Date: Mon, 10 May 2004 18:32:12 +0200 From: Fabien THOMAS <fabien.thomas@netasq.com> To: freebsd-net@freebsd.org Subject: em driver problem (system lock) Message-ID: <409FAE8C.1030706@netasq.com>
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Hi,
We use a lot of intel gigabit card and since the first
time we use it we experience some strange hard lock of the system
(4.9|FreeBSD-stable). We have tried several driver version (it is not
related to a version). We use the card in polling mode but it seems that
the problem can be fired even in interrupt mode.
What i found during the debugging on a fiber card:
1) original driver did not lock but when the other end is rebooted i've
around 10 linkup/linkdown
2) removing linkup/linkdown printf: driver lock each time the other end
system is rebooted!
3) removing the E1000_IMC_RXSEQ in disable_intr correct the lock but i
do not understand why:
a) E1000_IMC_RXSEQ need to be left when disabling intr?
b) the system completly lock (even under debugger) for just an
interrupt source enabled?
static void
em_disable_intr(struct adapter *adapter)
{
E1000_WRITE_REG(&adapter->hw, IMC,
(0xffffffff));/* & ~E1000_IMC_RXSEQ));*/
return;
}
What do you think of that ?
fabien
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