[media] cx231xx: handle errors at read_eeprom()

Fix the following warnings:
	drivers/media/usb/cx231xx/cx231xx-cards.c: In function 'read_eeprom':
	drivers/media/usb/cx231xx/cx231xx-cards.c:979:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/media/usb/cx231xx/cx231xx-cards.c b/drivers/media/usb/cx231xx/cx231xx-cards.c
index 5812c63e1e4b..8039b769f258 100644
--- a/drivers/media/usb/cx231xx/cx231xx-cards.c
+++ b/drivers/media/usb/cx231xx/cx231xx-cards.c
@@ -991,13 +991,20 @@ static int read_eeprom(struct cx231xx *dev, u8 *eedata, int len)
 
         /* start reading at offset 0 */
         ret = i2c_transfer(&dev->i2c_bus[1].i2c_adap, &msg_write, 1);
+        if (ret < 0) {
+                cx231xx_err("Can't read eeprom\n");
+                return ret;
+        }
 
         while (len_todo > 0) {
                 msg_read.len = (len_todo > 64) ? 64 : len_todo;
                 msg_read.buf = eedata_cur;
 
                 ret = i2c_transfer(&dev->i2c_bus[1].i2c_adap, &msg_read, 1);
-
+                if (ret < 0) {
+                        cx231xx_err("Can't read eeprom\n");
+                        return ret;
+                }
                 eedata_cur += msg_read.len;
                 len_todo -= msg_read.len;
         }