You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
1.2 KiB
34 lines
1.2 KiB
12 years ago
|
From cae49ede00ec3d0cda290b03fee55b72b49efc11 Mon Sep 17 00:00:00 2001
|
||
|
|
From: David Woodhouse <dwmw2@infradead.org>
|
||
|
|
Date: Tue, 11 Dec 2012 14:57:14 +0000
|
||
|
|
Subject: [PATCH] solos-pci: fix double-free of TX skb in DMA mode
|
||
|
|
|
||
|
|
We weren't clearing card->tx_skb[port] when processing the TX done interrupt.
|
||
|
|
If there wasn't another skb ready to transmit immediately, this led to a
|
||
|
|
double-free because we'd free it *again* next time we did have a packet to
|
||
|
|
send.
|
||
|
|
|
||
|
|
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
|
||
|
|
Cc: stable@kernel.org
|
||
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
||
|
|
---
|
||
|
|
drivers/atm/solos-pci.c | 5 +++--
|
||
|
|
1 file changed, 3 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/atm/solos-pci.c
|
||
|
|
+++ b/drivers/atm/solos-pci.c
|
||
|
|
@@ -945,10 +945,11 @@ static uint32_t fpga_tx(struct solos_car
|
||
|
|
for (port = 0; tx_pending; tx_pending >>= 1, port++) {
|
||
|
|
if (tx_pending & 1) {
|
||
|
|
struct sk_buff *oldskb = card->tx_skb[port];
|
||
|
|
- if (oldskb)
|
||
|
|
+ if (oldskb) {
|
||
|
|
pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
|
||
|
|
oldskb->len, PCI_DMA_TODEVICE);
|
||
|
|
-
|
||
|
|
+ card->tx_skb[port] = NULL;
|
||
|
|
+ }
|
||
|
|
spin_lock(&card->tx_queue_lock);
|
||
|
|
skb = skb_dequeue(&card->tx_queue[port]);
|
||
|
|
if (!skb)
|