diff options
| -rw-r--r-- | drivers/media/usb/em28xx/em28xx-i2c.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c index b58d4ebf6419..1048c1a23fb6 100644 --- a/drivers/media/usb/em28xx/em28xx-i2c.c +++ b/drivers/media/usb/em28xx/em28xx-i2c.c @@ -501,6 +501,12 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, int addr, rc, i; u8 reg; + /* prevent i2c xfer attempts after device is disconnected + some fe's try to do i2c writes/reads from their release + interfaces when called in disconnect path */ + if (dev->disconnected) + return -ENODEV; + rc = rt_mutex_trylock(&dev->i2c_bus_lock); if (rc < 0) return rc; |