From: Joerg Roedel <joro@8bytes.org>
To: Mark Hounschell <markh@compro.net>
Cc: "linux-scsi@vger.kernel.org >> SCSI development list"
<linux-scsi@vger.kernel.org>, Hannes Reinecke <hare@suse.de>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: Re: BUG: SCSI aic7xxx driver and AMD IOMMU
Date: Mon, 23 Mar 2015 16:03:04 +0100 [thread overview]
Message-ID: <20150323150304.GQ4441@8bytes.org> (raw)
In-Reply-To: <54F60D33.8090401@compro.net>
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
next prev parent reply other threads:[~2015-03-23 15:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-16 14:34 BUG: SCSI aic7xxx driver and AMD IOMMU Mark Hounschell
[not found] ` <54E1FFFA.1060403-n2QNKt385d+sTnJN9+BGXg@public.gmane.org>
2015-03-03 19:36 ` Mark Hounschell
2015-03-03 19:36 ` Mark Hounschell
2015-03-23 15:03 ` Joerg Roedel [this message]
[not found] ` <20150323150304.GQ4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-24 11:57 ` Mark Hounschell
2015-03-24 11:57 ` Mark Hounschell
2015-03-25 13:59 ` Joerg Roedel
[not found] ` <20150325135937.GR4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-25 15:13 ` Joerg Roedel
2015-03-25 15:13 ` Joerg Roedel
2015-03-25 16:36 ` Mark Hounschell
[not found] ` <5512E412.9040807-n2QNKt385d+sTnJN9+BGXg@public.gmane.org>
2015-03-26 12:45 ` Joerg Roedel
2015-03-26 12:45 ` Joerg Roedel
2015-03-26 14:58 ` Mark Hounschell
2015-03-26 15:52 ` Joerg Roedel
[not found] ` <20150326155248.GW4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-26 17:09 ` Mark Hounschell
2015-03-26 17:09 ` Mark Hounschell
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