[PATCH 10/25] drm/amd/display: dereference variable before checking for zero

[Wayne Lin]

From: Josip Pavic <josip.pa...@amd.com>

[Why]
Driver incorrectly checks if pointer variable OutBpp is null instead of
if the value being pointed to is zero.

[How]
Dereference OutBpp before checking for a value of zero.

Reviewed-by: Chaitanya Dhere <chaitanya.dh...@amd.com>
Acked-by: Wayne Lin <wayne....@amd.com>
Signed-off-by: Josip Pavic <josip.pa...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c 
b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c
index 180f8a98a361..b95bf27f2fe2 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c
@@ -5420,7 +5420,7 @@ static void CalculateOutputLink(
                                        *OutBpp = TruncToValidBPP((1 - 
Downspreading / 100) * 13500, OutputLinkDPLanes, HTotal, HActive, 
PixelClockBackEnd, ForcedOutputLinkBPP, LinkDSCEnable, Output,
                                                                                
                OutputFormat, DSCInputBitPerComponent, NumberOfDSCSlices, 
(dml_uint_t)AudioSampleRate, AudioSampleLayout, ODMModeNoDSC, ODMModeDSC, 
RequiredSlots);
 
-                                       if (OutBpp == 0 && PHYCLKD32PerState < 
20000 / 32 && DSCEnable == dml_dsc_enable_if_necessary && ForcedOutputLinkBPP 
== 0) {
+                                       if (*OutBpp == 0 && PHYCLKD32PerState < 
20000 / 32 && DSCEnable == dml_dsc_enable_if_necessary && ForcedOutputLinkBPP 
== 0) {
                                                *RequiresDSC = true;
                                                LinkDSCEnable = true;
                                                *OutBpp = TruncToValidBPP((1 - 
Downspreading / 100) * 13500, OutputLinkDPLanes, HTotal, HActive, 
PixelClockBackEnd, ForcedOutputLinkBPP, LinkDSCEnable, Output,
-- 
2.37.3