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authorMaxim Levitsky <maximlevitsky@gmail.com>2007-03-06 02:41:52 -0800
committerJeff Garzik <jeff@garzik.org>2007-03-06 06:10:02 -0500
commit4dc68f3de5e36d72663bb51b94662d2d5db84125 (patch)
treef5dd7ac3fce58e5f4e760a1c7b212230321eeeb5
parentf67ba792fa10e3a65226d53dccc1232908d86c20 (diff)
dmfe: fix two bugs
Fix a oops on module removal due to deallocating memory before unregistring driver Fix a NULL pointer dereference when dev_alloc_skb fails Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Valerie Henson <val_henson@linux.intel.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/net/tulip/dmfe.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/net/tulip/dmfe.c b/drivers/net/tulip/dmfe.c
index fc4a2125b50..afd5e527032 100644
--- a/drivers/net/tulip/dmfe.c
+++ b/drivers/net/tulip/dmfe.c
@@ -501,14 +501,17 @@ static void __devexit dmfe_remove_one (struct pci_dev *pdev)
DMFE_DBUG(0, "dmfe_remove_one()", 0);
if (dev) {
+
+ unregister_netdev(dev);
+
pci_free_consistent(db->pdev, sizeof(struct tx_desc) *
DESC_ALL_CNT + 0x20, db->desc_pool_ptr,
db->desc_pool_dma_ptr);
pci_free_consistent(db->pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
db->buf_pool_ptr, db->buf_pool_dma_ptr);
- unregister_netdev(dev);
pci_release_regions(pdev);
free_netdev(dev); /* free board information */
+
pci_set_drvdata(pdev, NULL);
}
@@ -927,7 +930,7 @@ static inline u32 cal_CRC(unsigned char * Data, unsigned int Len, u8 flag)
static void dmfe_rx_packet(struct DEVICE *dev, struct dmfe_board_info * db)
{
struct rx_desc *rxptr;
- struct sk_buff *skb;
+ struct sk_buff *skb, *newskb;
int rxlen;
u32 rdes0;
@@ -980,9 +983,11 @@ static void dmfe_rx_packet(struct DEVICE *dev, struct dmfe_board_info * db)
} else {
/* Good packet, send to upper layer */
/* Shorst packet used new SKB */
- if ( (rxlen < RX_COPY_SIZE) &&
- ( (skb = dev_alloc_skb(rxlen + 2) )
- != NULL) ) {
+ if ((rxlen < RX_COPY_SIZE) &&
+ ((newskb = dev_alloc_skb(rxlen + 2))
+ != NULL)) {
+
+ skb = newskb;
/* size less than COPY_SIZE, allocate a rxlen SKB */
skb->dev = dev;
skb_reserve(skb, 2); /* 16byte align */