On Thu, 2013-11-07 at 10:55 +0300, Dan Carpenter wrote:
> We fixed this to use free_netdev() instead of kfree() but unfortunately
> free_netdev() doesn't accept NULL pointers. Smatch complains about
> this, it's not something I discovered through testing.
Wouldn't a better approach be to change free_netdev() to allow it to
take NULL pointers?
-PJ
> Fixes: 3030d40b5036 ('staging: vt6655: use free_netdev instead of kfree')
> Fixes: 0a438d5b381e ('staging: vt6656: use free_netdev instead of kfree')
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/staging/vt6655/hostap.c b/drivers/staging/vt6655/hostap.c
> index aab0012..ab8b2ba 100644
> --- a/drivers/staging/vt6655/hostap.c
> +++ b/drivers/staging/vt6655/hostap.c
> @@ -143,7 +143,8 @@ static int hostap_disable_hostapd(PSDevice pDevice, int rtnl_locked)
> DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "%s: Netdevice %s unregistered\n",
> pDevice->dev->name, pDevice->apdev->name);
> }
> - free_netdev(pDevice->apdev);
> + if (pDevice->apdev)
> + free_netdev(pDevice->apdev);
> pDevice->apdev = NULL;
> pDevice->bEnable8021x = false;
> pDevice->bEnableHostWEP = false;
> diff --git a/drivers/staging/vt6656/hostap.c b/drivers/staging/vt6656/hostap.c
> index ae1676d..67ba48b 100644
> --- a/drivers/staging/vt6656/hostap.c
> +++ b/drivers/staging/vt6656/hostap.c
> @@ -133,7 +133,8 @@ static int hostap_disable_hostapd(struct vnt_private *pDevice, int rtnl_locked)
> DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "%s: Netdevice %s unregistered\n",
> pDevice->dev->name, pDevice->apdev->name);
> }
> - free_netdev(pDevice->apdev);
> + if (pDevice->apdev)
> + free_netdev(pDevice->apdev);
> pDevice->apdev = NULL;
> pDevice->bEnable8021x = false;
> pDevice->bEnableHostWEP = false;
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