dib0700_i2c_xfer [_new and _legacy] leave i2c_mutex locked on error paths.
The patch adds appropriate unlocks.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
---
drivers/media/dvb/dvb-usb/dib0700_core.c | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c
index 070e82a..8ec22c4 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_core.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_core.c
@@ -228,7 +228,7 @@ static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
/* Write request */
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
err("could not acquire lock");
- return 0;
+ break;
}
st->buf[0] = REQUEST_NEW_I2C_WRITE;
st->buf[1] = msg[i].addr << 1;
@@ -270,11 +270,14 @@ static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
struct dib0700_state *st = d->priv;
int i,len;
- if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+ if (mutex_lock_interruptible(&d->i2c_mutex) < 0) {
+ err("could not acquire lock");
return -EAGAIN;
+ }
if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
+ mutex_unlock(&d->i2c_mutex);
err("could not acquire lock");
- return 0;
+ return -EAGAIN;
}
for (i = 0; i < num; i++) {
--
1.7.4.1
--
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