From fd3686a842717b890fbe3024b83a616c54d5dba0 Mon Sep 17 00:00:00 2001 From: Mallikarjuna R Chilakala Date: Fri, 19 Mar 2010 04:41:33 +0000 Subject: [PATCH] ixgbe: Set IXGBE_RSC_CB(skb)->DMA field to zero after unmapping the address As per Simon Horman's feedback set IXGBE_RSC_CB(skb)->dma to zero after unmapping HWRSC DMA address to avoid double freeing. Signed-off-by: Mallikarjuna R Chilakala Acked-by: Peter P Waskiewicz Jr Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_main.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 18b5b217f310..d75c46ff31f6 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -935,10 +935,12 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector, if (skb->prev) skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count)); if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) { - if (IXGBE_RSC_CB(skb)->dma) + if (IXGBE_RSC_CB(skb)->dma) { pci_unmap_single(pdev, IXGBE_RSC_CB(skb)->dma, rx_ring->rx_buf_len, PCI_DMA_FROMDEVICE); + IXGBE_RSC_CB(skb)->dma = 0; + } if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) rx_ring->rsc_count += skb_shinfo(skb)->nr_frags; else @@ -3126,10 +3128,12 @@ static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter, rx_buffer_info->skb = NULL; do { struct sk_buff *this = skb; - if (IXGBE_RSC_CB(this)->dma) + if (IXGBE_RSC_CB(this)->dma) { pci_unmap_single(pdev, IXGBE_RSC_CB(this)->dma, rx_ring->rx_buf_len, PCI_DMA_FROMDEVICE); + IXGBE_RSC_CB(this)->dma = 0; + } skb = skb->prev; dev_kfree_skb(this); } while (skb); -- GitLab