linux-kernel - Re: [PATCH 0/4]: Resolve MSI vs. INTX

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Message-ID: <47202BAB.2040709@garzik.org>
Date:	Thu, 25 Oct 2007 01:37:47 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	David Miller <davem@...emloft.net>
CC:	linux-kernel@...r.kernel.org, barkalow@...ervon.org,
	linas@...tin.ibm.com, chunhao.huang@...mail.com, gregkh@...e.de,
	htejun@...il.com, brice.goglin@...il.com,
	david.gaarenstroom@...il.com, linux-pci@...ey.karlin.mff.cuni.cz,
	shane.huang@....com, linux-ide@...r.kernel.org, brice@...i.com,
	mchan@...adcom.com
Subject: Re: [PATCH 0/4]: Resolve MSI vs. INTX_DISABLE quirks.

David Miller wrote:
> The forthcoming patches are also available from:
> 
> 	kernel.org:/pub/scm/linux/kernel/git/davem/msiquirk-2.6.git
> 
> and clean up the handling of the common quirk wherein setting
> INTX_DISABLE will mistakedly disable MSI generation for some
> devices.
> 
> For devices without that problem, we want to keep the pci_intx() calls
> in drivers/pci/msi.c because those help protect against devices
> with the opposite problem.  Such devices always generate INTX
> interrupts even when MSI is enabled, unless INTX_DISABLE is set.
> 
> Michael, please pay special attention to patch #3.  I think I
> picked the correct PCI device IDs to match for the quirk
> (5714* and 5780*) but it's possible we might need more elaborate
> checks here.  It at least worked properly for the chips in my
> Niagara system.
> 
> In addition to the Tigon3 cases, I added quirk entries for the
> SB700/800 SATA chips and the IXP SB400 USB controllers.
> 
> Signed-off-by: David S. Miller <davem@...emloft.net>

I'm happy with this patch series.  A quirk is better than a 
sledgehammer, and MSI-mode SATA is better than INTX-mode SATA :)

	Jeff



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