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| /openbmc/linux/drivers/gpu/drm/i915/gt/ |
| H A D | intel_rps.c | ff345271 Mon Mar 09 06:36:23 CDT 2020 Chris Wilson <chris@chris-wilson.co.uk> drm/i915/gt: Mark up intel_rps.active for racy reads
We read the current state of intel_rps.active outside of the lock, so
mark up the racy access.
[ 525.037073] BUG: KCSAN: data-race in intel_rps_boost [i915] / intel_rps_park [i915]
[ 525.037091]
[ 525.037103] write to 0xffff8881f145efa1 of 1 bytes by task 192 on cpu 2:
[ 525.037331] intel_rps_park+0x72/0x230 [i915]
[ 525.037552] __gt_park+0x61/0xa0 [i915]
[ 525.037771] ____intel_wakeref_put_last+0x42/0x90 [i915]
[ 525.037991] __intel_wakeref_put_work+0xd3/0xf0 [i915]
[ 525.038008] process_one_work+0x3b1/0x690
[ 525.038022] worker_thread+0x80/0x670
[ 525.038037] kthread+0x19a/0x1e0
[ 525.038051] ret_from_fork+0x1f/0x30
[ 525.038062]
[ 525.038074] read to 0xffff8881f145efa1 of 1 bytes by task 733 on cpu 3:
[ 525.038304] intel_rps_boost+0x67/0x1f0 [i915]
[ 525.038535] i915_request_wait+0x562/0x5d0 [i915]
[ 525.038764] i915_gem_object_wait_fence+0x81/0xa0 [i915]
[ 525.038994] i915_gem_object_wait_reservation+0x489/0x520 [i915]
[ 525.039224] i915_gem_wait_ioctl+0x167/0x2b0 [i915]
[ 525.039241] drm_ioctl_kernel+0xe4/0x120
[ 525.039255] drm_ioctl+0x297/0x4c7
[ 525.039269] ksys_ioctl+0x89/0xb0
[ 525.039282] __x64_sys_ioctl+0x42/0x60
[ 525.039296] do_syscall_64+0x6e/0x2c0
[ 525.039311] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309113623.24208-1-chris@chris-wilson.co.uk
ff345271 Mon Mar 09 06:36:23 CDT 2020 Chris Wilson <chris@chris-wilson.co.uk> drm/i915/gt: Mark up intel_rps.active for racy reads
We read the current state of intel_rps.active outside of the lock, so
mark up the racy access.
[ 525.037073] BUG: KCSAN: data-race in intel_rps_boost [i915] / intel_rps_park [i915]
[ 525.037091]
[ 525.037103] write to 0xffff8881f145efa1 of 1 bytes by task 192 on cpu 2:
[ 525.037331] intel_rps_park+0x72/0x230 [i915]
[ 525.037552] __gt_park+0x61/0xa0 [i915]
[ 525.037771] ____intel_wakeref_put_last+0x42/0x90 [i915]
[ 525.037991] __intel_wakeref_put_work+0xd3/0xf0 [i915]
[ 525.038008] process_one_work+0x3b1/0x690
[ 525.038022] worker_thread+0x80/0x670
[ 525.038037] kthread+0x19a/0x1e0
[ 525.038051] ret_from_fork+0x1f/0x30
[ 525.038062]
[ 525.038074] read to 0xffff8881f145efa1 of 1 bytes by task 733 on cpu 3:
[ 525.038304] intel_rps_boost+0x67/0x1f0 [i915]
[ 525.038535] i915_request_wait+0x562/0x5d0 [i915]
[ 525.038764] i915_gem_object_wait_fence+0x81/0xa0 [i915]
[ 525.038994] i915_gem_object_wait_reservation+0x489/0x520 [i915]
[ 525.039224] i915_gem_wait_ioctl+0x167/0x2b0 [i915]
[ 525.039241] drm_ioctl_kernel+0xe4/0x120
[ 525.039255] drm_ioctl+0x297/0x4c7
[ 525.039269] ksys_ioctl+0x89/0xb0
[ 525.039282] __x64_sys_ioctl+0x42/0x60
[ 525.039296] do_syscall_64+0x6e/0x2c0
[ 525.039311] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200309113623.24208-1-chris@chris-wilson.co.uk
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