diff options
| author | Aurabindo Pillai <aurabindo.pillai@amd.com> | 2021-10-08 23:07:45 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-13 21:14:35 +0300 |
| commit | 1f3b22e4eb162e0b1d423106a47484943a22a309 (patch) | |
| tree | 7c1b9264be46a568441a55c497fb463ab3f033a4 /drivers | |
| parent | 62e5a7e2333a9f5395f6a9db766b7b06c949fe7a (diff) | |
| download | linux-1f3b22e4eb162e0b1d423106a47484943a22a309.tar.xz | |
drm/amd/display: fix null pointer deref when plugging in display
[Why&How]
When system boots in headless mode, connecting a 4k display creates a
null pointer dereference due to hubp for a certain plane being null.
Add a condition to check for null hubp before dereferencing it.
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c index 01a90badd173..2936a334cd64 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hwseq.c @@ -969,7 +969,8 @@ void dcn30_set_disp_pattern_generator(const struct dc *dc, /* turning off DPG */ pipe_ctx->plane_res.hubp->funcs->set_blank(pipe_ctx->plane_res.hubp, false); for (mpcc_pipe = pipe_ctx->bottom_pipe; mpcc_pipe; mpcc_pipe = mpcc_pipe->bottom_pipe) - mpcc_pipe->plane_res.hubp->funcs->set_blank(mpcc_pipe->plane_res.hubp, false); + if (mpcc_pipe->plane_res.hubp) + mpcc_pipe->plane_res.hubp->funcs->set_blank(mpcc_pipe->plane_res.hubp, false); stream_res->opp->funcs->opp_set_disp_pattern_generator(stream_res->opp, test_pattern, color_space, color_depth, solid_color, width, height, offset); |