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| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2013-08-01 14:10:46 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-08-07 17:06:26 +0200 |
| commit | c66c4cc087eb1f5307f6391e467797227aed758a (patch) | |
| tree | 3dd599cd11bc0b3d7bafad2212d55113080c904e | |
| parent | 3923172b3d700486c1ca24df9c4c5405a83e2309 (diff) | |
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>
| -rw-r--r-- | drivers/i2c/i2c-core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index f32ca293ae0e..d075df641c2c 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -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); |