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drm/amd/display: Fix variable deferencing before NULL check in edp_setup_replay()

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commit 7073934f5d73f8b53308963cee36f0d389ea857c upstream.

In edp_setup_replay(), 'struct dc *dc' & 'struct dmub_replay *replay'
was dereferenced before the pointer 'link' & 'replay' NULL check.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_edp_panel_control.c:947 edp_setup_replay() warn: variable dereferenced before check 'link' (see line 933)

Cc: stable@vger.kernel.org
Cc: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Alex Deucher <alexander.deucher@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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivasan Shanmugam
2024-01-08 21:20:28 +05:30
committed by Greg Kroah-Hartman
parent b788696f9e
commit 22ae604aea
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
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@@ -920,8 +920,8 @@ bool edp_get_replay_state(const struct dc_link *link, uint64_t *state)
bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream)
{
/* To-do: Setup Replay */
struct dc *dc = link->ctx->dc;
struct dmub_replay *replay = dc->res_pool->replay;
struct dc *dc;
struct dmub_replay *replay;
int i;
unsigned int panel_inst;
struct replay_context replay_context = { 0 };
@@ -937,6 +937,10 @@ bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream
if (!link)
return false;
dc = link->ctx->dc;
replay = dc->res_pool->replay;
if (!replay)
return false;
@@ -965,8 +969,7 @@ bool edp_setup_replay(struct dc_link *link, const struct dc_stream_state *stream
replay_context.line_time_in_ns = lineTimeInNs;
if (replay)
link->replay_settings.replay_feature_enabled =
link->replay_settings.replay_feature_enabled =
replay->funcs->replay_copy_settings(replay, link, &replay_context, panel_inst);
if (link->replay_settings.replay_feature_enabled) {