drm/amdgpu: use u32 for buf size in __amdgpu_eeprom_xfer

And also make sure the value of msg[1].len should be in the range of u16.
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -90,7 +90,7 @@
 #define MAKE_I2C_ADDR(_aa) ((0xA << 3) | (((_aa) >> 16) & 0xF))
 
 static int __amdgpu_eeprom_xfer(struct i2c_adapter *i2c_adap, u32 eeprom_addr,
-				u8 *eeprom_buf, u16 buf_size, bool read)
+				u8 *eeprom_buf, u32 buf_size, bool read)
 {
 	u8 eeprom_offset_buf[EEPROM_OFFSET_SIZE];
 	struct i2c_msg msgs[] = {
@@ -133,15 +133,15 @@ static int __amdgpu_eeprom_xfer(struct i2c_adapter *i2c_adap, u32 eeprom_addr,
 			 * cycle begins. This is implied for the
 			 * "i2c_transfer()" abstraction.
 			 */
-			len = min(EEPROM_PAGE_SIZE - (eeprom_addr &
-						      EEPROM_PAGE_MASK),
-				  (u32)buf_size);
+			len = min(EEPROM_PAGE_SIZE - (eeprom_addr & EEPROM_PAGE_MASK),
+					buf_size);
 		} else {
 			/* Reading from the EEPROM has no limitation
 			 * on the number of bytes read from the EEPROM
 			 * device--they are simply sequenced out.
+			 * Keep in mind that i2c_msg.len is u16 type.
 			 */
-			len = buf_size;
+			len = min(U16_MAX, buf_size);
 		}
 		msgs[1].len = len;
 		msgs[1].buf = eeprom_buf;