| Message ID | 20170821220617.21513-1-christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, 22 Aug 2017 00:06:17 +0200, Christophe JAILLET wrote: > Check memory allocation failure and return -ENOMEM in such a case, as > already done a few lines below. > > As 'dev->tx_q' can be NULL, we also need to check for that in > 'mt7601u_free_tx()', and return early. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Jakub Kicinski <kubakici@wp.pl>
Christophe Jaillet <christophe.jaillet@wanadoo.fr> wrote: > Check memory allocation failure and return -ENOMEM in such a case, as > already done a few lines below. > > As 'dev->tx_q' can be NULL, we also need to check for that in > 'mt7601u_free_tx()', and return early. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > Acked-by: Jakub Kicinski <kubakici@wp.pl> Patch applied to wireless-drivers-next.git, thanks. b3b2f62c6238 mt7601u: check memory allocation failure
diff --git a/drivers/net/wireless/mediatek/mt7601u/dma.c b/drivers/net/wireless/mediatek/mt7601u/dma.c index 660267b359e4..7f3e3983b781 100644 --- a/drivers/net/wireless/mediatek/mt7601u/dma.c +++ b/drivers/net/wireless/mediatek/mt7601u/dma.c @@ -457,6 +457,9 @@ static void mt7601u_free_tx(struct mt7601u_dev *dev) { int i; + if (!dev->tx_q) + return; + for (i = 0; i < __MT_EP_OUT_MAX; i++) mt7601u_free_tx_queue(&dev->tx_q[i]); } @@ -484,6 +487,8 @@ static int mt7601u_alloc_tx(struct mt7601u_dev *dev) dev->tx_q = devm_kcalloc(dev->dev, __MT_EP_OUT_MAX, sizeof(*dev->tx_q), GFP_KERNEL); + if (!dev->tx_q) + return -ENOMEM; for (i = 0; i < __MT_EP_OUT_MAX; i++) if (mt7601u_alloc_tx_queue(dev, &dev->tx_q[i]))
Check memory allocation failure and return -ENOMEM in such a case, as already done a few lines below. As 'dev->tx_q' can be NULL, we also need to check for that in 'mt7601u_free_tx()', and return early. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- v2: avoid another NULL pointer dereference in 'mt7601u_free_tx()' if the allocation had failed. --- drivers/net/wireless/mediatek/mt7601u/dma.c | 5 +++++ 1 file changed, 5 insertions(+)