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OpenCloudOS-Kernel
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i2c: add sanity check to i2c_put_adapter 

i2c_put_adapter dereferences i2c_adapter pointer passed without check
for NULL. This adds a check for non-NULL pointer to allow i2c_put_adapter
called with NULL and behave the same way i2c_release_client does already.
It allows to simplify drivers where you need to release the adapter
during probe failures.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Sebastian Hesselbarth 2013-08-01 14:10:46 +02:00 committed by Wolfram Sang
parent 3923172b3d
commit c66c4cc087
1 changed files with 2 additions and 1 deletions
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3
drivers/i2c/i2c-core.c
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@ -1825,7 +1825,8 @@ EXPORT_SYMBOL(i2c_get_adapter);
void i2c_put_adapter(struct i2c_adapter *adap)
{
module_put(adap->owner);
if (adap)
module_put(adap->owner);
}
EXPORT_SYMBOL(i2c_put_adapter);