[PATCH 31/45] drm/amd/display: Fix Coverity INTERGER_OVERFLOW within construct_integrated_info

[Tom Chung]

From: Hersen Wu <hersenxs...@amd.com>

[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.h...@amd.com>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com>
Acked-by: Tom Chung <chiahsuan.ch...@amd.com>
Signed-off-by: Hersen Wu <hersenxs...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/bios/bios_parser.c  | 4 ++--
 drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c | 7 +++++--
 2 files changed, 7 insertions(+), 4 deletions(-)

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,
-- 
2.34.1