[PATCH 1/3] atm: nicstar: Unmap DMA on send error

[Sebastian Andrzej Siewior]

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 <3ch...@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
---
 drivers/atm/nicstar.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 7af74fb450a0d..09ad73361879e 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;
        }
-- 
2.29.2