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Fix memory corruption in fec_mpc52xx 

The mpc5200 fec driver is corrupting memory. This patch fixes two bugs
where the wrong skb was being referenced.

Signed-off-by: Jon Smirl <jonsmirl@gmail.com>
Acked-by: Domen Puncer <domen.puncer@telargo.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jon Smirl 2007-12-03 22:38:10 +00:00 committed by Jeff Garzik
parent 0581d3f530
commit 4c537e6371
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/fec_mpc52xx.c
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@ -422,7 +422,7 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
(struct bcom_bd **)&bd);
dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
/* Test for errors in received frame */
if (status & BCOM_FEC_RX_BD_ERRORS) {
@ -467,7 +467,7 @@ static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
bcom_prepare_next_buffer(priv->rx_dmatsk);
bd->status = FEC_RX_BUFFER_SIZE;
bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
bd->skb_pa = dma_map_single(&dev->dev, skb->data,
FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
bcom_submit_next_buffer(priv->rx_dmatsk, skb);