This is a note to let you know that I've just added the patch titled
net: mvpp2: allocate zeroed tx descriptors
to the 4.14-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:
net-mvpp2-allocate-zeroed-tx-descriptors.patch
and it can be found in the queue-4.14 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 Fri Feb 23 11:45:09 CET 2018
From: Yan Markman <ymarkman@xxxxxxxxxxx>
Date: Thu, 30 Nov 2017 10:49:46 +0100
Subject: net: mvpp2: allocate zeroed tx descriptors
From: Yan Markman <ymarkman@xxxxxxxxxxx>
[ Upstream commit a154f8e399a063137fc42b961f437248d55ece29 ]
Reserved and unused fields in the Tx descriptors should be 0. The PPv2
driver doesn't clear them at run-time (for performance reasons) but
these descriptors aren't zeroed when allocated, which can lead to
unpredictable behaviors. This patch fixes this by using
dma_zalloc_coherent instead of dma_alloc_coherent.
Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit")
Signed-off-by: Yan Markman <ymarkman@xxxxxxxxxxx>
[Antoine: commit message]
Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/marvell/mvpp2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -5399,7 +5399,7 @@ static int mvpp2_aggr_txq_init(struct pl
u32 txq_dma;
/* Allocate memory for TX descriptors */
- aggr_txq->descs = dma_alloc_coherent(&pdev->dev,
+ aggr_txq->descs = dma_zalloc_coherent(&pdev->dev,
MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE,
&aggr_txq->descs_dma, GFP_KERNEL);
if (!aggr_txq->descs)
Patches currently in stable-queue which might be from ymarkman@xxxxxxxxxxx are
queue-4.14/net-mvpp2-allocate-zeroed-tx-descriptors.patch