This is a note to let you know that I've just added the patch titled
atm: nicstar: Unmap DMA on send error
to the 5.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
atm-nicstar-unmap-dma-on-send-error.patch
and it can be found in the queue-5.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sun Nov 22 10:24:40 AM CET 2020
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Date: Mon, 16 Nov 2020 17:21:14 +0100
Subject: atm: nicstar: Unmap DMA on send error
From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
[ 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@xxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/atm/nicstar.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c
@@ -1706,6 +1706,8 @@ 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;
}
Patches currently in stable-queue which might be from bigeasy@xxxxxxxxxxxxx are
queue-5.9/atm-nicstar-unmap-dma-on-send-error.patch
