Messages in this thread Patch in this message | | | From | Viresh Kumar <> | Subject | [PATCH 1/2] i2c-dev: don't get i2c adapter via i2c_dev | Date | Tue, 5 Jul 2016 19:57:06 -0700 |
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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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