From: Dan Carpenter <dan.carpenter@oracle.com>
To: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: [patch v2][media] em28xx-i2c: rt_mutex_trylock() returns zero on failure
Date: Mon, 9 May 2016 11:22:55 +0300 [thread overview]
Message-ID: <20160509082255.GA9926@mwanda> (raw)
In-Reply-To: <20160507100156.30b30487@recife.lan>
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@oracle.com>
---
Use different error code.
diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c b/drivers/media/usb/em28xx/em28xx-i2c.c
index a19b5c8..1a9e1e5 100644
--- 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_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 &&
prev parent reply other threads:[~2016-05-09 8:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-11 8:13 [patch] [media] em28xx-i2c: rt_mutex_trylock() returns zero on failure Dan Carpenter
2016-05-07 13:01 ` Mauro Carvalho Chehab
2016-05-09 8:22 ` Dan Carpenter [this message]
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