[PATCH 1/1] media:dvb: check the return value of mb86a16_read()

[Yuanjun Gong <ruc_gongyuanjun@xxxxxxx>]

return an error code if mb86a16_read() gets an unexpected return
value.

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@xxxxxxx>
---
 drivers/media/dvb-frontends/mb86a16.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/media/dvb-frontends/mb86a16.c b/drivers/media/dvb-frontends/mb86a16.c
index d3e29937cf4c..f04188a72e7a 100644
--- a/drivers/media/dvb-frontends/mb86a16.c
+++ b/drivers/media/dvb-frontends/mb86a16.c
@@ -1487,9 +1487,12 @@ static int mb86a16_set_fe(struct mb86a16_state *state)
 		}
 	}
 
-	mb86a16_read(state, 0x15, &agcval);
-	mb86a16_read(state, 0x26, &cnmval);
-	dprintk(verbose, MB86A16_INFO, 1, "AGC = %02x CNM = %02x", agcval, cnmval);
+	if (mb86a16_read(state, 0x15, &agcval) != 2 ||	mb86a16_read(state, 0x26, &cnmval) != 2){
+		dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
+		ret = -EREMOTEIO;
+	}
+	else
+		dprintk(verbose, MB86A16_INFO, 1, "AGC = %02x CNM = %02x", agcval, cnmval);
 
 	return ret;
 }
-- 
2.17.1