Reviewed-by: Tom Chung <[email protected]>
On 7/31/2024 3:57 PM, Srinivasan Shanmugam wrote:
This commit adds a null check for the set_output_gamma function pointer
in the dcn401_set_output_transfer_func function. Previously,
set_output_gamma was being checked for null, but then it was being
dereferenced without any null check. This could lead to a null pointer
dereference if set_output_gamma is null.
To fix this, we now ensure that set_output_gamma is not null before
dereferencing it. We do this by adding a null check for set_output_gamma
before the call to set_output_gamma.
Cc: Tom Chung <[email protected]>
Cc: Rodrigo Siqueira <[email protected]>
Cc: Roman Li <[email protected]>
Cc: Alex Hung <[email protected]>
Cc: Aurabindo Pillai <[email protected]>
Cc: Harry Wentland <[email protected]>
Cc: Hamza Mahfooz <[email protected]>
Signed-off-by: Srinivasan Shanmugam <[email protected]>
---
drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
index ceaaa8df3641..77489bbcda02 100644
--- a/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c
@@ -743,7 +743,9 @@ bool dcn401_set_output_transfer_func(struct dc *dc,
}
}
- mpc->funcs->set_output_gamma(mpc, mpcc_id, params);
+ if (mpc->funcs->set_output_gamma)
+ mpc->funcs->set_output_gamma(mpc, mpcc_id, params);
+
return ret;
}
