Commit 7c2551fa authored by Stanley.Yang's avatar Stanley.Yang Committed by Alex Deucher
Browse files

drm/amdgpu: Calculate EEPROM table ras info bytes sum 



It's more reasonable to check EEPROM table ras info bytes.

Signed-off-by: default avatarStanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 7f599fed

drivers/gpu/drm/amd/amdgpu/amdgpu_ras_eeprom.c

+19 −0
Original line number Diff line number Diff line
@@ -355,6 +355,21 @@ static u8 __calc_hdr_byte_sum(const struct amdgpu_ras_eeprom_control *control) 
	return csum;

}



static u8 __calc_ras_info_byte_sum(const struct amdgpu_ras_eeprom_control *control)

{

	int ii;

	u8  *pp, csum;

	size_t sz;



	sz = sizeof(control->tbl_rai);

	pp = (u8 *) &control->tbl_rai;

	csum = 0;

	for (ii = 0; ii < sz; ii++, pp++)

		csum += *pp;



	return csum;

}



static int amdgpu_ras_eeprom_correct_header_tag(

	struct amdgpu_ras_eeprom_control *control,

	uint32_t header)
@@ -414,6 +429,8 @@ int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control) 
	}



	csum = __calc_hdr_byte_sum(control);

	if (hdr->version == RAS_TABLE_VER_V2_1)

		csum += __calc_ras_info_byte_sum(control);

	csum = -csum;

	hdr->checksum = csum;

	res = __write_table_header(control);
@@ -739,6 +756,8 @@ amdgpu_ras_eeprom_update_header(struct amdgpu_ras_eeprom_control *control) 
		csum += *pp;



	csum += __calc_hdr_byte_sum(control);

	if (control->tbl_hdr.version == RAS_TABLE_VER_V2_1)

		csum += __calc_ras_info_byte_sum(control);

	/* avoid sign extension when assigning to "checksum" */

	csum = -csum;

	control->tbl_hdr.checksum = csum;