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%3Ba=su...

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@vger.kernel.org know about it.

From foo@baz Fri Feb 23 11:45:09 CET 2018

From: Yan Markman ymarkman@marvell.com Date: Thu, 30 Nov 2017 10:49:46 +0100 Subject: net: mvpp2: allocate zeroed tx descriptors

From: Yan Markman ymarkman@marvell.com

[ 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@marvell.com [Antoine: commit message] Signed-off-by: Antoine Tenart antoine.tenart@free-electrons.com Signed-off-by: David S. Miller davem@davemloft.net

Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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@marvell.com are

queue-4.14/net-mvpp2-allocate-zeroed-tx-descriptors.patch