diff options
| author | Alexey Khoroshilov <khoroshilov@ispras.ru> | 2011-04-15 20:40:17 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-05-20 12:28:51 (GMT) |
| commit | 6f030abf9a77f10213bc5a2da2eff478d4d4e0c3 (patch) | |
| tree | 688f987d05da108a5b84865d2e437f0eebd0b831 /drivers/media/dvb/dvb-usb | |
| parent | eeaaf817c7202b71a6e1aab87ebd538d1b5e5a42 (diff) | |
| download | linux-6f030abf9a77f10213bc5a2da2eff478d4d4e0c3.tar.xz | |
[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>
Diffstat (limited to 'drivers/media/dvb/dvb-usb')
| -rw-r--r-- | drivers/media/dvb/dvb-usb/lmedm04.c | 12 |
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; |