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drm/amd/display: Check BIOS images before it is used

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[ Upstream commit 8b0ddf19cca2a352b2a7e01d99d3ba949a99c84c ]

BIOS images may fail to load and null checks are added before they are
used.

This fixes 6 NULL_RETURNS issues reported by Coverity.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Hung
2024-06-03 08:24:13 -06:00
committed by Greg Kroah-Hartman
parent 67cf14c04f
commit e50bec62ac
1 changed files with 14 additions and 0 deletions
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14
drivers/gpu/drm/amd/display/dc/bios/bios_parser.c
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@@ -667,6 +667,9 @@ static enum bp_result get_ss_info_v3_1(
ss_table_header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V3 *) bios_get_image(&bp->base,
DATA_TABLES(ASIC_InternalSS_Info),
struct_size(ss_table_header_include, asSpreadSpectrum, 1)));
if (!ss_table_header_include)
return BP_RESULT_UNSUPPORTED;
table_size =
(le16_to_cpu(ss_table_header_include->sHeader.usStructureSize)
- sizeof(ATOM_COMMON_TABLE_HEADER))
@@ -1036,6 +1039,8 @@ static enum bp_result get_ss_info_from_internal_ss_info_tbl_V2_1(
&bp->base,
DATA_TABLES(ASIC_InternalSS_Info),
struct_size(header, asSpreadSpectrum, 1)));
if (!header)
return result;
memset(info, 0, sizeof(struct spread_spectrum_info));
@@ -1109,6 +1114,8 @@ static enum bp_result get_ss_info_from_ss_info_table(
get_atom_data_table_revision(header, &revision);
tbl = GET_IMAGE(ATOM_SPREAD_SPECTRUM_INFO, DATA_TABLES(SS_Info));
if (!tbl)
return result;
if (1 != revision.major || 2 > revision.minor)
return result;
@@ -1636,6 +1643,8 @@ static uint32_t get_ss_entry_number_from_ss_info_tbl(
tbl = GET_IMAGE(ATOM_SPREAD_SPECTRUM_INFO,
DATA_TABLES(SS_Info));
if (!tbl)
return number;
if (1 != revision.major || 2 > revision.minor)
return number;
@@ -1718,6 +1727,8 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_v2_1(
&bp->base,
DATA_TABLES(ASIC_InternalSS_Info),
struct_size(header_include, asSpreadSpectrum, 1)));
if (!header_include)
return 0;
size = (le16_to_cpu(header_include->sHeader.usStructureSize)
- sizeof(ATOM_COMMON_TABLE_HEADER))
@@ -1756,6 +1767,9 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_V3_1(
header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V3 *) bios_get_image(&bp->base,
DATA_TABLES(ASIC_InternalSS_Info),
struct_size(header_include, asSpreadSpectrum, 1)));
if (!header_include)
return number;
size = (le16_to_cpu(header_include->sHeader.usStructureSize) -
sizeof(ATOM_COMMON_TABLE_HEADER)) /
sizeof(ATOM_ASIC_SS_ASSIGNMENT_V3);