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| author |   Rahul Kumar <rahul.kumar1@amd.com> | 2022-06-28 01:36:38 +0530 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2022-06-28 11:24:51 -0400 |
| commit | 1c4dae3e4639540fb567e570cc56a3c292afb6fe (patch) | |
| tree | 44ae7eea7674787257416a2bc89e5e90fab8bfa5 /drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | |
| parent | drm/amdgpu: Follow up change to previous drm scheduler change. (diff) | |
| download | wireguard-linux-1c4dae3e4639540fb567e570cc56a3c292afb6fe.tar.xz wireguard-linux-1c4dae3e4639540fb567e570cc56a3c292afb6fe.zip | |
drm/amdgpu/display/dc: Fix null pointer exception
We observed hard hang due to NULL derefrence This issue is seen after
running system all the time after two or three days
struct dc *dc = plane_state->ctx->dc; Randomly in long run we found
plane_state or plane_state->ctx is found NULL which causes exception.
BUG: kernel NULL pointer dereference, address: 0000000000000000
PF: supervisor read access in kernel mode
PF: error_code(0x0000) - not-present page
PGD 1dc7f2067 P4D 1dc7f2067 PUD 222c75067 PMD 0
Oops: 0000 [#1] SMP NOPTI
CPU: 5 PID: 29855 Comm: kworker/u16:4 ...
...
Workqueue: events_unbound commit_work [drm_kms_helper]
RIP: 0010:dcn10_update_pending_status+0x1f/0xee [amdgpu]
Code: 41 5f c3 0f 1f 44 00 00 b0 01 c3 0f 1f 44 00 00 41 55 41 54 55 53 48 8b 1f 4c 8b af f8 00 00 00 48 8b 83 88 03 00 00 48 85 db <4c> 8b 20 0f 84 bf 00 00 00 48 89 fd 48 8b bf b8 00 00 00 48 8b 07
RSP: 0018:ffff942941997ab8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8d7fd98d2000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8d7e3e87c708 RDI: ffff8d7f2d8c0690
RBP: ffff8d7f2d8c0000 R08: ffff942941997a34 R09: 00000000ffffffff
R10: 0000000000005000 R11: 00000000000000f0 R12: ffff8d7f2d8c0690
R13: ffff8d8035a41680 R14: 00000000000186a0 R15: ffff8d7f2d8c1dd8
FS: 0000000000000000(0000) GS:ffff8d8037340000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000148030000 CR4: 00000000003406e0
Call Trace:
dc_commit_state+0x6a2/0x7f0 [amdgpu]
amdgpu_dm_atomic_commit_tail+0x460/0x19bb [amdgpu]
Tested-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Rahul Kumar <rahul.kumar1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index fff724e94eed..aaa0bf321bce 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -3243,7 +3243,7 @@ void dcn10_update_pending_status(struct pipe_ctx *pipe_ctx) struct dc_plane_state *plane_state = pipe_ctx->plane_state; struct timing_generator *tg = pipe_ctx->stream_res.tg; bool flip_pending; - struct dc *dc = plane_state->ctx->dc; + struct dc *dc = pipe_ctx->stream->ctx->dc; if (plane_state == NULL) return; |