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authorLinas Vepstas <linas@austin.ibm.com>2006-12-13 15:15:15 -0600
committerJeff Garzik <jeff@garzik.org>2007-02-05 16:58:44 -0500
commit05b346b552e13cc090ea908e2be183b377ff30a2 (patch)
tree2ff85c154bc808f6567f014e0b57df9bf0591e37 /drivers/net/spider_net.c
parent1cd173f66c392ede57fa10f614fca22d79501424 (diff)
Spidernet RX skb mem leak
One of the unlikely error branches has an skb memory leak. Fix this by handling the error conditions consistently. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Cc: James K Lewis <jklewis@us.ibm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/spider_net.c')
-rw-r--r--drivers/net/spider_net.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index f97251a9c85..f1cd13fbd5c 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -913,8 +913,8 @@ spider_net_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
*
* returns 1 on success, 0 if no packet was passed to the stack
*
- * iommu-unmaps the skb, fills out skb structure and passes the data to the
- * stack. The descriptor state is not changed.
+ * Fills out skb structure and passes the data to the stack.
+ * The descriptor state is not changed.
*/
static int
spider_net_pass_skb_up(struct spider_net_descr *descr,
@@ -929,10 +929,6 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
netdev = card->netdev;
- /* unmap descriptor */
- pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
- PCI_DMA_FROMDEVICE);
-
/* the cases we'll throw away the packet immediately */
if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
if (netif_msg_rx_err(card))
@@ -1015,6 +1011,11 @@ spider_net_decode_one_descr(struct spider_net_card *card)
chain->tail = descr->next;
result = 0;
+
+ /* unmap descriptor */
+ pci_unmap_single(card->pdev, descr->buf_addr,
+ SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
+
if ( (status == SPIDER_NET_DESCR_RESPONSE_ERROR) ||
(status == SPIDER_NET_DESCR_PROTECTION_ERROR) ||
(status == SPIDER_NET_DESCR_FORCE_END) ) {
@@ -1022,8 +1023,6 @@ spider_net_decode_one_descr(struct spider_net_card *card)
pr_err("%s: dropping RX descriptor with state %d\n",
card->netdev->name, status);
card->netdev_stats.rx_dropped++;
- pci_unmap_single(card->pdev, descr->buf_addr,
- SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
dev_kfree_skb_irq(descr->skb);
goto refill;
}
@@ -1031,9 +1030,10 @@ spider_net_decode_one_descr(struct spider_net_card *card)
if ( (status != SPIDER_NET_DESCR_COMPLETE) &&
(status != SPIDER_NET_DESCR_FRAME_END) ) {
if (netif_msg_rx_err(card))
- pr_err("%s: RX descriptor with state %d\n",
+ pr_err("%s: RX descriptor with unkown state %d\n",
card->netdev->name, status);
card->spider_stats.rx_desc_unk_state++;
+ dev_kfree_skb_irq(descr->skb);
goto refill;
}