4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit e44c153b30c9a0580fc2b5a93f3c6d593def2278 upstream.
The code is checking for negative returns but it should be checking for
zero.
Fixes: aab3125c43d8 ('[media] em28xx: add support for registering multiple i2c buses')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/usb/em28xx/em28xx-i2c.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/media/usb/em28xx/em28xx-i2c.c
+++ b/drivers/media/usb/em28xx/em28xx-i2c.c
@@ -507,9 +507,8 @@ static int em28xx_i2c_xfer(struct i2c_ad
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 &&
--
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