[media] drivers/media/dvb/ttpci/av7110_av.c: Add missing error handling code

Extend the error handling code with operations found in other nearby error
handling code.

A simplified version of the sematic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
@r@
statement S1,S2,S3;
constant C1,C2,C3;
@@

*if (...)
 {... S1 return -C1;}
...
*if (...)
 {... when != S1
    return -C2;}
...
*if (...)
 {... S1 return -C3;}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/ttpci/av7110_av.c b/drivers/media/dvb/ttpci/av7110_av.c
index 13efba9..4a31cf6 100644 (file)
--- a/drivers/media/dvb/ttpci/av7110_av.c
+++ b/drivers/media/dvb/ttpci/av7110_av.c
@@ -245,8 +245,11 @@ int av7110_pes_play(void *dest, struct dvb_ringbuffer *buf, int dlen)
                return -1;
        }
        while (1) {
-               if ((len = dvb_ringbuffer_avail(buf)) < 6)
+               len = dvb_ringbuffer_avail(buf);
+               if (len < 6) {
+                       wake_up(&buf->queue);
                        return -1;
+               }
                sync =  DVB_RINGBUFFER_PEEK(buf, 0) << 24;
                sync |= DVB_RINGBUFFER_PEEK(buf, 1) << 16;
                sync |= DVB_RINGBUFFER_PEEK(buf, 2) << 8;