From: David Oostdyk <daveo@ll•mit.edu>
To: <netdev@vger•kernel.org>
Cc: <macro@linux-mips•org>
Subject: defxx: skb_push() failing?
Date: Tue, 26 Mar 2013 10:29:34 -0400 [thread overview]
Message-ID: <5151B0CE.5000000@ll.mit.edu> (raw)
Hello,
In dfx_xmt_queue_pkt() in defxx.c, there is a skb_push(3) call which
makes room for 3 packet request header bytes. There is some discussion
in the driver explaining why those three bytes will be available. I
have an old FDDI card that I'm trying to bring up:
05:05.0 FDDI network controller: Digital Equipment Corporation
PCI-to-PDQ Interface Chip [PFI] (rev 02)
Most skbuffs that come through dfx_xmit_queue_pkt() have 11 bytes
between skb->head and skb->data. On the other hand, at almost exactly
60-second intervals, an skb arrives that has zero bytes between
skb->head and skb->data. This normally causes a kernel panic, and for
the time I just skip over such skb's.
Does anyone have advice on where I should start digging to find the
cause of this?
Thanks in advance!
- David Oostdyk
next reply other threads:[~2013-03-26 14:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-26 14:29 David Oostdyk [this message]
2013-03-26 15:15 ` defxx: skb_push() failing? Eric Dumazet
2013-03-26 16:03 ` David Oostdyk
2013-03-26 16:30 ` Eric Dumazet
2013-03-26 18:45 ` David Oostdyk
2013-03-26 19:00 ` Maciej W. Rozycki
2013-03-28 4:11 ` David Oostdyk
2013-03-28 4:28 ` [PATCH] aoe: reserve enough headroom on skbs Eric Dumazet
2013-03-28 18:30 ` David Miller
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