[PATCH 59/69] media: dvb: Add check on sp8870_readreg return

[Greg Kroah-Hartman]

From: Alaa Emad <alaaemadhossney.ae@xxxxxxxxx>

The function sp8870_readreg returns a negative value when i2c_transfer
fails so properly check for this and return the error if it happens.

Cc: Sean Young <sean@xxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab+samsung@xxxxxxxxxx>
Signed-off-by: Alaa Emad <alaaemadhossney.ae@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/media/dvb-frontends/sp8870.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/sp8870.c b/drivers/media/dvb-frontends/sp8870.c
index ee893a2f2261..9767159aeb9b 100644
--- a/drivers/media/dvb-frontends/sp8870.c
+++ b/drivers/media/dvb-frontends/sp8870.c
@@ -280,7 +280,9 @@ static int sp8870_set_frontend_parameters(struct dvb_frontend *fe)
 	sp8870_writereg(state, 0xc05, reg0xc05);
 
 	// read status reg in order to clear pending irqs
-	sp8870_readreg(state, 0x200);
+	err = sp8870_readreg(state, 0x200);
+	if (err < 0)
+		return err;
 
 	// system controller start
 	sp8870_microcontroller_start(state);
-- 
2.31.1