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| author | Yan Markman <ymarkman@marvell.com> | 2017-11-30 12:49:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 13:07:55 +0300 |
| commit | d4ec37fab6008e17a1f2af26db8c6a801c9f7ec6 (patch) | |
| tree | f6f7d3277218f5b9fe72c56c515fe6267062975f /drivers/net/ethernet/marvell | |
| parent | 801f3b0c40da62ddc27dbd3e06331c8144cf394e (diff) | |
| download | linux-d4ec37fab6008e17a1f2af26db8c6a801c9f7ec6.tar.xz | |
net: mvpp2: allocate zeroed tx descriptors
[ 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>
Diffstat (limited to 'drivers/net/ethernet/marvell')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvpp2.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c index 06f3fe429d82..529be74f609d 100644 --- 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 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) |