From: Michael Chan Date: Tue, 10 Jul 2012 10:04:40 +0000 (+0000) Subject: bnx2: Fix bug in bnx2_free_tx_skbs(). X-Git-Tag: v3.5~24^2~11 X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=c1f5163de417dab01fa9daaf09a74bbb19303f3c;p=~emulex%2Finfiniband.git bnx2: Fix bug in bnx2_free_tx_skbs(). In rare cases, bnx2x_free_tx_skbs() can unmap the wrong DMA address when it gets to the last entry of the tx ring. We were not using the proper macro to skip the last entry when advancing the tx index. Reported-by: Zongyun Lai Reviewed-by: Jeffrey Huang Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c index ac7b7448853..1fa4927a45b 100644 --- a/drivers/net/ethernet/broadcom/bnx2.c +++ b/drivers/net/ethernet/broadcom/bnx2.c @@ -5372,7 +5372,7 @@ bnx2_free_tx_skbs(struct bnx2 *bp) int k, last; if (skb == NULL) { - j++; + j = NEXT_TX_BD(j); continue; } @@ -5384,8 +5384,8 @@ bnx2_free_tx_skbs(struct bnx2 *bp) tx_buf->skb = NULL; last = tx_buf->nr_frags; - j++; - for (k = 0; k < last; k++, j++) { + j = NEXT_TX_BD(j); + for (k = 0; k < last; k++, j = NEXT_TX_BD(j)) { tx_buf = &txr->tx_buf_ring[TX_RING_IDX(j)]; dma_unmap_page(&bp->pdev->dev, dma_unmap_addr(tx_buf, mapping),