drm/amdgpu: Increase potential product_name to 64 characters

Having seen at least 1 42-character product_name, bump the number up to
64, and put that definition into amdgpu.h to make future adjustments
simpler.
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -813,6 +813,7 @@ struct amd_powerplay {
 
 #define AMDGPU_RESET_MAGIC_NUM 64
 #define AMDGPU_MAX_DF_PERFMONS 4
+#define AMDGPU_PRODUCT_NAME_LEN 64
 struct amdgpu_device {
 	struct device			*dev;
 	struct pci_dev			*pdev;
@@ -1083,7 +1084,7 @@ struct amdgpu_device {
 
 	/* Chip product information */
 	char				product_number[16];
-	char				product_name[32];
+	char				product_name[AMDGPU_PRODUCT_NAME_LEN];
 	char				serial[20];
 
 	atomic_t			throttling_logging_enabled;

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

@@ -88,7 +88,7 @@ static int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr,
 
 int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 {
-	unsigned char buff[34];
+	unsigned char buff[AMDGPU_PRODUCT_NAME_LEN+2];
 	u32 addrptr;
 	int size, len;
 
@@ -131,12 +131,10 @@ int amdgpu_fru_get_product_info(struct amdgpu_device *adev)
 	}
 
 	len = size;
-	/* Product name should only be 32 characters. Any more,
-	 * and something could be wrong. Cap it at 32 to be safe
-	 */
-	if (len >= sizeof(adev->product_name)) {
-		DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake");
-		len = sizeof(adev->product_name) - 1;
+	if (len >= AMDGPU_PRODUCT_NAME_LEN) {
+		DRM_WARN("FRU Product Name is larger than %d characters. This is likely a mistake",
+				AMDGPU_PRODUCT_NAME_LEN);
+		len = AMDGPU_PRODUCT_NAME_LEN - 1;
 	}
 	/* Start at 2 due to buff using fields 0 and 1 for the address */
 	memcpy(adev->product_name, &buff[2], len);