[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20150323150304.GQ4441@8bytes.org>
Date: Mon, 23 Mar 2015 16:03:04 +0100
From: Joerg Roedel <joro@...tes.org>
To: Mark Hounschell <markh@...pro.net>
Cc: "linux-scsi@...r.kernel.org >> SCSI development list"
<linux-scsi@...r.kernel.org>, Hannes Reinecke <hare@...e.de>,
linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org
Subject: Re: BUG: SCSI aic7xxx driver and AMD IOMMU
Hi Mark,
On Tue, Mar 03, 2015 at 02:36:19PM -0500, Mark Hounschell wrote:
> It looks like this problem is NOT a bug with the SCSI aic7xxx driver
> after all. I can duplicate this BUG very easily with other hardware.
> Simply removing a driver module (whether it its self, has actually
> used any of the DMA API or not) that is sitting on the same pci bus
> as a card that is actually using DMA will cause this. And that card
> that is in use and using DMA will no longer function. It "looks and
> feels" like unloading a module causes the IOMMU to improperly unmap
> valid mappings.
You are right, I looked into the code and found the problem. I'll post a
fix for testing this week.
Joerg
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists