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drm/amd/display: Initialize denominator defaults to 1

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[ Upstream commit 36b23e3baf9129d5b6c3a3a85b6b7ffb75ae287c ]

[WHAT & HOW]
Variables, used as denominators and maybe not assigned to other values,
should be initialized to non-zero to avoid DIVIDE_BY_ZERO, as reported
by Coverity.

Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit e2c4c6c10542ccfe4a0830bb6c9fd5b177b7bbb7)
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Hung
2024-12-17 11:51:58 -07:00
committed by Greg Kroah-Hartman
parent 4b46fc30b3
commit c9d6afb4f9
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/amd/display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
+2 -2
View File
@@ -578,8 +578,8 @@ static void CalculateBytePerPixelAndBlockSizes(
{
*BytePerPixelDETY = 0;
*BytePerPixelDETC = 0;
*BytePerPixelY = 0;
*BytePerPixelC = 0;
*BytePerPixelY = 1;
*BytePerPixelC = 1;
if (SourcePixelFormat == dml2_444_64) {
*BytePerPixelDETY = 8;