From 938fa48843b8d020a1dfc9cf340e09347132b7c4 Mon Sep 17 00:00:00 2001 From: Rasesh Mody Date: Tue, 30 Aug 2011 15:27:47 +0000 Subject: [PATCH] bna: SKB PCI UNMAP Fix Change details: - Found a leak in sk_buff unmapping of PCI dma addresses where boundary conditions are not properly handled in freeing all Tx buffers. Freeing of all Tx buffers is done considering sk_buffs data and fragments can be mapped at the boundary. Signed-off-by: Gurunatha Karaje Signed-off-by: Rasesh Mody Signed-off-by: David S. Miller --- drivers/net/ethernet/brocade/bna/bnad.c | 35 ++++++------------------- 1 file changed, 8 insertions(+), 27 deletions(-) diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index 11990cf0a265..3a409172992e 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -137,39 +137,20 @@ bnad_free_all_txbufs(struct bnad *bnad, struct bnad_unmap_q *unmap_q = tcb->unmap_q; struct bnad_skb_unmap *unmap_array; struct sk_buff *skb = NULL; - int i; + int q; unmap_array = unmap_q->unmap_array; - unmap_cons = 0; - while (unmap_cons < unmap_q->q_depth) { - skb = unmap_array[unmap_cons].skb; - if (!skb) { - unmap_cons++; + for (q = 0; q < unmap_q->q_depth; q++) { + skb = unmap_array[q].skb; + if (!skb) continue; - } - unmap_array[unmap_cons].skb = NULL; - - dma_unmap_single(&bnad->pcidev->dev, - dma_unmap_addr(&unmap_array[unmap_cons], - dma_addr), skb_headlen(skb), - DMA_TO_DEVICE); - dma_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, 0); - if (++unmap_cons >= unmap_q->q_depth) - break; + unmap_cons = q; + unmap_cons = bnad_pci_unmap_skb(&bnad->pcidev->dev, unmap_array, + unmap_cons, unmap_q->q_depth, skb, + skb_shinfo(skb)->nr_frags); - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { - dma_unmap_page(&bnad->pcidev->dev, - dma_unmap_addr(&unmap_array[unmap_cons], - dma_addr), - skb_shinfo(skb)->frags[i].size, - DMA_TO_DEVICE); - dma_unmap_addr_set(&unmap_array[unmap_cons], dma_addr, - 0); - if (++unmap_cons >= unmap_q->q_depth) - break; - } dev_kfree_skb_any(skb); } } -- 2.30.2