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Date: Sat, 28 Sep 2013 16:22:16 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Hauke Mehrtens <hauke@...ke-m.de> Cc: davem@...emloft.net, zajec5@...il.com, netdev@...r.kernel.org Subject: Re: [PATCH v2] bgmac: add support for Byte Queue Limits On Sat, 2013-09-28 at 16:03 -0700, Eric Dumazet wrote: > Unfortunately, skb->len is unsafe : hardware might already sent the > packet and TX completion have freed it. > > You must cache skb->len in a variable before allowing hardware to send > the frame. > More exactly you must call netdev_sent_queue() _before_ giving skb to hardware, or netdev_completed_queue() might panic. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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