Message ID | 20171130094946.26647-1-antoine.tenart@free-electrons.com |
---|---|
State | Accepted, archived |
Delegated to: | David Miller |
Headers | show |
Series | [net] net: mvpp2: allocate zeroed tx descriptors | expand |
From: Antoine Tenart <antoine.tenart@free-electrons.com> Date: Thu, 30 Nov 2017 10:49:46 +0100 > From: Yan Markman <ymarkman@marvell.com> > > 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> Applied, thank you.
diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index d83a78be98a2..fed2b2f909fc 100644 --- a/drivers/net/ethernet/marvell/mvpp2.c +++ b/drivers/net/ethernet/marvell/mvpp2.c @@ -5598,7 +5598,7 @@ static int mvpp2_aggr_txq_init(struct platform_device *pdev, 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)