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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2020-11-16 17:21:14 +0100
committerJakub Kicinski <kuba@kernel.org>2020-11-19 01:42:07 +0100
commit6dceaa9f56e22d0f9b4c4ad2ed9e04e315ce7fe5 (patch)
tree64bcf02a80ddf3c915c55c92af4cd3b8f374c052 /drivers/atm
parentpage_frag: Recover from memory pressure (diff)
downloadlinux-6dceaa9f56e22d0f9b4c4ad2ed9e04e315ce7fe5.tar.xz
linux-6dceaa9f56e22d0f9b4c4ad2ed9e04e315ce7fe5.zip
atm: nicstar: Unmap DMA on send error
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>
Diffstat (limited to 'drivers/atm')
-rw-r--r--drivers/atm/nicstar.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 7af74fb450a0..09ad73361879 100644
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c
@@ -1706,6 +1706,8 @@ static int ns_send(struct atm_vcc *vcc, struct sk_buff *skb)
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;
}