[PATCH V2] staging: mt7621-eth: Fix memory leak in mtk_add_mac() error path

[Kamal Heib]

On Mon, Jun 18, 2018 at 10:52:01AM +0200, Greg Kroah-Hartman wrote:
> On Sat, Jun 16, 2018 at 01:01:27PM +0300, Kamal Heib wrote:
> > Fix memory leak in error path of mtk_add_mac() by make sure to free
> > the allocated netdev.
> > 
> > Fixes: e3cbf478f846 ('staging: mt7621-eth: add the drivers core files')
> > Signed-off-by: Kamal Heib <kamalheib1 at gmail.com>
> > ---
> > Changes from v1:
> > 	No need to free the hw_stats.
> > 
> >  drivers/staging/mt7621-eth/mtk_eth_soc.c | 14 +++++++++++---
> >  1 file changed, 11 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/staging/mt7621-eth/mtk_eth_soc.c b/drivers/staging/mt7621-eth/mtk_eth_soc.c
> > index 2c7a2e666bfb..c240c27dc654 100644
> > --- a/drivers/staging/mt7621-eth/mtk_eth_soc.c
> > +++ b/drivers/staging/mt7621-eth/mtk_eth_soc.c
> > @@ -2012,8 +2012,11 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
> >  		mac->hw_stats = devm_kzalloc(eth->dev,
> >  					     sizeof(*mac->hw_stats),
> >  					     GFP_KERNEL);
> > -		if (!mac->hw_stats)
> > -			return -ENOMEM;
> > +		if (!mac->hw_stats) {
> > +			dev_err(eth->dev, "failed to allocate hw_stats\n");
> 
> No need to shout about an error, when memory allocation fails, there
> will be a message sent to the kernel log about it.
> 
> thanks,
> 
> greg k-h

I'll fix it soon.

Thanks,
Kamal