From 7989d0b731858611289fbfd7c8fb1cdeda30cbc6 Mon Sep 17 00:00:00 2001 From: Paulo Miguel Almeida Date: Wed, 9 Nov 2022 20:33:34 +1300 Subject: [PATCH] drm/amdgpu: Replace one-element array with flex-array member 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_CONNECTOR_DEVICE_TAG_RECORD, _ATOM_OBJECT_GPIO_CNTL_RECORD, _ATOM_BRACKET_LAYOUT_RECORD, _ATOM_BRACKET_LAYOUT_RECORD, _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3, _ATOM_FUSION_SYSTEM_INFO_V3, _ATOM_I2C_DATA_RECORD, _ATOM_I2C_DEVICE_SETUP_INFO, _ATOM_ASIC_MVDD_INFO and refactor the rest of the code accordingly. While at it, removed a redundant casting. Important to mention is that doing a build before/after this patch results in no 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 --- .../gpu/drm/amd/display/dc/bios/bios_parser.c | 5 ++--- drivers/gpu/drm/amd/include/atombios.h | 16 ++++++++-------- 2 files changed, 10 insertions(+), 11 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 39dd8b2dc254..6b9e64cd4379 100644 --- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c +++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser.c @@ -2606,8 +2606,7 @@ static enum bp_result update_slot_layout_info( for (;;) { - record_header = (ATOM_COMMON_RECORD_HEADER *) - GET_IMAGE(ATOM_COMMON_RECORD_HEADER, record_offset); + record_header = GET_IMAGE(ATOM_COMMON_RECORD_HEADER, record_offset); if (record_header == NULL) { result = BP_RESULT_BADBIOSTABLE; break; @@ -2621,7 +2620,7 @@ static enum bp_result update_slot_layout_info( if (record_header->ucRecordType == ATOM_BRACKET_LAYOUT_RECORD_TYPE && - sizeof(ATOM_BRACKET_LAYOUT_RECORD) + struct_size(record, asConnInfo, 1) <= record_header->ucRecordSize) { record = (ATOM_BRACKET_LAYOUT_RECORD *) (record_header); diff --git a/drivers/gpu/drm/amd/include/atombios.h b/drivers/gpu/drm/amd/include/atombios.h index 55ae93c1e365..60c44a8a067f 100644 --- a/drivers/gpu/drm/amd/include/atombios.h +++ b/drivers/gpu/drm/amd/include/atombios.h @@ -4733,7 +4733,7 @@ typedef struct _ATOM_CONNECTOR_DEVICE_TAG_RECORD ATOM_COMMON_RECORD_HEADER sheader; UCHAR ucNumberOfDevice; UCHAR ucReserved; - ATOM_CONNECTOR_DEVICE_TAG asDeviceTag[1]; //This Id is same as "ATOM_DEVICE_XXX_SUPPORT", 1 is only for allocation + ATOM_CONNECTOR_DEVICE_TAG asDeviceTag[]; //This Id is same as "ATOM_DEVICE_XXX_SUPPORT" }ATOM_CONNECTOR_DEVICE_TAG_RECORD; @@ -4793,7 +4793,7 @@ typedef struct _ATOM_OBJECT_GPIO_CNTL_RECORD ATOM_COMMON_RECORD_HEADER sheader; UCHAR ucFlags; // Future expnadibility UCHAR ucNumberOfPins; // Number of GPIO pins used to control the object - ATOM_GPIO_PIN_CONTROL_PAIR asGpio[1]; // the real gpio pin pair determined by number of pins ucNumberOfPins + ATOM_GPIO_PIN_CONTROL_PAIR asGpio[]; // the real gpio pin pair determined by number of pins ucNumberOfPins }ATOM_OBJECT_GPIO_CNTL_RECORD; //Definitions for GPIO pin state @@ -4982,7 +4982,7 @@ typedef struct _ATOM_BRACKET_LAYOUT_RECORD UCHAR ucWidth; UCHAR ucConnNum; UCHAR ucReserved; - ATOM_CONNECTOR_LAYOUT_INFO asConnInfo[1]; + ATOM_CONNECTOR_LAYOUT_INFO asConnInfo[]; }ATOM_BRACKET_LAYOUT_RECORD; @@ -5161,7 +5161,7 @@ typedef struct _ATOM_GPIO_VOLTAGE_OBJECT_V3 UCHAR ucPhaseDelay; // phase delay in unit of micro second UCHAR ucReserved; ULONG ulGpioMaskVal; // GPIO Mask value - VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[1]; + VOLTAGE_LUT_ENTRY_V2 asVolGpioLut[]; }ATOM_GPIO_VOLTAGE_OBJECT_V3; typedef struct _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3 @@ -5171,7 +5171,7 @@ typedef struct _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3 UCHAR ucLeakageEntryNum; // indicate the entry number of LeakageId/Voltage Lut table UCHAR ucReserved[2]; ULONG ulMaxVoltageLevel; - LEAKAGE_VOLTAGE_LUT_ENTRY_V2 asLeakageIdLut[1]; + LEAKAGE_VOLTAGE_LUT_ENTRY_V2 asLeakageIdLut[]; }ATOM_LEAKAGE_VOLTAGE_OBJECT_V3; @@ -6599,7 +6599,7 @@ typedef struct _ATOM_FUSION_SYSTEM_INFO_V3 typedef struct _ATOM_I2C_DATA_RECORD { UCHAR ucNunberOfBytes; //Indicates how many bytes SW needs to write to the external ASIC for one block, besides to "Start" and "Stop" - UCHAR ucI2CData[1]; //I2C data in bytes, should be less than 16 bytes usually + UCHAR ucI2CData[]; //I2C data in bytes, should be less than 16 bytes usually }ATOM_I2C_DATA_RECORD; @@ -6610,14 +6610,14 @@ typedef struct _ATOM_I2C_DEVICE_SETUP_INFO UCHAR ucSSChipID; //SS chip being used UCHAR ucSSChipSlaveAddr; //Slave Address to set up this SS chip UCHAR ucNumOfI2CDataRecords; //number of data block - ATOM_I2C_DATA_RECORD asI2CData[1]; + ATOM_I2C_DATA_RECORD asI2CData[]; }ATOM_I2C_DEVICE_SETUP_INFO; //========================================================================================== typedef struct _ATOM_ASIC_MVDD_INFO { ATOM_COMMON_TABLE_HEADER sHeader; - ATOM_I2C_DEVICE_SETUP_INFO asI2CSetup[1]; + ATOM_I2C_DEVICE_SETUP_INFO asI2CSetup[]; }ATOM_ASIC_MVDD_INFO; //========================================================================================== -- 2.39.5