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authorPrashant Sreedharan <prashant@broadcom.com>2014-06-19 05:38:13 +0400
committerDavid S. Miller <davem@davemloft.net>2014-06-20 07:55:49 +0400
commit40c1deaf6c2b42d7ee4e604ba5793cf9da292d96 (patch)
treed029ec5177916822721a345c1f1c9c95780b726e /drivers/net/ethernet
parent2cd0d743b05e87445c54ca124a9916f22f16742e (diff)
downloadlinux-40c1deaf6c2b42d7ee4e604ba5793cf9da292d96.tar.xz
tg3: Clear NETIF_F_TSO6 flag before doing software GSO
Commit d3f6f3a1d818410c17445bce4f4caab52eb102f1 ("tg3: Prevent page allocation failure during TSO workaround") modified driver logic to use tg3_tso_bug() for any TSO fragment that hits hardware bug conditions thus the patch increased the scope of work for tg3_tso_bug() to cover devices that support NETIF_F_TSO6 as well. Prior to the patch, tg3_tso_bug() would only be used on devices supporting NETIF_F_TSO. A regression was introduced for IPv6 packets requiring the workaround. To properly perform GSO on SKBs with TCPV6 gso_type, we need to call skb_gso_segment() with NETIF_F_TSO6 feature flag cleared, or the function will return NULL and cause a kernel oops as tg3 is not handling a NULL return value. This patch fixes the problem. Signed-off-by: Prashant Sreedharan <prashant@broadcom.com> Signed-off-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r--drivers/net/ethernet/broadcom/tg3.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index df2792d8383d..c2ff6881a673 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7854,8 +7854,8 @@ static int tg3_tso_bug(struct tg3 *tp, struct sk_buff *skb)
netif_wake_queue(tp->dev);
}
- segs = skb_gso_segment(skb, tp->dev->features & ~NETIF_F_TSO);
- if (IS_ERR(segs))
+ segs = skb_gso_segment(skb, tp->dev->features & ~(NETIF_F_TSO | NETIF_F_TSO6));
+ if (IS_ERR(segs) || !segs)
goto tg3_tso_bug_end;
do {