| Message ID | 1405113955-17073-1-git-send-email-shuah.kh@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c index b58d4eb..1048c1a 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;
In em28xx usb disconnect code path, some dvb fe and tuner drivers attempt i2c transfers from their release interfaces. When device is removed, return -ENODEV instead of attempting to transfer data over i2c. Signed-off-by: Shuah Khan <shuah.kh@samsung.com> --- drivers/media/usb/em28xx/em28xx-i2c.c | 6 ++++++ 1 file changed, 6 insertions(+)