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authorviresh kumar <viresh.kumar@linaro.org>2016-07-05 19:57:06 -0700
committerWolfram Sang <wsa@the-dreams.de>2016-07-08 10:29:31 +0900
commit5136ed4fcb05cd4981cc6034a11e66370ed84789 (patch)
tree79a21ebef1c71bc51f32908141ac53155b90891c /drivers/i2c
parentec2790e9d72e87c90d9247430c3f08df1fce3c75 (diff)
downloadlinux-5136ed4fcb05cd4981cc6034a11e66370ed84789.tar.bz2
i2c-dev: don't get i2c adapter via i2c_dev
There is no code protecting i2c_dev to be freed after it is returned from i2c_dev_get_by_minor() and using it to access the value which we already have (minor) isn't safe really. Avoid using it and get the adapter directly from 'minor'. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Jean Delvare <jdelvare@suse.de> Tested-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/i2c-dev.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 6ecfd76270f2..66f323fd3982 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -485,13 +485,8 @@ static int i2cdev_open(struct inode *inode, struct file *file)
unsigned int minor = iminor(inode);
struct i2c_client *client;
struct i2c_adapter *adap;
- struct i2c_dev *i2c_dev;
-
- i2c_dev = i2c_dev_get_by_minor(minor);
- if (!i2c_dev)
- return -ENODEV;
- adap = i2c_get_adapter(i2c_dev->adap->nr);
+ adap = i2c_get_adapter(minor);
if (!adap)
return -ENODEV;