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Subject[PATCH 1/2] i2c-dev: don't get i2c adapter via i2c_dev
Date
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>
---
drivers/i2c/i2c-dev.c | 7 +------
1 file changed, 1 insertion(+), 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;

--
2.7.4
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