From: Paulo Miguel Almeida Date: Sun, 13 Nov 2022 07:44:05 +0000 (+1300) Subject: drm/amdgpu: Replace one-elements array with flex-array members X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bd3fe587f8989cd06209927abd71ee0af13cca4a;p=linux.git drm/amdgpu: Replace one-elements array with flex-array members One-element arrays are deprecated, and we are replacing them with flexible array members instead. So, replace one-element array with flexible-array member in structs ATOM_I2C_VOLTAGE_OBJECT_V3, ATOM_ASIC_INTERNAL_SS_INFO_V2, ATOM_ASIC_INTERNAL_SS_INFO_V3, and refactor the rest of the code accordingly. Important to mention is that doing a build before/after this patch results in no functional binary output differences. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/KSPP/linux/issues/238 Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836 [1] Signed-off-by: Paulo Miguel Almeida Signed-off-by: Alex Deucher --- 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 6b9e64cd43799..a1a00f432168e 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c @@ -665,8 +665,9 @@ static enum bp_result get_ss_info_v3_1( if (!DATA_TABLES(ASIC_InternalSS_Info)) return BP_RESULT_UNSUPPORTED; - ss_table_header_include = GET_IMAGE(ATOM_ASIC_INTERNAL_SS_INFO_V3, - DATA_TABLES(ASIC_InternalSS_Info)); + 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))); table_size = (le16_to_cpu(ss_table_header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) @@ -1032,8 +1033,10 @@ static enum bp_result get_ss_info_from_internal_ss_info_tbl_V2_1( if (!DATA_TABLES(ASIC_InternalSS_Info)) return result; - header = GET_IMAGE(ATOM_ASIC_INTERNAL_SS_INFO_V2, - DATA_TABLES(ASIC_InternalSS_Info)); + header = ((ATOM_ASIC_INTERNAL_SS_INFO_V2 *) bios_get_image( + &bp->base, + DATA_TABLES(ASIC_InternalSS_Info), + struct_size(header, asSpreadSpectrum, 1))); memset(info, 0, sizeof(struct spread_spectrum_info)); @@ -1712,8 +1715,10 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_v2_1( if (!DATA_TABLES(ASIC_InternalSS_Info)) return 0; - header_include = GET_IMAGE(ATOM_ASIC_INTERNAL_SS_INFO_V2, - DATA_TABLES(ASIC_InternalSS_Info)); + header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V2 *) bios_get_image( + &bp->base, + DATA_TABLES(ASIC_InternalSS_Info), + struct_size(header_include, asSpreadSpectrum, 1))); size = (le16_to_cpu(header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) @@ -1749,8 +1754,9 @@ static uint32_t get_ss_entry_number_from_internal_ss_info_tbl_V3_1( if (!DATA_TABLES(ASIC_InternalSS_Info)) return number; - header_include = GET_IMAGE(ATOM_ASIC_INTERNAL_SS_INFO_V3, - DATA_TABLES(ASIC_InternalSS_Info)); + header_include = ((ATOM_ASIC_INTERNAL_SS_INFO_V3 *) bios_get_image(&bp->base, + DATA_TABLES(ASIC_InternalSS_Info), + struct_size(header_include, asSpreadSpectrum, 1))); size = (le16_to_cpu(header_include->sHeader.usStructureSize) - sizeof(ATOM_COMMON_TABLE_HEADER)) / sizeof(ATOM_ASIC_SS_ASSIGNMENT_V3); diff --git a/drivers/gpu/drm/amd/include/atombios.h b/drivers/gpu/drm/amd/include/atombios.h index 60c44a8a067ff..4dc738c517712 100644 --- a/drivers/gpu/drm/amd/include/atombios.h +++ b/drivers/gpu/drm/amd/include/atombios.h @@ -5146,7 +5146,7 @@ typedef struct _ATOM_I2C_VOLTAGE_OBJECT_V3 UCHAR ucVoltageControlOffset; UCHAR ucVoltageControlFlag; // Bit0: 0 - One byte data; 1 - Two byte data UCHAR ulReserved[3]; - VOLTAGE_LUT_ENTRY asVolI2cLut[1]; // end with 0xff + VOLTAGE_LUT_ENTRY asVolI2cLut[]; // end with 0xff }ATOM_I2C_VOLTAGE_OBJECT_V3; // ATOM_I2C_VOLTAGE_OBJECT_V3.ucVoltageControlFlag @@ -6679,7 +6679,7 @@ typedef struct _ATOM_ASIC_INTERNAL_SS_INFO typedef struct _ATOM_ASIC_INTERNAL_SS_INFO_V2 { ATOM_COMMON_TABLE_HEADER sHeader; - ATOM_ASIC_SS_ASSIGNMENT_V2 asSpreadSpectrum[1]; //this is point only. + ATOM_ASIC_SS_ASSIGNMENT_V2 asSpreadSpectrum[]; //this is point only. }ATOM_ASIC_INTERNAL_SS_INFO_V2; typedef struct _ATOM_ASIC_SS_ASSIGNMENT_V3 @@ -6701,7 +6701,7 @@ typedef struct _ATOM_ASIC_SS_ASSIGNMENT_V3 typedef struct _ATOM_ASIC_INTERNAL_SS_INFO_V3 { ATOM_COMMON_TABLE_HEADER sHeader; - ATOM_ASIC_SS_ASSIGNMENT_V3 asSpreadSpectrum[1]; //this is pointer only. + ATOM_ASIC_SS_ASSIGNMENT_V3 asSpreadSpectrum[]; //this is pointer only. }ATOM_ASIC_INTERNAL_SS_INFO_V3;