Patch "net: mvpp2: allocate zeroed tx descriptors" has been added to the 4.14-stable tree

Patch "net: mvpp2: allocate zeroed tx descriptors" has been added to the 4.14-stable tree

[gregkh]

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@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