lkml.org 
[lkml]   [2024]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectFAILED: Patch "drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()'" failed to apply to 6.8-stable tree
Date
The patch below does not apply to the 6.8-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 166225e79ccc3d02c4c46e1b3c09d03eb91473ca Mon Sep 17 00:00:00 2001
From: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Date: Wed, 10 Jan 2024 20:58:35 +0530
Subject: [PATCH] drm/amd/display: Fix late derefrence 'dsc' check in
'link_set_dsc_pps_packet()'

In link_set_dsc_pps_packet(), 'struct display_stream_compressor *dsc'
was dereferenced in a DC_LOGGER_INIT(dsc->ctx->logger); before the 'dsc'
NULL pointer check.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_dpms.c:905 link_set_dsc_pps_packet() warn: variable dereferenced before check 'dsc' (see line 903)

Cc: stable@vger.kernel.org
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Cc: Wenjing Liu <wenjing.liu@amd.com>
Cc: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
index 3de148004c066..3cbfbf8d107e9 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -900,11 +900,15 @@ bool link_set_dsc_pps_packet(struct pipe_ctx *pipe_ctx, bool enable, bool immedi
{
struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
struct dc_stream_state *stream = pipe_ctx->stream;
- DC_LOGGER_INIT(dsc->ctx->logger);

- if (!pipe_ctx->stream->timing.flags.DSC || !dsc)
+ if (!pipe_ctx->stream->timing.flags.DSC)
return false;

+ if (!dsc)
+ return false;
+
+ DC_LOGGER_INIT(dsc->ctx->logger);
+
if (enable) {
struct dsc_config dsc_cfg;
uint8_t dsc_packed_pps[128];
--
2.43.0




\
 
 \ /
  Last update: 2024-05-27 16:11    [W:0.027 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site