Linux IOMMU Development
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From: Mark Hounschell <markh-n2QNKt385d+sTnJN9+BGXg@public.gmane.org>
To: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	Hannes Reinecke <hare-l3A5Bk7waGM@public.gmane.org>,
	"linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org >> SCSI
	development list"
	<linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: BUG: SCSI aic7xxx driver and AMD IOMMU
Date: Tue, 24 Mar 2015 07:57:49 -0400	[thread overview]
Message-ID: <5511513D.6090106@compro.net> (raw)
In-Reply-To: <20150323150304.GQ4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>

On 03/23/2015 11:03 AM, Joerg Roedel wrote:
> 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.
>

I'll be happy to test it.

Regards
Mark

  parent reply	other threads:[~2015-03-24 11:57 UTC|newest]

Thread overview: 11+ 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
2015-03-23 15:03     ` Joerg Roedel
     [not found]       ` <20150323150304.GQ4441-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2015-03-24 11:57         ` Mark Hounschell [this message]
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 16:36                 ` Mark Hounschell
     [not found]                   ` <5512E412.9040807-n2QNKt385d+sTnJN9+BGXg@public.gmane.org>
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

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