AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/gpu/drm/panfrost
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Rob Herring 0a9a4b611a drm/panfrost: Fix sleeping while atomic in panfrost_gem_open 
We can't hold the mm_lock spinlock as panfrost_mmu_map() can sleep:

BUG: sleeping function called from invalid context at kernel/locking/mutex.c:909
in_atomic(): 1, irqs_disabled(): 0, pid: 974, name: glmark2-es2-drm
1 lock held by glmark2-es2-drm/974:
CPU: 5 PID: 974 Comm: glmark2-es2-drm Tainted: G        W    L    5.3.0-rc1+ #94
Hardware name: 96boards Rock960 (DT)
Call trace:
 dump_backtrace+0x0/0x130
 show_stack+0x14/0x20
 dump_stack+0xc4/0x10c
 ___might_sleep+0x158/0x228
 __might_sleep+0x50/0x88
 __mutex_lock+0x58/0x800
 mutex_lock_interruptible_nested+0x1c/0x28
 drm_gem_shmem_get_pages+0x24/0xa0
 drm_gem_shmem_get_pages_sgt+0x48/0xd0
 panfrost_mmu_map+0x38/0xf8 [panfrost]
 panfrost_gem_open+0xc0/0xd8 [panfrost]
 drm_gem_handle_create_tail+0xe8/0x198
 drm_gem_handle_create+0x3c/0x50
 panfrost_gem_create_with_handle+0x70/0xa0 [panfrost]
 panfrost_ioctl_create_bo+0x48/0x80 [panfrost]
 drm_ioctl_kernel+0xb8/0x110
 drm_ioctl+0x244/0x3f0
 do_vfs_ioctl+0xbc/0x910
 ksys_ioctl+0x78/0xa8
 __arm64_sys_ioctl+0x1c/0x28
 el0_svc_common.constprop.0+0x90/0x168
 el0_svc_handler+0x28/0x78
 el0_svc+0x8/0xc

Fixes: a5efb4c9a5 ("drm/panfrost: Restructure the GEM object creation")
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190819161204.3106-5-robh@kernel.org
2019-08-22 20:44:19 -05:00
..
Kconfig drm/panfrost: Require the simple_ondemand governor 2019-06-10 09:30:34 -06:00
Makefile drm/panfrost: Add madvise and shrinker support 2019-08-08 15:57:36 -06:00
panfrost_devfreq.c drm/panfrost: Remove opp table when unloading 2019-08-19 11:38:51 -05:00
panfrost_devfreq.h drm/panfrost: Remove opp table when unloading 2019-08-19 11:38:51 -05:00
panfrost_device.c drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_device.h drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_drv.c drm/panfrost: Remove opp table when unloading 2019-08-19 11:38:51 -05:00
panfrost_features.h
panfrost_gem_shrinker.c drm/panfrost: Add madvise and shrinker support 2019-08-08 15:57:36 -06:00
panfrost_gem.c drm/panfrost: Fix sleeping while atomic in panfrost_gem_open 2019-08-22 20:44:19 -05:00
panfrost_gem.h drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_gpu.c drm/panfrost: Export all GPU feature registers 2019-07-25 16:10:52 -06:00
panfrost_gpu.h
panfrost_issues.h
panfrost_job.c drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_job.h
panfrost_mmu.c drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_mmu.h drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00
panfrost_perfcnt.c drm/panfrost: Expose performance counters through unstable ioctls 2019-06-18 09:23:48 -06:00
panfrost_perfcnt.h drm/panfrost: Expose performance counters through unstable ioctls 2019-06-18 09:23:48 -06:00
panfrost_regs.h drm/panfrost: Expose performance counters through unstable ioctls 2019-06-18 09:23:48 -06:00
TODO drm/panfrost: Implement per FD address spaces 2019-08-19 11:34:57 -05:00