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Date:	Mon, 5 May 2008 01:15:07 +0400
From:	Alexey Dobriyan <>
To:	Jay Cliburn <>
Cc:	Luca Tettamanti <>,
	Chris Snook <>, Jeff Garzik <>,
	Pekka Enberg <>,
	Andrew Morton <>,,,
	Christoph Lameter <>,
Subject: Re: atl1 64-bit => 32-bit DMA borkage (reproducible, bisected)

Looking at how other netdevice drivers:

8139too and others checks netif_running() in interrupt handler.

r8169 has scary "50k$" question comment re irqs disabled after
interacting with hardware.

But the r8169 case should be fixed by atlx_irq_disable()?

Writes to REG_IMR, REG_ISR are commented in atl1_reset_hw(), why?
(I'll test that soon)

Do we have a theory why changing from 64-bit DMA mask to 32-bit mask
resurrects the bug? NIC here never showed any sort of corruption
described in commit which banned 64-bit DMA.

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