From: Joerg Roedel <joro@8bytes.org>
To: Borislav Petkov <bp@alien8.de>
Cc: lkml <linux-kernel@vger.kernel.org>,
"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
"Christian König" <christian.koenig@amd.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Jiang Liu" <jiang.liu@linux.intel.com>
Subject: Re: WARNING: CPU: 4 PID: 863 at include/drm/drm_crtc.h:1577 drm_helper_choose_encoder_dpms+0x88/0x90() - evildoer found and neutralized
Date: Wed, 30 Sep 2015 20:07:27 +0200 [thread overview]
Message-ID: <20150930180727.GW3036@8bytes.org> (raw)
In-Reply-To: <20150930173619.GA3826@pd.tnic>
On Wed, Sep 30, 2015 at 07:36:19PM +0200, Borislav Petkov wrote:
> Right, so this fixes the issue on my box, courtesy of Joerg. WE
> basically don't disable the IRQ on MSI-enabled devices. The AMD IOMMU
> uses a barebones PCI device but not a PCI driver, which would be an
> overkill.
Well, not only overkill, but actually harmful. As I just wrote to
Jiang, a device can be forcibly unbound from its driver, which is
something we don't want for the IOMMU.
Joerg
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Borislav Petkov <bp@alien8.de>
Cc: "Jiang Liu" <jiang.liu@linux.intel.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Alex Deucher" <alexdeucher@gmail.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: WARNING: CPU: 4 PID: 863 at include/drm/drm_crtc.h:1577 drm_helper_choose_encoder_dpms+0x88/0x90() - evildoer found and neutralized
Date: Wed, 30 Sep 2015 20:07:27 +0200 [thread overview]
Message-ID: <20150930180727.GW3036@8bytes.org> (raw)
In-Reply-To: <20150930173619.GA3826@pd.tnic>
On Wed, Sep 30, 2015 at 07:36:19PM +0200, Borislav Petkov wrote:
> Right, so this fixes the issue on my box, courtesy of Joerg. WE
> basically don't disable the IRQ on MSI-enabled devices. The AMD IOMMU
> uses a barebones PCI device but not a PCI driver, which would be an
> overkill.
Well, not only overkill, but actually harmful. As I just wrote to
Jiang, a device can be forcibly unbound from its driver, which is
something we don't want for the IOMMU.
Joerg
next prev parent reply other threads:[~2015-09-30 18:07 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-21 13:31 WARNING: CPU: 4 PID: 863 at include/drm/drm_crtc.h:1577 drm_helper_choose_encoder_dpms+0x88/0x90() Borislav Petkov
2015-09-22 19:06 ` Borislav Petkov
2015-09-22 19:06 ` Borislav Petkov
2015-09-22 19:58 ` Alex Deucher
2015-09-22 19:58 ` Alex Deucher
2015-09-22 20:21 ` Borislav Petkov
2015-09-22 20:21 ` Borislav Petkov
2015-09-22 20:54 ` Alex Deucher
2015-09-22 20:54 ` Alex Deucher
2015-09-23 7:25 ` Daniel Vetter
2015-09-23 8:59 ` Borislav Petkov
2015-09-23 8:59 ` Borislav Petkov
2015-09-23 14:44 ` Daniel Vetter
2015-09-23 14:44 ` Daniel Vetter
2015-09-23 16:06 ` Borislav Petkov
2015-09-23 16:06 ` Borislav Petkov
2015-09-23 16:18 ` Borislav Petkov
2015-09-23 16:18 ` Borislav Petkov
2015-09-26 16:46 ` WARNING: CPU: 4 PID: 863 at include/drm/drm_crtc.h:1577 drm_helper_choose_encoder_dpms+0x88/0x90() - evildoer found and neutralized Borislav Petkov
2015-09-26 16:46 ` Borislav Petkov
2015-09-29 8:50 ` Jiang Liu
2015-09-29 10:51 ` Borislav Petkov
2015-09-29 10:51 ` Borislav Petkov
2015-09-30 7:45 ` Jiang Liu
2015-09-30 7:45 ` Jiang Liu
2015-09-30 12:44 ` Joerg Roedel
2015-09-30 17:00 ` Jiang Liu
2015-09-30 17:36 ` Borislav Petkov
2015-09-30 17:36 ` Borislav Petkov
2015-09-30 18:07 ` Joerg Roedel [this message]
2015-09-30 18:07 ` Joerg Roedel
2015-10-03 7:36 ` Jiang Liu
2015-10-03 7:36 ` Jiang Liu
2015-10-03 9:35 ` Borislav Petkov
2015-10-03 9:35 ` Borislav Petkov
2015-10-05 10:03 ` Joerg Roedel
2015-10-05 10:03 ` Joerg Roedel
2015-10-06 13:13 ` Jiang Liu
2015-10-09 10:24 ` Joerg Roedel
2015-10-09 10:24 ` Joerg Roedel
2015-09-30 18:06 ` Joerg Roedel
2015-09-30 18:06 ` Joerg Roedel
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