[PATCH net] staging: fsl-dpaa2: ethsw: Add missing netdevice check

[Ioana Ciornei]

> Subject: [PATCH net] staging: fsl-dpaa2: ethsw: Add missing netdevice check
> 
> port_switchdev_event() does not check that the target network device is
> actually backed by the ethsw driver, this could be problematic in a stacked
> environment case.
> 

Just FYI, I sent a patch set containing a similar patch verifying if the netdev is backed by the ethsw:
https://lkml.org/lkml/2019/2/6/216

I sent the entire patch set against the staging tree.

Ioana C

> Fixes: 44baaa43d7cc ("staging: fsl-dpaa2/ethsw: Add Freescale DPAA2 Ethernet
> Switch driver")
> Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
> ---
>  drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-
> dpaa2/ethsw/ethsw.c
> index daabaceeea52..2edd82f5229a 100644
> --- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
> +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
> @@ -1047,6 +1047,9 @@ static int port_switchdev_event(struct notifier_block
> *unused,
>  	struct ethsw_switchdev_event_work *switchdev_work;
>  	struct switchdev_notifier_fdb_info *fdb_info = ptr;
> 
> +	if (!ethsw_port_dev_check(dev))
> +		return NOTIFY_DONE;
> +
>  	switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
>  	if (!switchdev_work)
>  		return NOTIFY_BAD;
> --
> 2.17.1