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Commit e44c153b authored by Dan Carpenter's avatar Dan Carpenter Committed by Mauro Carvalho Chehab
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[media] em28xx-i2c: rt_mutex_trylock() returns zero on failure 



The code is checking for negative returns but it should be checking for
zero.

Fixes: aab3125c ('[media] em28xx: add support for registering multiple i2c buses')

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 917d11a4

drivers/media/usb/em28xx/em28xx-i2c.c

+2 −3
Original line number Diff line number Diff line
@@ -507,9 +507,8 @@ static int em28xx_i2c_xfer(struct i2c_adapter *i2c_adap, 
	if (dev->disconnected)

		return -ENODEV;



	rc = rt_mutex_trylock(&dev->i2c_bus_lock);

	if (rc < 0)

		return rc;

	if (!rt_mutex_trylock(&dev->i2c_bus_lock))

		return -EAGAIN;



	/* Switch I2C bus if needed */

	if (bus != dev->cur_i2c_bus &&