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Date: Mon, 5 May 2008 01:15:07 +0400 From: Alexey Dobriyan <adobriyan@...il.com> To: Jay Cliburn <jacliburn@...lsouth.net> Cc: Luca Tettamanti <kronos.it@...il.com>, Chris Snook <csnook@...hat.com>, Jeff Garzik <jeff@...zik.org>, Pekka Enberg <penberg@...helsinki.fi>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Christoph Lameter <clameter@....com>, torvalds@...l.org 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. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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