[PATCH 6.1 34/71] drm/amd/display: Fix uninitialized variable usage in core_link_ 'read_dpcd() & write_dpcd()' functions

Sasha Levin
2024-03-13T16:40:39Z

From: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>

[ Upstream commit a58371d632ebab9ea63f10893a6b6731196b6f8d ]

The 'status' variable in 'core_link_read_dpcd()' &
'core_link_write_dpcd()' was uninitialized.

Thus, initializing 'status' variable to 'DC_ERROR_UNEXPECTED' by default.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:226 core_link_read_dpcd() error: uninitialized symbol 'status'.
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dpcd.c:248 core_link_write_dpcd() error: uninitialized symbol 'status'.

Cc: stable@vger.kernel.org
Cc: Jerry Zuo <jerry.zuo@amd.com>
Cc: Jun Lei <Jun.Lei@amd.com>
Cc: Wayne Lin <Wayne.Lin@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
index af110bf9470fa..aefca9756dbe8 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpcd.c
@@ -202,7 +202,7 @@ enum dc_status core_link_read_dpcd(
uint32_t extended_size;
/* size of the remaining partitioned address space */
uint32_t size_left_to_read;
- enum dc_status status;
+ enum dc_status status = DC_ERROR_UNEXPECTED;
/* size of the next partition to be read from */
uint32_t partition_size;
uint32_t data_index = 0;
@@ -231,7 +231,7 @@ enum dc_status core_link_write_dpcd(
{
uint32_t partition_size;
uint32_t data_index = 0;
- enum dc_status status;
+ enum dc_status status = DC_ERROR_UNEXPECTED;

while (size) {
partition_size = dpcd_get_next_partition_size(address, size);
--
2.43.0