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Date: Tue, 20 May 2008 10:41:45 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Rune Torgersen <runet@innovsys.com>
Subject: Re: Oops in fs_enet driver with preempt-rt
References: <DCEAAC0833DD314AB0B58112AD99B93B046E728C@ismail.innsys.innovsys.com>
	<DCEAAC0833DD314AB0B58112AD99B93B046E72C3@ismail.innsys.innovsys.com>
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Rune Torgersen wrote:
> 0xc0196d84 is in fs_enet_interrupt
> (drivers/net/fs_enet/fs_enet-main.c:473).
> 468                     if (fpi->use_napi)
> 469                             int_clr_events &= ~fep->ev_napi_rx;
> 470
> 471                     (*fep->ops->clear_int_events)(dev,
> int_clr_events);
> 472
> 473                     if (int_events & fep->ev_err)
> 474                             (*fep->ops->ev_error)(dev, int_events);
> 475
> 476                     if (int_events & fep->ev_rx) {
> 477                             if (!fpi->use_napi)
> (gdb)     

Do you have shared interrupt debugging turned on?  That breaks this 
driver, and a patch to remove the shared flag was nacked in favor of 
actually fixing the driver, which I haven't gotten around to.

-Scott

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Date: Tue, 20 May 2008 10:41:45 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Rune Torgersen <runet@innovsys.com>
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       netdev@vger.kernel.org
Subject: Re: Oops in fs_enet driver with preempt-rt
References: <DCEAAC0833DD314AB0B58112AD99B93B046E728C@ismail.innsys.innovsys.com> <DCEAAC0833DD314AB0B58112AD99B93B046E72C3@ismail.innsys.innovsys.com>
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Rune Torgersen wrote:
> 0xc0196d84 is in fs_enet_interrupt
> (drivers/net/fs_enet/fs_enet-main.c:473).
> 468                     if (fpi->use_napi)
> 469                             int_clr_events &= ~fep->ev_napi_rx;
> 470
> 471                     (*fep->ops->clear_int_events)(dev,
> int_clr_events);
> 472
> 473                     if (int_events & fep->ev_err)
> 474                             (*fep->ops->ev_error)(dev, int_events);
> 475
> 476                     if (int_events & fep->ev_rx) {
> 477                             if (!fpi->use_napi)
> (gdb)     

Do you have shared interrupt debugging turned on?  That breaks this 
driver, and a patch to remove the shared flag was nacked in favor of 
actually fixing the driver, which I haven't gotten around to.

-Scott