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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-10-22 03:29:53 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-22 03:29:53 -0400 |
| commit | f7ff19871bb4a3451e1ca2cf660bf633018cfbec (patch) | |
| tree | ffbbfd627d08f90774be98ad8c0e33fb4f732974 /drivers | |
| parent | 580043a27da2bd8201ee321a0d5550c629fcab8d (diff) | |
| download | linux-3.10-f7ff19871bb4a3451e1ca2cf660bf633018cfbec.tar.gz linux-3.10-f7ff19871bb4a3451e1ca2cf660bf633018cfbec.tar.bz2 linux-3.10-f7ff19871bb4a3451e1ca2cf660bf633018cfbec.zip | |
tg3: fix tigon3_dma_hwbug_workaround()
Ari got kernel panics using tg3 NIC, and bisected to 2669069aacc9 "tg3:
enable transmit time stamping."
This is because tigon3_dma_hwbug_workaround() might alloc a new skb and
free the original. We panic when skb_tx_timestamp() is called on freed
skb.
Reported-by: Ari Savolainen <ari.m.savolainen@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/tg3.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index c11a2b8327f..d469004704a 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -6029,12 +6029,12 @@ static void tg3_tx_skb_unmap(struct tg3_napi *tnapi, u32 entry, int last) /* Workaround 4GB and 40-bit hardware DMA bugs. */ static int tigon3_dma_hwbug_workaround(struct tg3_napi *tnapi, - struct sk_buff *skb, + struct sk_buff **pskb, u32 *entry, u32 *budget, u32 base_flags, u32 mss, u32 vlan) { struct tg3 *tp = tnapi->tp; - struct sk_buff *new_skb; + struct sk_buff *new_skb, *skb = *pskb; dma_addr_t new_addr = 0; int ret = 0; @@ -6076,7 +6076,7 @@ static int tigon3_dma_hwbug_workaround(struct tg3_napi *tnapi, } dev_kfree_skb(skb); - + *pskb = new_skb; return ret; } @@ -6305,7 +6305,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) */ entry = tnapi->tx_prod; budget = tg3_tx_avail(tnapi); - if (tigon3_dma_hwbug_workaround(tnapi, skb, &entry, &budget, + if (tigon3_dma_hwbug_workaround(tnapi, &skb, &entry, &budget, base_flags, mss, vlan)) goto out_unlock; } |