[PATCH] media: ov5640: add error trace in case of i2c read failure

[Hugues Fruchet]

Add an error trace in ov5640_read_reg() in case of i2c_transfer()
failure.

Signed-off-by: Hugues Fruchet <hugues.fruc...@st.com>
---
 drivers/media/i2c/ov5640.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 99a5902..882a7c3 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -868,8 +868,11 @@ static int ov5640_read_reg(struct ov5640_dev *sensor, u16 
reg, u8 *val)
        msg[1].len = 1;
 
        ret = i2c_transfer(client->adapter, msg, 2);
-       if (ret < 0)
+       if (ret < 0) {
+               v4l2_err(&sensor->sd, "%s: error: reg=%x\n",
+                        __func__, reg);
                return ret;
+       }
 
        *val = buf[0];
        return 0;
-- 
1.9.1