Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts

From: Francois Romieu
Date: Sun May 24 2009 - 17:15:25 EST

David Dillow <dave@xxxxxxxxxxxxxx> :
> This fixes the lockups I've seen. Both MSI and level-triggered interrupt
> configurations survive over an hour of testing when it would lockup in
> under 90 seconds before. I am certain of the analysis of the root cause,
> but there may be better ways to fix it. There may also be a theoretical
> race window between the ending of a NAPI poll cycle and a link change
> interrupt coming in, but I'm not sure it would matter.

It makes sense.

If I understand correctly, one should expect to find some pending Tx
event in the ISR of a failed card when reading the registers with

Has someone noticed it ?

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