From: Hersen Wu <hersenxs.wu@amd.com>
Date: Fri, 26 Apr 2024 14:46:41 +0000 (-0400)
Subject: drm/amd/display: Fix Coverity INTERGER_OVERFLOW within construct_integrated_info
X-Git-Tag: io_uring-6.11-20240722~49^2~25^2~357
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=176abbcc71952e23009a6ed194fd203b99646884;p=linux-2.6-block.git

drm/amd/display: Fix Coverity INTERGER_OVERFLOW within construct_integrated_info

[Why]
For substrcation, coverity reports integer overflow
warning message when variable type is uint32_t.

[How]
Change varaible type to int32_t.

Reviewed-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
index bc16db69a663..25fe1a124029 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
@@ -2551,8 +2551,8 @@ static enum bp_result construct_integrated_info(
 
 	/* Sort voltage table from low to high*/
 	if (result == BP_RESULT_OK) {
-		uint32_t i;
-		uint32_t j;
+		int32_t i;
+		int32_t j;
 
 		for (i = 1; i < NUMBER_OF_DISP_CLK_VOLTAGE; ++i) {
 			for (j = i; j > 0; --j) {
diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
index 4d7006fdf345..0d8498ab9b23 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
@@ -3003,8 +3003,11 @@ static enum bp_result construct_integrated_info(
 	struct atom_common_table_header *header;
 	struct atom_data_revision revision;
 
-	uint32_t i;
-	uint32_t j;
+	int32_t i;
+	int32_t j;
+
+	if (!info)
+		return result;
 
 	if (info && DATA_TABLES(integratedsysteminfo)) {
 		header = GET_IMAGE(struct atom_common_table_header,