On Wed, Jun 14, 2006 at 10:47:20PM +0200, Francois Romieu wrote:
> Grant Grundler <[EMAIL PROTECTED]> :
> [...]
> > I'm not keen on adding more code to tulip_interrupt() routine
> > for something that rarely happens (compared to IRQs) and is handled
> > outside the interrupt routine. I'm pretty sure stopping interrupts
> > before stopping DMA is sufficient.
> > Can you show an example where it doesn't work?
>
> Shared irq.
>
> The device has not quiesced, the kernel stop listening to it and the
> neighbor device receives a late interruption from the network device.
I thought we've worked through that already:
http://www.spinics.net/lists/netdev/msg05902.html
Patch v3 takes care of that problem.
The first step in the sequence is to mask IRQs on the tulip.
The "neighbor" device sharing the IRQ will not see any interrupts from
the tulip after that.
thanks,
grant
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