[media] dibusb: handle error code on RC query

There's no sense on decoding and generating a RC key code if
there was an error on the URB control message.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c
index 951f3dac9082e54205eb0c4d1ec78e619ee1efc2..b0fd9a609352925063e32f7baa6f54c08e0c9866 100644 (file)
--- a/drivers/media/usb/dvb-usb/dibusb-common.c
+++ b/drivers/media/usb/dvb-usb/dibusb-common.c
@@ -366,6 +366,7 @@ EXPORT_SYMBOL(rc_map_dibusb_table);
 int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 {
        u8 *buf;
+       int ret;
 
        buf = kmalloc(5, GFP_KERNEL);
        if (!buf)
@@ -373,7 +374,9 @@ int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 
        buf[0] = DIBUSB_REQ_POLL_REMOTE;
 
-       dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
+       ret = dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
+       if (ret < 0)
+               goto ret;
 
        dvb_usb_nec_rc_key_to_event(d, buf, event, state);
 
@@ -382,6 +385,7 @@ int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
 
        kfree(buf);
 
-       return 0;
+ret:
+       return ret;
 }
 EXPORT_SYMBOL(dibusb_rc_query);