This is a note to let you know that I've just added the patch titled
drm/amd/display: Fix uninitialized variable usage in core_link_ 'read_dpcd() & write_dpcd()' functions
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-uninitialized-variable-usage-in-core_link_-read_dpcd-write_dpcd-functions.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a58371d632ebab9ea63f10893a6b6731196b6f8d Mon Sep 17 00:00:00 2001
From: Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>
Date: Wed, 17 Jan 2024 08:41:52 +0530
Subject: drm/amd/display: Fix uninitialized variable usage in core_link_ 'read_dpcd() & write_dpcd()' functions
From: Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>
commit a58371d632ebab9ea63f10893a6b6731196b6f8d upstream.
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@xxxxxxxxxxxxxxx
Cc: Jerry Zuo <jerry.zuo@xxxxxxx>
Cc: Jun Lei <Jun.Lei@xxxxxxx>
Cc: Wayne Lin <Wayne.Lin@xxxxxxx>
Cc: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Cc: Hamza Mahfooz <hamza.mahfooz@xxxxxxx>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dpcd.c
@@ -205,7 +205,7 @@ 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;
@@ -234,7 +234,7 @@ 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);
Patches currently in stable-queue which might be from srinivasan.shanmugam@xxxxxxx are
queue-6.6/drm-amd-display-fix-late-derefrence-dsc-check-in-link_set_dsc_pps_packet.patch
queue-6.6/drm-amd-display-fix-variable-deferencing-before-null-check-in-edp_setup_replay.patch
queue-6.6/drm-amd-display-fix-uninitialized-variable-usage-in-core_link_-read_dpcd-write_dpcd-functions.patch
