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Date:   Wed, 3 Nov 2021 19:06:10 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     "Deucher, Alexander" <Alexander.Deucher@amd.com>
Cc:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "Zhang, Yifan" <Yifan1.Zhang@amd.com>,
        youling <youling257@gmail.com>, "Zhu, James" <James.Zhu@amd.com>
Subject: Re: [PATCH] drm/amdkfd: fix boot failure when iommu is disabled in
 Picasso.
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References: <20211103145256.1359520-1-alexander.deucher@amd.com>
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On Wed, Nov 03, 2021 at 05:52:37PM +0000, Deucher, Alexander wrote:
> [Public]
> 
> > -----Original Message-----
> > From: Greg KH <gregkh@linuxfoundation.org>
> > Sent: Wednesday, November 3, 2021 1:47 PM
> > To: Deucher, Alexander <Alexander.Deucher@amd.com>
> > Cc: stable@vger.kernel.org; Zhang, Yifan <Yifan1.Zhang@amd.com>; youling
> > <youling257@gmail.com>; Zhu, James <James.Zhu@amd.com>
> > Subject: Re: [PATCH] drm/amdkfd: fix boot failure when iommu is disabled in
> > Picasso.
> > 
> > On Wed, Nov 03, 2021 at 10:52:56AM -0400, Alex Deucher wrote:
> > > From: Yifan Zhang <yifan1.zhang@amd.com>
> > >
> > > When IOMMU disabled in sbios and kfd in iommuv2 path, iommuv2 init
> > > will fail. But this failure should not block amdgpu driver init.
> > >
> > > Bug:
> > >
> > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugz
> > >
> > illa.kernel.org%2Fshow_bug.cgi%3Fid%3D214859&amp;data=04%7C01%7Cal
> > exan
> > >
> > der.deucher%40amd.com%7C995f91a70fdd40d87e4908d99ef1ffb9%7C3dd89
> > 61fe48
> > >
> > 84e608e11a82d994e183d%7C0%7C0%7C637715584500181786%7CUnknown%
> > 7CTWFpbGZ
> > >
> > sb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6M
> > n0%3
> > >
> > D%7C1000&amp;sdata=J9BXIQq57fr%2BfvFHNkrPYps0M7JaFzq4mTh3dMNsk
> > Xw%3D&am
> > > p;reserved=0
> > > Bug:
> > > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitl
> > > ab.freedesktop.org%2Fdrm%2Famd%2F-
> > %2Fissues%2F1770&amp;data=04%7C01%7C
> > >
> > alexander.deucher%40amd.com%7C995f91a70fdd40d87e4908d99ef1ffb9%7
> > C3dd89
> > >
> > 61fe4884e608e11a82d994e183d%7C0%7C0%7C637715584500181786%7CUnkn
> > own%7CT
> > >
> > WFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLC
> > JXVCI
> > >
> > 6Mn0%3D%7C1000&amp;sdata=OTO7kY60xizpZ0uHUn56OcZG0OzzUoytRnv
> > QJfFCABg%3
> > > D&amp;reserved=0
> > > Reported-by: youling <youling257@gmail.com>
> > > Tested-by: youling <youling257@gmail.com>
> > > Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
> > > Reviewed-by: James Zhu <James.Zhu@amd.com>
> > > Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry
> > picked
> > > from commit afd18180c07026f94a80ff024acef5f4159084a4)
> > > Cc: stable@vger.kernel.org # 5.14.x
> > > ---
> > >  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 ----
> > >  drivers/gpu/drm/amd/amdkfd/kfd_device.c    | 3 +++
> > >  2 files changed, 3 insertions(+), 4 deletions(-)
> > 
> > Now queued up, thanks.
> 
> Thanks.  This should go to 5.15.x as well.  I'm not sure if 5.15.x stable is open yet.

It already got added there as well :)

thanks,

greg k-h