On Thu, Aug 01, 2013 at 02:10:46PM +0200, Sebastian Hesselbarth wrote: > 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.
What about using WARN for the NULL case to point out the ref-counting
imbalance?
>
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselba...@gmail.com>
> ---
> Cc: Wolfram Sang <w...@the-dreams.de>
> Cc: linux-...@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
> drivers/i2c/i2c-core.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index f32ca29..d075df6 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);
>
> --
> 1.7.10.4
>
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