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Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40 BUG: unable to handle kernel NULL pointer dereference at 0000000000000198

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From: Joerg Roedel
Subject: Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40 BUG: unable to handle kernel NULL pointer dereference at 0000000000000198
Date: Tuesday, August 10, 2010 - 1:47 pm

Hi Sander,

On Tue, Aug 10, 2010 at 10:36:35PM +0200, Sander Eikelenboom wrote:

The devices should be attached to this controler:

0a:01.0 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev 43) (prog-if 10 [OHCI])
0a:01.1 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev 43) (prog-if 10 [OHCI])
0a:01.2 USB Controller [0c03]: NEC Corporation USB 2.0 [1033:00e0] (rev 04) (prog-if 20 [EHCI])

The PCI devices associated with that controler alias to 0a:00.0 which
does not exist in your system (hence the crash). And the fact that these
devices have an alias makes me believe that the BIOS detects them as
legacy PCI devices. PCI-e does typically not has aliases. Can you send
lcpi -t output to see to which upstream bridge these devices are
connected to?

	Joerg

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Messages in current thread:
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 9:57 am)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 11:01 am)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 11:05 am)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 1:28 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 1:36 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 1:47 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 1:57 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 2:25 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 2:36 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Tue Aug 10, 2:48 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 3:02 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Joerg Roedel, (Tue Aug 10, 3:24 pm)
Re: [2.6.35] AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x ..., Sander Eikelenboom, (Wed Aug 11, 10:54 am)