From: [EMAIL PROTECTED] Date: Sun, 25 Jun 2006 01:47:30 -0700 > The netpoll system currently has a rx to tx path via: > > netpoll_rx > __netpoll_rx > arp_reply > netpoll_send_skb > dev->hard_start_tx > > This rx->tx loop places network drivers at risk of inadvertently causing a > deadlock or BUG halt by recursively trying to acquire a spinlock that is > used in both their rx and tx paths (this problem was origionally reported > to me in the 3c59x driver, which shares a spinlock between the > boomerang_interrupt and boomerang_start_xmit routines). > > This patch breaks this loop, by queueing arp frames, so that they can be > responded to after all receive operations have been completed. Tested by > myself and the reported with successful results. > > Specifically it was tested with netdump. Heres the BZ with details: > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=194055 > > Signed-off-by: Neil Horman <[EMAIL PROTECTED]> > Acked-by: Matt Mackall <[EMAIL PROTECTED]> > Cc: "David S. Miller" <[EMAIL PROTECTED]> > Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
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