.net> Acked-by:
Lee Jones <lee.jones@linaro.org> Cc: stable@vger.kernel.org Signed-off-by:
Michal Marek <mmarek@suse.com> Signed-off-by:
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Marc Zyngier authored
[ Upstream commit 7c9b9730 ] The GICv3 driver wrongly assumes that it runs on the non-secure side of a secure-enabled system, while it could be on a system with a single security state, or a GICv3 with GICD_CTLR.DS set. Either way, it is important to configure this properly, or interrupts will simply not be delivered on this HW. Cc: stable@vger.kernel.org Reported-by:
Peter Maydell <peter.maydell@linaro.org> Tested-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Will Deacon authored
[ Upstream commit f86c4fbd ] When an IPI is generated by a CPU, the pattern looks roughly like: <write shared data> smp_wmb(); <write to GIC to signal SGI> On the receiving CPU we rely on the fact that, once we've taken the interrupt, then the freshly written shared data must be visible to us. Put another way, the CPU isn't going to speculate taking an interrupt. Unfortunately, this assumption turns out to be broken. Consider that CPUx wants to send an IPI to CPUy, which will cause CPUy to read some shared_data. Before CPUx has done anything, a random peripheral raises an IRQ to the GIC and the IRQ line on CPUy is raised. CPUy then takes the IRQ and starts executing the entry code, heading towards gic_handle_irq. Furthermore, let's assume that a bunch of the previous interrupts handled by CPUy were SGIs, so the branch predictor kicks in and speculates that irqnr will be <16 and we're likely to head into handle_IPI. The prefetcher then grabs a speculative copy of shared_data which contains a stale value. Meanwhile, CPUx gets round to updating shared_data and asking the GIC to send an SGI to CPUy. Internally, the GIC decides that the SGI is more important than the peripheral interrupt (which hasn't yet been ACKed) but doesn't need to do anything to CPUy, because the IRQ line is already raised. CPUy then reads the ACK register on the GIC, sees the SGI value which confirms the branch prediction and we end up with a stale shared_data value. This patch fixes the problem by adding an smp_rmb() to the IPI entry code in gic_handle_irq. As it turns out, the combination of a control dependency and an ISB instruction from the EOI in the GICv3 driver is enough to provide the ordering we need, so we add a comment there justifying the absence of an explicit smp_rmb(). Cc: stable@vger.kernel.org Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
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Arnd Bergmann authored
[ Upstream commit c87bf431 ] Enabling CONFIG_GCOV_PROFILE_ALL produces us a lot of warnings like lib/lz4/lz4hc_compress.c: In function 'lz4_compresshcctx': lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1504 bytes is larger than 1024 bytes [-Wframe-larger-than=] After some investigation, I found that this behavior started with gcc-4.9, and opened https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69702. A suggested workaround for it is to use the -fno-tree-loop-im flag that turns off one of the optimization stages in gcc, so the code runs a little slower but does not use excessive amounts of stack. We could make this conditional on the gcc version, but I could not find an easy way to do this in Kbuild and the benefit would be fairly small, given that most of the gcc version in production are affected now. I'm marking this for 'stable' backports because it addresses a bug with code generation in gcc that exists in all kernel versions with the affected gcc releases. Signed-off-by:
Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Cc: stable@vger.kernel.org Signed-off-by:
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James Hogan authored
[ Upstream commit b45bacd2 ] Writing CP0_Compare clears the timer interrupt pending bit (CP0_Cause.TI), but this wasn't being done atomically. If a timer interrupt raced with the write of the guest CP0_Compare, the timer interrupt could end up being pending even though the new CP0_Compare is nowhere near CP0_Count. We were already updating the hrtimer expiry with kvm_mips_update_hrtimer(), which used both kvm_mips_freeze_hrtimer() and kvm_mips_resume_hrtimer(). Close the race window by expanding out kvm_mips_update_hrtimer(), and clearing CP0_Cause.TI and setting CP0_Compare between the freeze and resume. Since the pending timer interrupt should not be cleared when CP0_Compare is written via the KVM user API, an ack argument is added to distinguish the source of the write. Fixes: e30492bb ("MIPS: KVM: Rewrite count/compare timer emulation") Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim KrÄmáÅ
™ " <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Cc: <stable@vger.kernel.org> # 3.16.x- Signed-off-by:Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
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James Hogan authored
[ Upstream commit 4355c44f ] There's a particularly narrow and subtle race condition when the software emulated guest timer is frozen which can allow a guest timer interrupt to be missed. This happens due to the hrtimer expiry being inexact, so very occasionally the freeze time will be after the moment when the emulated CP0_Count transitions to the same value as CP0_Compare (so an IRQ should be generated), but before the moment when the hrtimer is due to expire (so no IRQ is generated). The IRQ won't be generated when the timer is resumed either, since the resume CP0_Count will already match CP0_Compare. With VZ guests in particular this is far more likely to happen, since the soft timer may be frozen frequently in order to restore the timer state to the hardware guest timer. This happens after 5-10 hours of guest soak testing, resulting in an overflow in guest kernel timekeeping calculations, hanging the guest. A more focussed test case to intentionally hit the race (with the help of a new hypcall to cause the timer state to migrated between hardware & software) hits the condition fairly reliably within around 30 seconds. Instead of relying purely on the inexact hrtimer expiry to determine whether an IRQ should be generated, read the guest CP0_Compare and directly check whether the freeze time is before or after it. Only if CP0_Count is on or after CP0_Compare do we check the hrtimer expiry to determine whether the last IRQ has already been generated (which will have pushed back the expiry by one timer period). Fixes: e30492bb ("MIPS: KVM: Rewrite count/compare timer emulation") Signed-off-by:
™ " <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Cc: <stable@vger.kernel.org> # 3.16.x- Signed-off-by: -
Catalin Vasile authored
[ Upstream commit e930c765 ] caam_jr_alloc() used to return NULL if a JR device could not be allocated for a session. In turn, every user of this function used IS_ERR() function to verify if anything went wrong, which does NOT look for NULL values. This made the kernel crash if the sanity check failed, because the driver continued to think it had allocated a valid JR dev instance to the session and at some point it tries to do a caam_jr_free() on a NULL JR dev pointer. This patch is a fix for this issue. Cc: <stable@vger.kernel.org> Signed-off-by:
Catalin Vasile <cata.vasile@nxp.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 028c49f5 ] The interface read URB is submitted in attach, but was only unlinked by the driver at disconnect. In case of a late probe error (e.g. due to failed minor allocation), disconnect is never called and we would end up with active URBs for an unbound interface. This in turn could lead to deallocated memory being dereferenced in the completion callback. Fixes: f7a33e60 ("USB: serial: add quatech2 usb to serial driver") Cc: stable <stable@vger.kernel.org> # v3.5: 40d04738Signed-off-by:
Johan Hovold <johan@kernel.org> Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 9e452849 ] The interface read and event URBs are submitted in attach, but were never explicitly unlinked by the driver. Instead the URBs would have been killed by usb-serial core on disconnect. In case of a late probe error (e.g. due to failed minor allocation), disconnect is never called and we could end up with active URBs for an unbound interface. This in turn could lead to deallocated memory being dereferenced in the completion callbacks. Fixes: ee467a1f ("USB: serial: add Moxa UPORT 12XX/14XX/16XX driver") Cc: stable <stable@vger.kernel.org> # v3.14 Signed-off-by:
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Johan Hovold authored
[ Upstream commit 35be1a71 ] The interface instat and indat URBs were submitted in attach, but never unlinked in release before deallocating the corresponding transfer buffers. In the case of a late probe error (e.g. due to failed minor allocation), disconnect would not have been called before release, causing the buffers to be freed while the URBs are still in use. We'd also end up with active URBs for an unbound interface. Fixes: f9c99bb8 ("USB: usb-serial: replace shutdown with disconnect, release") Cc: stable <stable@vger.kernel.org> # v2.6.31 Signed-off-by:
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Johan Hovold authored
[ Upstream commit c8d62957 ] URBs and buffers allocated in attach for Epic devices would never be deallocated in case of a later probe error (e.g. failure to allocate minor numbers) as disconnect is then never called. Fix by moving deallocation to release and making sure that the URBs are first unlinked. Fixes: f9c99bb8 ("USB: usb-serial: replace shutdown with disconnect, release") Cc: stable <stable@vger.kernel.org> # v2.6.31 Signed-off-by:
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Johan Hovold authored
[ Upstream commit c5c0c555 ] Private data, URBs and buffers allocated for Epic devices during attach were never released on errors (e.g. missing endpoints). Fixes: 6e8cf775 ("USB: add EPIC support to the io_edgeport driver") Cc: stable <stable@vger.kernel.org> # v2.6.21 Signed-off-by:
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Roger Quadros authored
[ Upstream commit b49b927f ] We shouldn't be calling clk_prepare_enable()/clk_prepare_disable() in an atomic context. Fixes the following issue: [ 5.830970] ehci-omap: OMAP-EHCI Host Controller driver [ 5.830974] driver_register 'ehci-omap' [ 5.895849] driver_register 'wl1271_sdio' [ 5.896870] BUG: scheduling while atomic: udevd/994/0x00000002 [ 5.896876] 4 locks held by udevd/994: [ 5.896904] #0: (&dev->mutex){......}, at: [<c049597c>] __driver_attach+0x60/0xac [ 5.896923] #1: (&dev->mutex){......}, at: [<c049598c>] __driver_attach+0x70/0xac [ 5.896946] #2: (tll_lock){+.+...}, at: [<c04c2630>] omap_tll_enable+0x2c/0xd0 [ 5.896966] #3: (prepare_lock){+.+...}, at: [<c05ce9c8>] clk_prepare_lock+0x48/0xe0 [ 5.897042] Modules linked in: wlcore_sdio(+) ehci_omap(+) dwc3_omap snd_soc_ts3a225e leds_is31fl319x bq27xxx_battery_i2c tsc2007 bq27xxx_battery bq2429x_charger ina2xx tca8418_keypad as5013 leds_tca6507 twl6040_vibra gpio_twl6040 bmp085_i2c(+) palmas_gpadc usb3503 palmas_pwrbutton bmg160_i2c(+) bmp085 bma150(+) bmg160_core bmp280 input_polldev snd_soc_omap_mcbsp snd_soc_omap_mcpdm snd_soc_omap snd_pcm_dmaengine [ 5.897048] Preemption disabled at:[< (null)>] (null) [ 5.897051] [ 5.897059] CPU: 0 PID: 994 Comm: udevd Not tainted 4.6.0-rc5-letux+ #233 [ 5.897062] Hardware name: Generic OMAP5 (Flattened Device Tree) [ 5.897076] [<c010e714>] (unwind_backtrace) from [<c010af34>] (show_stack+0x10/0x14) [ 5.897087] [<c010af34>] (show_stack) from [<c040aa7c>] (dump_stack+0x88/0xc0) [ 5.897099] [<c040aa7c>] (dump_stack) from [<c020c558>] (__schedule_bug+0xac/0xd0) [ 5.897111] [<c020c558>] (__schedule_bug) from [<c06f3d44>] (__schedule+0x88/0x7e4) [ 5.897120] [<c06f3d44>] (__schedule) from [<c06f46d8>] (schedule+0x9c/0xc0) [ 5.897129] [<c06f46d8>] (schedule) from [<c06f4904>] (schedule_preempt_disabled+0x14/0x20) [ 5.897140] [<c06f4904>] (schedule_preempt_disabled) from [<c06f64e4>] (mutex_lock_nested+0x258/0x43c) [ 5.897150] [<c06f64e4>] (mutex_lock_nested) from [<c05ce9c8>] (clk_prepare_lock+0x48/0xe0) [ 5.897160] [<c05ce9c8>] (clk_prepare_lock) from [<c05d0e7c>] (clk_prepare+0x10/0x28) [ 5.897169] [<c05d0e7c>] (clk_prepare) from [<c04c2668>] (omap_tll_enable+0x64/0xd0) [ 5.897180] [<c04c2668>] (omap_tll_enable) from [<c04c1728>] (usbhs_runtime_resume+0x18/0x17c) [ 5.897192] [<c04c1728>] (usbhs_runtime_resume) from [<c049d404>] (pm_generic_runtime_resume+0x2c/0x40) [ 5.897202] [<c049d404>] (pm_generic_runtime_resume) from [<c049f180>] (__rpm_callback+0x38/0x68) [ 5.897210] [<c049f180>] (__rpm_callback) from [<c049f220>] (rpm_callback+0x70/0x88) [ 5.897218] [<c049f220>] (rpm_callback) from [<c04a0a00>] (rpm_resume+0x4ec/0x7ec) [ 5.897227] [<c04a0a00>] (rpm_resume) from [<c04a0f48>] (__pm_runtime_resume+0x4c/0x64) [ 5.897236] [<c04a0f48>] (__pm_runtime_resume) from [<c04958dc>] (driver_probe_device+0x30/0x70) [ 5.897246] [<c04958dc>] (driver_probe_device) from [<c04959a4>] (__driver_attach+0x88/0xac) [ 5.897256] [<c04959a4>] (__driver_attach) from [<c04940f8>] (bus_for_each_dev+0x50/0x84) [ 5.897267] [<c04940f8>] (bus_for_each_dev) from [<c0494e40>] (bus_add_driver+0xcc/0x1e4) [ 5.897276] [<c0494e40>] (bus_add_driver) from [<c0496914>] (driver_register+0xac/0xf4) [ 5.897286] [<c0496914>] (driver_register) from [<c01018e0>] (do_one_initcall+0x100/0x1b8) [ 5.897296] [<c01018e0>] (do_one_initcall) from [<c01c7a54>] (do_init_module+0x58/0x1c0) [ 5.897304] [<c01c7a54>] (do_init_module) from [<c01c8a3c>] (SyS_finit_module+0x88/0x90) [ 5.897313] [<c01c8a3c>] (SyS_finit_module) from [<c0107120>] (ret_fast_syscall+0x0/0x1c) [ 5.912697] ------------[ cut here ]------------ [ 5.912711] WARNING: CPU: 0 PID: 994 at kernel/sched/core.c:2996 _raw_spin_unlock+0x28/0x58 [ 5.912717] DEBUG_LOCKS_WARN_ON(val > preempt_count()) Cc: <stable@vger.kernel.org> Reported-by:
H. Nikolaus Schaller <hns@goldelico.com> Tested-by:
Roger Quadros <rogerq@ti.com> Signed-off-by:
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- 04 Jun, 2016 1 commit
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Leonid Yegoshin authored
[ Upstream commit 41fa29e4 ] Error recovery pointers for fixups was improperly set as ".word" which is unsuitable for MIPS64. Replaced by STR(PTR) [ralf@linux-mips.org: Apply changes as requested in the review process.] Signed-off-by:
Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Reviewed-by:
Markos Chandras <markos.chandras@imgtec.com> Fixes: b0a668fb ("MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6") Cc: macro@linux-mips.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Cc: <stable@vger.kernel.org> # 4.0+ Patchwork: https://patchwork.linux-mips.org/patch/9911/Signed-off-by:
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- 03 Jun, 2016 18 commits
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James Hogan authored
[ Upstream commit 81a76d71 ] When showing backtraces in response to traps, for example crashes and address errors (usually unaligned accesses) when they are set in debugfs to be reported, unwind_stack will be used if the PC was in the kernel text address range. However since EVA it is possible for user and kernel address ranges to overlap, and even without EVA userland can still trigger an address error by jumping to a KSeg0 address. Adjust the check to also ensure that it was running in kernel mode. I don't believe any harm can come of this problem, since unwind_stack() is sufficiently defensive, however it is only meant for unwinding kernel code, so to be correct it should use the raw backtracing instead. Signed-off-by:
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James Hogan authored
[ Upstream commit a816b306 ] When unwinding through IRQs and exceptions, the unwinding only continues if the PC is a kernel text address, however since EVA it is possible for user and kernel address ranges to overlap, potentially allowing unwinding to continue to user mode if the user PC happens to be in the kernel text address range. Adjust the check to also ensure that the register state from before the exception is actually running in kernel mode, i.e. !user_mode(regs). I don't believe any harm can come of this problem, since the PC is only output, the stack pointer is checked to ensure it resides within the task's stack page before it is dereferenced in search of the return address, and the return address register is similarly only output (if the PC is in a leaf function or the beginning of a non-leaf function). However unwind_stack() is only meant for unwinding kernel code, so to be correct the unwind should stop there. Signed-off-by:
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James Hogan authored
[ Upstream commit 5daebc47 ] Commit 85efde6f ("make exported headers use strict posix types") changed the asm-generic siginfo.h to use the __kernel_* types, and commit 3a471cbc ("remove __KERNEL_STRICT_NAMES") make the internal types accessible only to the kernel, but the MIPS implementation hasn't been updated to match. Switch to proper types now so that the exported asm/siginfo.h won't produce quite so many compiler errors when included alone by a user program. Signed-off-by:
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Oliver Hartkopp authored
[ Upstream commit bb208f14 ] As described in 'can: m_can: tag current CAN FD controllers as non-ISO' (6cfda7fb) it is possible to define fixed configuration options by setting the according bit in 'ctrlmode' and clear it in 'ctrlmode_supported'. This leads to the incovenience that the fixed configuration bits can not be passed by netlink even when they have the correct values (e.g. non-ISO, FD). This patch fixes that issue and not only allows fixed set bit values to be set again but now requires(!) to provide these fixed values at configuration time. A valid CAN FD configuration consists of a nominal/arbitration bittiming, a data bittiming and a control mode with CAN_CTRLMODE_FD set - which is now enforced by a new can_validate() function. This fix additionally removed the inconsistency that was prohibiting the support of 'CANFD-only' controller drivers, like the RCar CAN FD. For this reason a new helper can_set_static_ctrlmode() has been introduced to provide a proper interface to handle static enabled CAN controller options. Reported-by:
Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Signed-off-by:
Oliver Hartkopp <socketcan@hartkopp.net> Reviewed-by:
Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by:
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Catalin Marinas authored
[ Upstream commit 5bb1cc0f ] Currently, pmd_present() only checks for a non-zero value, returning true even after pmd_mknotpresent() (which only clears the type bits). This patch converts pmd_present() to using pte_present(), similar to the other pmd_*() checks. As a side effect, it will return true for PROT_NONE mappings, though they are not yet used by the kernel with transparent huge pages. For consistency, also change pmd_mknotpresent() to only clear the PMD_SECT_VALID bit, even though the PMD_TABLE_BIT is already 0 for block mappings (no functional change). The unused PMD_SECT_PROT_NONE definition is removed as transparent huge pages use the pte page prot values. Fixes: 9c7e535f ("arm64: mm: Route pmd thp functions through pte equivalents") Cc: <stable@vger.kernel.org> # 3.15+ Reviewed-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Nicolai Stange authored
[ Upstream commit 935244cd ] Currently, in ext4_mb_init(), there's a loop like the following: do { ... offset += 1 << (sb->s_blocksize_bits - i); i++; } while (i <= sb->s_blocksize_bits + 1); Note that the updated offset is used in the loop's next iteration only. However, at the last iteration, that is at i == sb->s_blocksize_bits + 1, the shift count becomes equal to (unsigned)-1 > 31 (c.f. C99 6.5.7(3)) and UBSAN reports UBSAN: Undefined behaviour in fs/ext4/mballoc.c:2621:15 shift exponent 4294967295 is too large for 32-bit type 'int' [...] Call Trace: [<ffffffff818c4d25>] dump_stack+0xbc/0x117 [<ffffffff818c4c69>] ? _atomic_dec_and_lock+0x169/0x169 [<ffffffff819411ab>] ubsan_epilogue+0xd/0x4e [<ffffffff81941cac>] __ubsan_handle_shift_out_of_bounds+0x1fb/0x254 [<ffffffff81941ab1>] ? __ubsan_handle_load_invalid_value+0x158/0x158 [<ffffffff814b6dc1>] ? kmem_cache_alloc+0x101/0x390 [<ffffffff816fc13b>] ? ext4_mb_init+0x13b/0xfd0 [<ffffffff814293c7>] ? create_cache+0x57/0x1f0 [<ffffffff8142948a>] ? create_cache+0x11a/0x1f0 [<ffffffff821c2168>] ? mutex_lock+0x38/0x60 [<ffffffff821c23ab>] ? mutex_unlock+0x1b/0x50 [<ffffffff814c26ab>] ? put_online_mems+0x5b/0xc0 [<ffffffff81429677>] ? kmem_cache_create+0x117/0x2c0 [<ffffffff816fcc49>] ext4_mb_init+0xc49/0xfd0 [...] Observe that the mentioned shift exponent, 4294967295, equals (unsigned)-1. Unless compilers start to do some fancy transformations (which at least GCC 6.0.0 doesn't currently do), the issue is of cosmetic nature only: the such calculated value of offset is never used again. Silence UBSAN by introducing another variable, offset_incr, holding the next increment to apply to offset and adjust that one by right shifting it by one position per loop iteration. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=114701 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=112161 Cc: stable@vger.kernel.org Signed-off-by:
Nicolai Stange <nicstange@gmail.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Nicolai Stange authored
[ Upstream commit b5cb316c ] Currently, in mb_find_order_for_block(), there's a loop like the following: while (order <= e4b->bd_blkbits + 1) { ... bb += 1 << (e4b->bd_blkbits - order); } Note that the updated bb is used in the loop's next iteration only. However, at the last iteration, that is at order == e4b->bd_blkbits + 1, the shift count becomes negative (c.f. C99 6.5.7(3)) and UBSAN reports UBSAN: Undefined behaviour in fs/ext4/mballoc.c:1281:11 shift exponent -1 is negative [...] Call Trace: [<ffffffff818c4d35>] dump_stack+0xbc/0x117 [<ffffffff818c4c79>] ? _atomic_dec_and_lock+0x169/0x169 [<ffffffff819411bb>] ubsan_epilogue+0xd/0x4e [<ffffffff81941cbc>] __ubsan_handle_shift_out_of_bounds+0x1fb/0x254 [<ffffffff81941ac1>] ? __ubsan_handle_load_invalid_value+0x158/0x158 [<ffffffff816e93a0>] ? ext4_mb_generate_from_pa+0x590/0x590 [<ffffffff816502c8>] ? ext4_read_block_bitmap_nowait+0x598/0xe80 [<ffffffff816e7b7e>] mb_find_order_for_block+0x1ce/0x240 [...] Unless compilers start to do some fancy transformations (which at least GCC 6.0.0 doesn't currently do), the issue is of cosmetic nature only: the such calculated value of bb is never used again. Silence UBSAN by introducing another variable, bb_incr, holding the next increment to apply to bb and adjust that one by right shifting it by one position per loop iteration. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=114701 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=112161 Cc: stable@vger.kernel.org Signed-off-by:
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Jan Kara authored
[ Upstream commit 74177f55 ] When filesystem is corrupted in the right way, it can happen ext4_mark_iloc_dirty() in ext4_orphan_add() returns error and we subsequently remove inode from the in-memory orphan list. However this deletion is done with list_del(&EXT4_I(inode)->i_orphan) and thus we leave i_orphan list_head with a stale content. Later we can look at this content causing list corruption, oops, or other issues. The reported trace looked like: WARNING: CPU: 0 PID: 46 at lib/list_debug.c:53 __list_del_entry+0x6b/0x100() list_del corruption, 0000000061c1d6e0->next is LIST_POISON1 0000000000100100) CPU: 0 PID: 46 Comm: ext4.exe Not tainted 4.1.0-rc4+ #250 Stack: 60462947 62219960 602ede24 62219960 602ede24 603ca293 622198f0 602f02eb 62219950 6002c12c 62219900 601b4d6b Call Trace: [<6005769c>] ? vprintk_emit+0x2dc/0x5c0 [<602ede24>] ? printk+0x0/0x94 [<600190bc>] show_stack+0xdc/0x1a0 [<602ede24>] ? printk+0x0/0x94 [<602ede24>] ? printk+0x0/0x94 [<602f02eb>] dump_stack+0x2a/0x2c [<6002c12c>] warn_slowpath_common+0x9c/0xf0 [<601b4d6b>] ? __list_del_entry+0x6b/0x100 [<6002c254>] warn_slowpath_fmt+0x94/0xa0 [<602f4d09>] ? __mutex_lock_slowpath+0x239/0x3a0 [<6002c1c0>] ? warn_slowpath_fmt+0x0/0xa0 [<60023ebf>] ? set_signals+0x3f/0x50 [<600a205a>] ? kmem_cache_free+0x10a/0x180 [<602f4e88>] ? mutex_lock+0x18/0x30 [<601b4d6b>] __list_del_entry+0x6b/0x100 [<601177ec>] ext4_orphan_del+0x22c/0x2f0 [<6012f27c>] ? __ext4_journal_start_sb+0x2c/0xa0 [<6010b973>] ? ext4_truncate+0x383/0x390 [<6010bc8b>] ext4_write_begin+0x30b/0x4b0 [<6001bb50>] ? copy_from_user+0x0/0xb0 [<601aa840>] ? iov_iter_fault_in_readable+0xa0/0xc0 [<60072c4f>] generic_perform_write+0xaf/0x1e0 [<600c4166>] ? file_update_time+0x46/0x110 [<60072f0f>] __generic_file_write_iter+0x18f/0x1b0 [<6010030f>] ext4_file_write_iter+0x15f/0x470 [<60094e10>] ? unlink_file_vma+0x0/0x70 [<6009b180>] ? unlink_anon_vmas+0x0/0x260 [<6008f169>] ? free_pgtables+0xb9/0x100 [<600a6030>] __vfs_write+0xb0/0x130 [<600a61d5>] vfs_write+0xa5/0x170 [<600a63d6>] SyS_write+0x56/0xe0 [<6029fcb0>] ? __libc_waitpid+0x0/0xa0 [<6001b698>] handle_syscall+0x68/0x90 [<6002633d>] userspace+0x4fd/0x600 [<6002274f>] ? save_registers+0x1f/0x40 [<60028bd7>] ? arch_prctl+0x177/0x1b0 [<60017bd5>] fork_handler+0x85/0x90 Fix the problem by using list_del_init() as we always should with i_orphan list. CC: stable@vger.kernel.org Reported-by:
Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Konstantin Shkolnyy authored
[ Upstream commit a377f9e9 ] A bug in the CRTSCTS handling caused RTS to alternate between CRTSCTS=0 => "RTS is transmit active signal" and CRTSCTS=1 => "RTS is used for receive flow control" instead of CRTSCTS=0 => "RTS is statically active" and CRTSCTS=1 => "RTS is used for receive flow control" This only happened after first having enabled CRTSCTS. Signed-off-by:
Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> Fixes: 39a66b8d ("[PATCH] USB: CP2101 Add support for flow control") Cc: stable <stable@vger.kernel.org> [johan: reword commit message ] Signed-off-by:
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Konstantin Shkolnyy authored
[ Upstream commit e2ae67a3 ] This change is preparation for implementing a cp2108 bug workaround. The workaround requires storing some private data. Right now the data is attached to the USB interface and allocated in the attach() callback. The bug detection requires USB I/O which is done easier from port_probe() callback rather than attach(). Since the USB access functions take port as a parameter, and since the private data is used exclusively by these functions, it can be allocated in port_probe(). Also, all cp210x devices have exactly 1 port per USB iterface, so moving private data from the USB interface to port is trivial. Signed-off-by:
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Lv Zheng authored
[ Upstream commit 30c9bb0d ] The order of the _OSI related functionalities is as follows: acpi_blacklisted() acpi_dmi_osi_linux() acpi_osi_setup() acpi_osi_setup() acpi_update_interfaces() if "!*" <<<<<<<<<<<<<<<<<<<<<<<< parse_args() __setup("acpi_osi=") acpi_osi_setup_linux() acpi_update_interfaces() if "!*" <<<<<<<<<<<<<<<<<<<<<<<< acpi_early_init() acpi_initialize_subsystem() acpi_ut_initialize_interfaces() ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ acpi_bus_init() acpi_os_initialize1() acpi_install_interface_handler(acpi_osi_handler) acpi_osi_setup_late() acpi_update_interfaces() for "!" >>>>>>>>>>>>>>>>>>>>>>>> acpi_osi_handler() Since acpi_osi_setup_linux() can override acpi_dmi_osi_linux(), the command line setting can override the DMI detection. That's why acpi_blacklisted() is put before __setup("acpi_osi="). Then we can notice the following wrong invocation order. There are acpi_update_interfaces() (marked by <<<<) calls invoked before acpi_ut_initialize_interfaces() (marked by ^^^^). This makes it impossible to use acpi_osi=!* correctly from OSI DMI table or from the command line. The use of acpi_osi=!* is meant to disable both ACPICA (acpi_gbl_supported_interfaces) and Linux specific strings (osi_setup_entries) while the ACPICA part should have stopped working because of the order issue. This patch fixes this issue by moving acpi_update_interfaces() to where it is invoked for acpi_osi=! (marked by >>>>) as this is ensured to be invoked after acpi_ut_initialize_interfaces() (marked by ^^^^). Linux specific strings are still handled in the original place in order to make the following command line working: acpi_osi=!* acpi_osi="Module Device". Note that since acpi_osi=!* is meant to further disable linux specific string comparing to the acpi_osi=!, there is no such use case in our bug fixing work and hence there is no one using acpi_osi=!* either from the command line or from the DMI quirks, this issue is just a theoretical issue. Fixes: 741d8128 (ACPI: Add facility to remove all _OSI strings) Cc: 3.12+ <stable@vger.kernel.org> # 3.12+ Tested-by:
Lukas Wunner <lukas@wunner.de> Tested-by:
Chen Yu <yu.c.chen@intel.com> Signed-off-by:
Lv Zheng <lv.zheng@intel.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Lei Liu authored
[ Upstream commit 74d2a91a ] Add even more ZTE device ids. Signed-off-by:
lei liu <liu.lei78@zte.com.cn> Cc: stable <stable@vger.kernel.org> [johan: rebase and replace commit message ] Signed-off-by:
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lei liu authored
[ Upstream commit f0d09463 ] More ZTE device ids. Signed-off-by:
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Andreas Werner authored
[ Upstream commit f75564d3 ] The bar number is found in reg2 within the gdd. Therefore we need to change the assigment from reg1 to reg2 which is the correct location. Signed-off-by:
Andreas Werner <andreas.werner@men.de> Fixes: '3764e82e' drivers: Introduce MEN Chameleon Bus Cc: stable@vger.kernel.org # v3.15+ Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
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Mathias Nyman authored
[ Upstream commit cdc77c82 ] The current implemenentation restart the sent pattern for each entry in the sg list. The receiving end expects a continuous pattern, and test will fail unless scatterilst entries happen to be aligned with the pattern Fix this by calculating the pattern byte based on total sent size instead of just the current sg entry. Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Fixes: 8b524901 ("[PATCH] USB: usbtest: scatterlist OUT data pattern testing") Cc: <stable@vger.kernel.org> # v2.6.18+ Acked-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Alan Stern authored
[ Upstream commit b9a6e8e1 ] With this change, the host and gadget doesn't need to agree with transfer length for comparing the data, since they doesn't know each other's transfer size, but know max packet size. Signed-off-by:
Peter Chen <peter.chen@freescale.com> Acked-by:
Michal Nazarewicz <mina86@mina86.com> (Fixed the 'line over 80 characters warning' by Peter Chen) Tested-by:
Felipe Balbi <balbi@ti.com> Signed-off-by:
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Alan Stern authored
[ Upstream commit 6fb650d4 ] When a USB driver is bound to an interface (either through probing or by claiming it) or is unbound from an interface, the USB core always disables Link Power Management during the transition and then re-enables it afterward. The reason is because the driver might want to prevent hub-initiated link power transitions, in which case the HCD would have to recalculate the various LPM parameters. This recalculation takes place when LPM is re-enabled and the new parameters are sent to the device and its parent hub. However, if the driver does not want to prevent hub-initiated link power transitions then none of this work is necessary. The parameters don't need to be recalculated, and LPM doesn't need to be disabled and re-enabled. It turns out that disabling and enabling LPM can be time-consuming, enough so that it interferes with user programs that want to claim and release interfaces rapidly via usbfs. Since the usbfs kernel driver doesn't set the disable_hub_initiated_lpm flag, we can speed things up and get the user programs to work by leaving LPM alone whenever the flag isn't set. And while we're improving the way disable_hub_initiated_lpm gets used, let's also fix its kerneldoc. Signed-off-by:
Matthew Giassa <matthew@giassa.net> CC: Mathias Nyman <mathias.nyman@intel.com> CC: <stable@vger.kernel.org> Signed-off-by:
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Schemmel Hans-Christoph authored
[ Upstream commit 444f94e9 ] Added support for Gemalto's Cinterion PH8 and AHxx products with 2 RmNet Interfaces and products with 1 RmNet + 1 USB Audio interface. In addition some minor renaming and formatting. Signed-off-by:
Hans-Christoph Schemmel <hans-christoph.schemmel@gemalto.com> [johan: sort current entries and trim trailing whitespace ] Cc: stable <stable@vger.kernel.org> Signed-off-by:
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