- 05 Oct, 2014 40 commits
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Will Deacon authored
commit 27d7ff27 upstream. I'm not sure what I was on when I wrote this, but when iterating over the hardware watchpoint array (hbp_watch_array), our index is off by ARM_MAX_BRP, so we walk off the end of our thread_struct... ... except, a dodgy condition in the loop means that it never executes at all (bp cannot be NULL). This patch fixes the code so that we remove the bp check and use the correct index for accessing the watchpoint structures. Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Josef Bacik authored
commit 4ce97dbf upstream. Epoll on trace_pipe can sometimes hang in a weird case. If the ring buffer is empty when we set waiters_pending but an event shows up exactly at that moment we can miss being woken up by the ring buffers irq work. Since ring_buffer_empty() is inherently racey we will sometimes think that the buffer is not empty. So we don't get woken up and we don't think there are any events even though there were some ready when we added the watch, which makes us hang. This patch fixes this by making sure that we are actually on the wait list before we set waiters_pending, and add a memory barrier to make sure ring_buffer_empty() is going to be correct. Link: http://lkml.kernel.org/p/1408989581-23727-1-git-send-email-jbacik@fb.com Cc: Martin Lau <kafai@fb.com> Signed-off-by:
Josef Bacik <jbacik@fb.com> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Fan Du authored
commit 979bbf7b upstream. In block write mode, when encapsulating dma_buffer, first element is 'command', the rest is data buffer, so only copy actual data buffer starting from block[1] with the size indicating by block[0]. Signed-off-by:
Fan Du <fan.du@intel.com> Acked-by:
Neil Horman <nhorman@tuxdriver.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Simon Lindgren authored
commit 6721f28a upstream. There is a race condition in at91_do_twi_xfer when signals arrive. If a signal is recieved while waiting for a transfer to complete wait_for_completion_interruptible_timeout() will return -ERESTARTSYS. This is not handled correctly resulting in interrupts still being enabled and a transfer being in flight when we return. Symptoms include a range of oopses and bus lockups. Oopses can happen when the transfer completes because the interrupt handler will corrupt the stack. If a new transfer is started before the interrupt fires the controller will start a new transfer in the middle of the old one, resulting in confused slaves and a locked bus. To avoid this, use wait_for_completion_io_timeout instead so that we don't have to deal with gracefully shutting down the transfer and disabling the interrupts. Signed-off-by:
Simon Lindgren <simon@aqwary.com> Acked-by:
Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by:
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Marek Roszko authored
commit 75b81f33 upstream. The driver was not bound checking the received length byte to ensure it was within the the buffer size that is allocated for SMBus blocks. This resulted in buffer overflows whenever an invalid length byte was received. It also failed to ensure the length byte was not zero. If it received zero, it would end up in an infinite loop as the at91_twi_read_next_byte function returned immediately without allowing RHR to be read to clear the RXRDY interrupt. Tested agaisnt a SMBus compliant battery. Signed-off-by:
Marek Roszko <mark.roszko@gmail.com> Acked-by:
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Chen-Yu Tsai authored
commit 0ce4bc1d upstream. The "clock-frequency" DT property is listed as optional, However, the current code stores the return value of of_property_read_u32 in the return code of mv64xxx_of_config, but then forgets to clear it after setting the default value of "clock-frequency". It is then passed out to the main probe function, resulting in a probe failure when "clock-frequency" is missing. This patch checks and then throws away the return value of of_property_read_u32, instead of storing it and having to clear it afterwards. This issue was discovered after the property was removed from all sunxi DTs. Fixes: 4c730a06 ("i2c: mv64xxx: Set bus frequency to 100kHz if clock-frequency is not provided") Signed-off-by:
Chen-Yu Tsai <wens@csie.org> Acked-by:
Andrew Lunn <andrew@lunn.ch> Acked-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Pranavkumar Sawargaonkar authored
commit f6edbbf3 upstream. X-Gene u-boot runs in EL2 mode with MMU enabled hence we might have stale EL2 tlb enteris when we enable EL2 MMU on each host CPU. This can happen on any ARM/ARM64 board running bootloader in Hyp-mode (or EL2-mode) with MMU enabled. This patch ensures that we flush all Hyp-mode (or EL2-mode) TLBs on each host CPU before enabling Hyp-mode (or EL2-mode) MMU. Tested-by:
Mark Rutland <mark.rutland@arm.com> Reviewed-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Signed-off-by:
Anup Patel <anup.patel@linaro.org> Signed-off-by:
Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by:
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Christoffer Dall authored
commit 05e0127f upstream. The architecture specifies that when the processor wakes up from a WFE or WFI instruction, the instruction is considered complete, however we currrently return to EL1 (or EL0) at the WFI/WFE instruction itself. While most guests may not be affected by this because their local exception handler performs an exception returning setting the event bit or with an interrupt pending, some guests like UEFI will get wedged due this little mishap. Simply skip the instruction when we have completed the emulation. Acked-by:
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Sudeep Holla authored
commit 3d8afe30 upstream. The arm64 interrupt migration code on cpu offline calls irqchip.irq_set_affinity() with the argument force=true. Originally this argument had no effect because it was not used by any interrupt chip driver and there was no semantics defined. This changed with commit 01f8fa4f ("genirq: Allow forcing cpu affinity of interrupts") which made the force argument useful to route interrupts to not yet online cpus without checking the target cpu against the cpu online mask. The following commit ffde1de6 ("irqchip: gic: Support forced affinity setting") implemented this for the GIC interrupt controller. As a consequence the cpu offline irq migration fails if CPU0 is offlined, because CPU0 is still set in the affinity mask and the validation against cpu online mask is skipped to the force argument being true. The following first_cpu(mask) selection always selects CPU0 as the target. Commit 601c9421("arm64: use cpu_online_mask when using forced irq_set_affinity") intended to fix the above mentioned issue but introduced another issue where affinity can be migrated to a wrong CPU due to unconditional copy of cpu_online_mask. As with for arm, solve the issue by calling irq_set_affinity() with force=false from the CPU offline irq migration code so the GIC driver validates the affinity mask against CPU online mask and therefore removes CPU0 from the possible target candidates. Also revert the changes done in the commit 601c9421 as it's no longer needed. Tested on Juno platform. Fixes: 601c9421("arm64: use cpu_online_mask when using forced irq_set_affinity") Signed-off-by:
Sudeep Holla <sudeep.holla@arm.com> Acked-by:
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Will Deacon authored
commit eb35bdd7 upstream. Nathan reports that we leak TLS information from the parent context during an exec, as we don't clear the TLS registers when flushing the thread state. This patch updates the flushing code so that we: (1) Unconditionally zero the tpidr_el0 register (since this is fully context switched for native tasks and zeroed for compat tasks) (2) Zero the tp_value state in thread_info before clearing the tpidrr0_el0 register for compat tasks (since this is only writable by the set_tls compat syscall and therefore not fully switched). A missing compiler barrier is also added to the compat set_tls syscall. Acked-by:
Nathan Lynch <Nathan_Lynch@mentor.com> Reported-by:
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Jeff Moyer authored
commit 2ff396be upstream. We ran into a case on ppc64 running mariadb where io_getevents would return zeroed out I/O events. After adding instrumentation, it became clear that there was some missing synchronization between reading the tail pointer and the events themselves. This small patch fixes the problem in testing. Thanks to Zach for helping to look into this, and suggesting the fix. Signed-off-by:
Jeff Moyer <jmoyer@redhat.com> Signed-off-by:
Benjamin LaHaise <bcrl@kvack.org> Signed-off-by:
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Benjamin LaHaise authored
commit d856f32a upstream. As reported by Dan Aloni, commit f8567a38 ("aio: fix aio request leak when events are reaped by userspace") introduces a regression when user code attempts to perform io_submit() with more events than are available in the ring buffer. Reverting that commit would reintroduce a regression when user space event reaping is used. Fixing this bug is a bit more involved than the previous attempts to fix this regression. Since we do not have a single point at which we can count events as being reaped by user space and io_getevents(), we have to track event completion by looking at the number of events left in the event ring. So long as there are as many events in the ring buffer as there have been completion events generate, we cannot call put_reqs_available(). The code to check for this is now placed in refill_reqs_available(). A test program from Dan and modified by me for verifying this bug is available at http://www.kvack.org/~bcrl/20140824-aio_bug.c . Reported-by:
Dan Aloni <dan@kernelim.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Anton Blanchard authored
commit cbd52281 upstream. Hidden away in the last 8 bytes of the buffer_list page is a solitary statistic. It needs to be byte swapped or else ethtool -S will produce numbers that terrify the user. Since we do this in multiple places, create a helper function with a comment explaining what is going on. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Murali Karicheri authored
commit c5edfff9 upstream. Keystone K2E EVM uses Marvel 0x9182 controller. This requires support for the ID in the ahci driver. Signed-off-by:
Murali Karicheri <m-karicheri2@ti.com> Signed-off-by:
Tejun Heo <tj@kernel.org> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by:
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James Ralston authored
commit 1b071a09 upstream. This patch adds the AHCI mode SATA Device IDs for the Intel 9 Series PCH. Signed-off-by:
James Ralston <james.d.ralston@intel.com> Signed-off-by:
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Arjun Sreedharan authored
commit 4dc7c76c upstream. scc_bus_softreset not necessarily should return zero. Propagate the error code. Signed-off-by:
Arjun Sreedharan <arjun024@gmail.com> Signed-off-by:
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Tejun Heo authored
commit 2a13772a upstream. Crucial M550 may cause data corruption on queued trims and is blacklisted. The pattern used for it fails to match 1TB one as the capacity section will be four chars instead of three. Widen the pattern. Signed-off-by:
Charles Reiss <woggling@gmail.com> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81071Signed-off-by:
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Florian Fainelli authored
commit a9ecdc0f upstream. In case the Device Tree blob passed by the boot agent supplies both an 'interrupts-extended' and an 'interrupts' property in order to allow for older kernels to be usable, prefer the new-style 'interrupts-extended' property which conveys a lot more information. This allows us to have bootloaders willingly maintaining backwards compatibility with older kernels without entirely deprecating the 'interrupts' property. Update the bindings documentation to describe a situation where both the 'interrupts-extended' and the 'interrupts' property are present, and which one takes precedence over the other. Acked-by:
Rob Herring <robh@kernel.org> Signed-off-by:
Brian Norris <computersforpeace@gmail.com> Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
Grant Likely <grant.likely@linaro.org> Signed-off-by:
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Alex Deucher authored
commit 730a336c upstream. There still seem to be stability problems with other systems. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=72921Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Alex Deucher authored
commit 0c78a449 upstream. bapm enabled the GPU and CPU to share TDP headroom. It was disabled by default since some laptops hung when it was enabled in conjunction with dpm. It seems to be stable on desktop boards and fixes hangs on boot with dpm enabled on certain boards, so enable it by default on desktop boards. bug: https://bugs.freedesktop.org/show_bug.cgi?id=72921Signed-off-by:
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Jiri Kosina authored
commit ece4a17d upstream. Withtout this, ring initialization fails reliabily during resume with [drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head ffffff8804 tail 00000000 start 000e4000 This is not a complete fix, but it is verified to make the ring initialization failures during resume much less likely. We were not able to root-cause this bug (likely HW-specific to Gen4 chips) yet. This is therefore used as a ducttape before problem is fully understood and proper fix created, so that people don't suffer from completely unusable systems in the meantime. The discussion and debugging is happening at https://bugs.freedesktop.org/show_bug.cgi?id=76554Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Alex Deucher authored
commit 3c64bd26 upstream. Return 2 so we can be sure the kernel has the necessary changes for acceleration to work. Note: This patch depends on these two commits: - drm/radeon: fix cut and paste issue for hawaii. - drm/radeon: use packet2 for nop on hawaii with old firmware Signed-off-by:
Andreas Boll <andreas.boll.dev@gmail.com> Signed-off-by:
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Alex Deucher authored
commit e9f274b2 upstream. Some hawaii boards use a different method for fetching the voltage information from the vbios. Signed-off-by:
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Christian König authored
commit f1d2a26b upstream. Seems to make VM flushes more stable on SI and CIK. v2: only use the PFP on the GFX ring on CIK Signed-off-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
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Alex Deucher authored
commit 5dc35532 upstream. Looks like the lm63 driver supports the lm64 as well. Signed-off-by:
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Alex Deucher authored
commit c08abf11 upstream. This patch depends on: e0792981 (drm/radeon/dpm: fix typo in vddci setup for eg/btc) bugs: https://bugs.freedesktop.org/show_bug.cgi?id=73053 https://bugzilla.kernel.org/show_bug.cgi?id=68571Signed-off-by:
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Alex Deucher authored
commit 8f500af4 upstream. This patch depends on: b0880e87 (drm/radeon/dpm: fix vddci setup typo on cayman) bug: https://bugs.freedesktop.org/show_bug.cgi?id=69723Signed-off-by:
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Alex Deucher authored
commit 6b57f20c upstream. Some hawaii cards use a different method to fetch the voltage info from the vbios. bug: https://bugs.freedesktop.org/show_bug.cgi?id=74250Signed-off-by:
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Tetsuo Handa authored
commit a91576d7 upstream. Commit 7dc19d5a "drivers: convert shrinkers to new count/scan API" added deadlock warnings that ttm_page_pool_free() and ttm_dma_page_pool_free() are currently doing GFP_KERNEL allocation. But these functions did not get updated to receive gfp_t argument. This patch explicitly passes sc->gfp_mask or GFP_KERNEL to these functions, and removes the deadlock warning. Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
Dave Airlie <airlied@redhat.com> Signed-off-by:
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Tetsuo Handa authored
commit 71336e01 upstream. While ttm_dma_pool_shrink_scan() tries to take mutex before doing GFP_KERNEL allocation, ttm_pool_shrink_scan() does not do it. This can result in stack overflow if kmalloc() in ttm_page_pool_free() triggered recursion due to memory pressure. shrink_slab() => ttm_pool_shrink_scan() => ttm_page_pool_free() => kmalloc(GFP_KERNEL) => shrink_slab() => ttm_pool_shrink_scan() => ttm_page_pool_free() => kmalloc(GFP_KERNEL) Change ttm_pool_shrink_scan() to do like ttm_dma_pool_shrink_scan() does. Signed-off-by:
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Tetsuo Handa authored
commit 22e71691 upstream. I can observe that RHEL7 environment stalls with 100% CPU usage when a certain type of memory pressure is given. While the shrinker functions are called by shrink_slab() before the OOM killer is triggered, the stall lasts for many minutes. One of reasons of this stall is that ttm_dma_pool_shrink_count()/ttm_dma_pool_shrink_scan() are called and are blocked at mutex_lock(&_manager->lock). GFP_KERNEL allocation with _manager->lock held causes someone (including kswapd) to deadlock when these functions are called due to memory pressure. This patch changes "mutex_lock();" to "if (!mutex_trylock()) return ...;" in order to avoid deadlock. Signed-off-by:
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Tetsuo Handa authored
commit 46c2df68 upstream. We can use "unsigned int" instead of "atomic_t" by updating start_pool variable under _manager->lock. This patch will make it possible to avoid skipping when choosing a pool to shrink in round-robin style, after next patch changes mutex_lock(_manager->lock) to !mutex_trylock(_manager->lork). Signed-off-by:
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Tetsuo Handa authored
commit 11e504cc upstream. list_empty(&_manager->pools) being false before taking _manager->lock does not guarantee that _manager->npools != 0 after taking _manager->lock because _manager->npools is updated under _manager->lock. Signed-off-by:
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Guido Martínez authored
commit c9a3ad25 upstream. display_timings_release calls kfree on the display_timings object passed to it. Calling kfree after it is wrong. SLUB debug showed the following warning: ============================================================================= BUG kmalloc-64 (Tainted: G W ): Object already free ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Allocated in of_get_display_timings+0x2c/0x214 age=601 cpu=0 pid=884 __slab_alloc.constprop.79+0x2e0/0x33c kmem_cache_alloc+0xac/0xdc of_get_display_timings+0x2c/0x214 panel_probe+0x7c/0x314 [tilcdc] platform_drv_probe+0x18/0x48 [..snip..] INFO: Freed in panel_destroy+0x18/0x3c [tilcdc] age=0 cpu=0 pid=907 __slab_free+0x34/0x330 panel_destroy+0x18/0x3c [tilcdc] tilcdc_unload+0xd0/0x118 [tilcdc] drm_dev_unregister+0x24/0x98 [..snip..] Signed-off-by:
Guido Martínez <guido@vanguardiasur.com.ar> Tested-by:
Darren Etheridge <detheridge@ti.com> Signed-off-by:
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Guido Martínez authored
commit eb565a2b upstream. Unregister resources in the correct order on tilcdc_drm_fini, which is the reverse order they were registered during tilcdc_drm_init. This also means unregistering the driver before releasing its resources. Signed-off-by:
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Guido Martínez authored
commit 3a490122 upstream. The driver did not unregister the allocated framebuffer, which caused memory leaks (and memory manager WARNs) when unloading. Also, the framebuffer device under /dev still existed after unloading. Add a call to drm_fbdev_cma_fini when unloading the module to prevent both issues. Signed-off-by:
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Guido Martínez authored
commit 16dcbdef upstream. Add a drm_sysfs_connector_remove call when we destroy the panel to make sure the connector node in sysfs gets deleted. This is required for proper unload and re-load of this driver, otherwise we will get a warning about a duplicate filename in sysfs. Signed-off-by:
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Guido Martínez authored
commit daa15b4c upstream. Add a drm_sysfs_connector_remove call when we destroy the panel to make sure the connector node in sysfs gets deleted. This is required for proper unload and re-load of this driver as a module. Without this, we would get a warning at re-load time like so: tda998x 0-0070: found TDA19988 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 825 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x74() sysfs: cannot create duplicate filename '/class/drm/card0-HDMI-A-1' Modules linked in: [..] CPU: 0 PID: 825 Comm: modprobe Not tainted 3.15.0-rc4-00027-g9dcdef4 #82 [<c0013bb8>] (unwind_backtrace) from [<c0011824>] (show_stack+0x10/0x14) [<c0011824>] (show_stack) from [<c0034e8c>] (warn_slowpath_common+0x68/0x88) [<c0034e8c>] (warn_slowpath_common) from [<c0034edc>] (warn_slowpath_fmt+0x30/0x40) [<c0034edc>] (warn_slowpath_fmt) from [<c01243f4>] (sysfs_warn_dup+0x54/0x74) [<c01243f4>] (sysfs_warn_dup) from [<c0124708>] (sysfs_do_create_link_sd.isra.2+0xb0/0xb8) [<c0124708>] (sysfs_do_create_link_sd.isra.2) from [<c02ae37c>] (device_add+0x338/0x520) [<c02ae37c>] (device_add) from [<c02ae6e8>] (device_create_groups_vargs+0xa0/0xc4) [<c02ae6e8>] (device_create_groups_vargs) from [<c02ae758>] (device_create+0x24/0x2c) [<c02ae758>] (device_create) from [<c029b4ec>] (drm_sysfs_connector_add+0x64/0x204) [<c029b4ec>] (drm_sysfs_connector_add) from [<bf0b1b40>] (slave_modeset_init+0x120/0x1bc [tilcdc]) [<bf0b1b40>] (slave_modeset_init [tilcdc]) from [<bf0b2be8>] (tilcdc_load+0x214/0x4c0 [tilcdc]) [<bf0b2be8>] (tilcdc_load [tilcdc]) from [<c029955c>] (drm_dev_register+0xa4/0x104) [..snip..] ---[ end trace 4df8d614936ebdee ]--- [drm:drm_sysfs_connector_add] *ERROR* failed to register connector device: -17 Signed-off-by:
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Guido Martínez authored
commit e396900e upstream. Add a drm_sysfs_connector_remove call when we destroy the panel to make sure the connector node in sysfs gets deleted. This is required for proper unload and re-load of this driver as a module. Without this, we would get a warning at re-load time like so: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 824 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x74() sysfs: cannot create duplicate filename '/class/drm/card0-LVDS-1' Modules linked in: [...] CPU: 0 PID: 824 Comm: modprobe Not tainted 3.15.0-rc4-00027-g6484f96-dirty #81 [<c0013bb8>] (unwind_backtrace) from [<c0011824>] (show_stack+0x10/0x14) [<c0011824>] (show_stack) from [<c0034e8c>] (warn_slowpath_common+0x68/0x88) [<c0034e8c>] (warn_slowpath_common) from [<c0034edc>] (warn_slowpath_fmt+0x30/0x40) [<c0034edc>] (warn_slowpath_fmt) from [<c01243f4>] (sysfs_warn_dup+0x54/0x74) [<c01243f4>] (sysfs_warn_dup) from [<c0124708>] (sysfs_do_create_link_sd.isra.2+0xb0/0xb8) [<c0124708>] (sysfs_do_create_link_sd.isra.2) from [<c02ae37c>] (device_add+0x338/0x520) [<c02ae37c>] (device_add) from [<c02ae6e8>] (device_create_groups_vargs+0xa0/0xc4) [<c02ae6e8>] (device_create_groups_vargs) from [<c02ae758>] (device_create+0x24/0x2c) [<c02ae758>] (device_create) from [<c029b4ec>] (drm_sysfs_connector_add+0x64/0x204) [<c029b4ec>] (drm_sysfs_connector_add) from [<bf0b1fec>] (panel_modeset_init+0xb8/0x134 [tilcdc]) [<bf0b1fec>] (panel_modeset_init [tilcdc]) from [<bf0b2bf0>] (tilcdc_load+0x214/0x4c0 [tilcdc]) [<bf0b2bf0>] (tilcdc_load [tilcdc]) from [<c029955c>] (drm_dev_register+0xa4/0x104) [ .. snip .. ] ---[ end trace b2d09cd9578b0497 ]--- [drm:drm_sysfs_connector_add] *ERROR* failed to register connector device: -17 Signed-off-by:
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Ronald Wahl authored
commit 671796dd upstream. The driver assumes that endpoint 4 is always an interrupt endpoint. Unfortunately the type differs between high-speed and full-speed configurations while in the former case it is indeed an interrupt endpoint this is not true for the latter case - here it is a bulk endpoint. When sending URBs with the wrong type the kernel will generate a warning message including backtrace. In this specific case there will be a huge amount of warnings which can bring the system to freeze. To fix this we are now sending URBs to endpoint 4 using the type found in the endpoint descriptor. A side note: The carl9170 firmware currently specifies endpoint 4 as interrupt endpoint even in the full-speed configuration but this has no relevance because before this firmware is loaded the endpoint type is as described above and after the firmware is running the stick is not reenumerated and so the old descriptor is used. Signed-off-by:
Ronald Wahl <ronald.wahl@raritan.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
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