From: Sung-huai Wang <danny.wang@xxxxxxx>
[Why & How]
We have to check if stream is properly initialized before calling
find_matching_pll(), otherwise we might end up trying to deferecence a
NULL pointer.
Cc: stable@xxxxxxxxxxxxxxx # 6.1+
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Acked-by: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Sung-huai Wang <danny.wang@xxxxxxx>
---
.../gpu/drm/amd/display/dc/dce112/dce112_resource.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
index 808855886183..e115ff91aaaa 100644
--- a/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c
@@ -974,10 +974,12 @@ enum dc_status resource_map_phy_clock_resources(
|| dc_is_virtual_signal(pipe_ctx->stream->signal))
pipe_ctx->clock_source =
dc->res_pool->dp_clock_source;
- else
- pipe_ctx->clock_source = find_matching_pll(
- &context->res_ctx, dc->res_pool,
- stream);
+ else {
+ if (stream && stream->link && stream->link->link_enc)
+ pipe_ctx->clock_source = find_matching_pll(
+ &context->res_ctx, dc->res_pool,
+ stream);
+ }
if (pipe_ctx->clock_source == NULL)
return DC_NO_CLOCK_SOURCE_RESOURCE;
--
2.40.1
