[PATCH AUTOSEL for 4.9 035/156] qed: Fix mapping leak on LL2 rx flow

[alexander . levin]

From: "Mintz, Yuval" <yuval.mi...@cavium.com>

[ Upstream commit 752ecb2da11124a948567076b60767dc8034cfa5 ]

When receiving an Rx LL2 packet, qed fails to unmap the previous buffer.

Fixes: 0a7fb11c23c0 ("qed: Add Light L2 support");
Signed-off-by: Yuval Mintz <yuval.mi...@cavium.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
---
 drivers/net/ethernet/qlogic/qed/qed_ll2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c 
b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
index 62ae55bd81b8..7f00c7b065cb 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_ll2.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c
@@ -187,6 +187,8 @@ static void qed_ll2b_complete_rx_packet(struct qed_hwfn 
*p_hwfn,
        /* If need to reuse or there's no replacement buffer, repost this */
        if (rc)
                goto out_post;
+       dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
+                        cdev->ll2->rx_size, DMA_FROM_DEVICE);
 
        skb = build_skb(buffer->data, 0);
        if (!skb) {
-- 
2.11.0