From: Sebastian Andrzej Siewior bigeasy@linutronix.de
[ Upstream commit 6dceaa9f56e22d0f9b4c4ad2ed9e04e315ce7fe5 ]
The `skb' is mapped for DMA in ns_send() but does not unmap DMA in case push_scqe() fails to submit the `skb'. The memory of the `skb' is released so only the DMA mapping is leaking.
Unmap the DMA mapping in case push_scqe() failed.
Fixes: 864a3ff635fa7 ("atm: [nicstar] remove virt_to_bus() and support 64-bit platforms") Cc: Chas Williams 3chas3@gmail.com Signed-off-by: Sebastian Andrzej Siewior bigeasy@linutronix.de Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/atm/nicstar.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/atm/nicstar.c +++ b/drivers/atm/nicstar.c @@ -1704,6 +1704,8 @@ static int ns_send(struct atm_vcc *vcc,
if (push_scqe(card, vc, scq, &scqe, skb) != 0) { atomic_inc(&vcc->stats->tx_err); + dma_unmap_single(&card->pcidev->dev, NS_PRV_DMA(skb), skb->len, + DMA_TO_DEVICE); dev_kfree_skb_any(skb); return -EIO; }