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34e71ca0a0068f9d7e12c59dc997ae5725fa181f
android_kernel_xiaomi_sm8450/drivers/gpu/drm/msm
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Dmitry Baryshkov 34e71ca0a0 drm/msm/a5xx: fix the emptyness check in the preempt code 
[ Upstream commit b4fb748f0b734ce1d2e7834998cc599fcbd25d67 ]

Quoting Yassine: ring->memptrs->rptr is never updated and stays 0, so
the comparison always evaluates to false and get_next_ring always
returns ring 0 thinking it isn't empty.

Fix this by calling get_rptr() instead of reading rptr directly.

Reported-by: Yassine Oudjana <y.oudjana@protonmail.com>
Fixes: b1fc2839d2 ("drm/msm: Implement preemption for A5XX targets")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/522642/
Link: https://lore.kernel.org/r/20230214020956.164473-4-dmitry.baryshkov@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-17 08:45:10 +01:00
..
adreno
drm/msm/a5xx: fix the emptyness check in the preempt code
2023-03-17 08:45:10 +01:00
disp
drm/msm/mdp5: Add check for kzalloc
2023-03-11 16:39:34 +01:00
dp
drm/msm/dp: do not complete dp_aux_cmd_fifo_tx() if irq is not for aux transfer
2023-01-18 11:44:54 +01:00
dsi
drm/msm/dsi: Add missing check for alloc_ordered_workqueue
2023-03-11 16:39:52 +01:00
edp
drm/msm: Fix null pointer dereference on pointer edp
2021-10-20 11:45:05 +02:00
hdmi
drm/msm/hdmi: Add missing check for alloc_ordered_workqueue
2023-03-11 16:39:31 +01:00
Kconfig
drm/msm/dp: displayPort driver need algorithm rational
2022-01-27 10:53:55 +01:00
Makefile
drm/msm/hdmi: switch to drm_bridge_connector
2023-01-14 10:15:26 +01:00
msm_atomic_trace.h
…
msm_atomic_tracepoints.c
…
msm_atomic.c
drm/msm: enable vblank during atomic commits
2020-08-21 22:30:17 -07:00
msm_debugfs.c
drm/msm: Do hw_init() before capturing GPU state
2021-12-08 09:03:26 +01:00
msm_debugfs.h
…
msm_drv.c
drm/msm: add missing include to msm_drv.c
2022-06-09 10:21:05 +02:00
msm_drv.h
drm/msm/a6xx: Track current ctx by seqno
2021-10-20 11:45:05 +02:00
msm_fb.c
…
msm_fbdev.c
…
msm_fence.c
drm/msm: use strscpy instead of strncpy
2023-03-11 16:39:33 +01:00
msm_fence.h
…
msm_gem_prime.c
drm/msm: return an error pointer in msm_gem_prime_get_sg_table()
2022-06-09 10:21:06 +02:00
msm_gem_shrinker.c
drm/msm: Convert shrinker msgs to tracepoints
2020-09-09 15:25:54 -07:00
msm_gem_submit.c
drm/msm: Fix potential invalid ptr free
2023-03-17 08:45:09 +01:00
msm_gem_vma.c
drm/msm: Leave inuse count intact on map failure
2020-09-22 08:28:15 -07:00
msm_gem.c
drm/msm: Add missing put_task_struct() in debugfs path
2022-04-20 09:23:10 +02:00
msm_gem.h
drm/msm: Fix premature purging of BO
2020-09-22 08:28:15 -07:00
msm_gpu_trace.h
drm/msm/gpu: Add suspend/resume tracepoints
2020-09-12 09:59:58 -07:00
msm_gpu_tracepoints.c
…
msm_gpu.c
drm/msm: prevent NULL dereference in msm_gpu_crashstate_capture()
2021-11-18 14:03:57 +01:00
msm_gpu.h
drm/msm: Allow a5xx to mark the RPTR shadow as privileged
2020-09-15 10:47:44 -07:00
msm_gpummu.c
Merge tag 'drm-msm-next-2020-09-27' of https://gitlab.freedesktop.org/drm/msm into drm-next
2020-09-29 10:18:49 +10:00
msm_iommu.c
drm/msm: use for_each_sgtable_sg to iterate over scatterlist
2022-06-29 08:59:46 +02:00
msm_kms.h
…
msm_mmu.h
drm/msm: Add support to create a local pagetable
2020-09-12 10:48:32 -07:00
msm_perf.c
…
msm_rd.c
drm/msm/rd: Fix FIFO-full deadlock
2022-09-20 12:38:31 +02:00
msm_ringbuffer.c
drm/msm: Document and rename preempt_lock
2023-03-17 08:45:09 +01:00
msm_ringbuffer.h
drm/msm: Document and rename preempt_lock
2023-03-17 08:45:09 +01:00
msm_submitqueue.c
drm/msm: Add a context pointer to the submitqueue
2020-09-12 10:45:56 -07:00
NOTES
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