4.14-stable review patch. If anyone has any objections, please let me know.
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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)