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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2011-04-15 17:40:17 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-05-20 09:28:51 -0300
commit6f030abf9a77f10213bc5a2da2eff478d4d4e0c3 (patch)
tree688f987d05da108a5b84865d2e437f0eebd0b831
parenteeaaf817c7202b71a6e1aab87ebd538d1b5e5a42 (diff)
[media] lmedm04: Do not unlock mutex if mutex_lock_interruptible failed
There are a couple of places where mutex_unlock() is called even if mutex_lock_interruptible() failed. The patch fixes the issue. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/dvb/dvb-usb/lmedm04.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/media/dvb/dvb-usb/lmedm04.c b/drivers/media/dvb/dvb-usb/lmedm04.c
index 5b0f4379..7736384 100644
--- a/drivers/media/dvb/dvb-usb/lmedm04.c
+++ b/drivers/media/dvb/dvb-usb/lmedm04.c
@@ -666,9 +666,10 @@ static int lme2510_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
else {
deb_info(1, "STM Steam Off");
/* mutex is here only to avoid collision with I2C */
- ret = mutex_lock_interruptible(&adap->dev->i2c_mutex);
+ if (mutex_lock_interruptible(&adap->dev->i2c_mutex) < 0)
+ return -EAGAIN;
- ret |= lme2510_usb_talk(adap->dev, clear_reg_3,
+ ret = lme2510_usb_talk(adap->dev, clear_reg_3,
sizeof(clear_reg_3), rbuf, rlen);
st->stream_on = 0;
st->i2c_talk_onoff = 1;
@@ -1099,12 +1100,13 @@ static int lme2510_powerup(struct dvb_usb_device *d, int onoff)
static u8 rbuf[1];
int ret, len = 3, rlen = 1;
- ret = mutex_lock_interruptible(&d->i2c_mutex);
+ if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+ return -EAGAIN;
if (onoff)
- ret |= lme2510_usb_talk(d, lnb_on, len, rbuf, rlen);
+ ret = lme2510_usb_talk(d, lnb_on, len, rbuf, rlen);
else
- ret |= lme2510_usb_talk(d, lnb_off, len, rbuf, rlen);
+ ret = lme2510_usb_talk(d, lnb_off, len, rbuf, rlen);
st->i2c_talk_onoff = 1;