From: Joerg Roedel <joro@8bytes.org>
To: Jiang Liu <jiang.liu@linux.intel.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
"Borislav Petkov" <bp@alien8.de>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Christian König" <christian.koenig@amd.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: Mon, 5 Oct 2015 12:03:55 +0200 [thread overview]
Message-ID: <20151005100354.GB12506@8bytes.org> (raw)
In-Reply-To: <560F8583.2010403@linux.intel.com>
Hi Jiang,
On Sat, Oct 03, 2015 at 03:36:35PM +0800, Jiang Liu wrote:
> So to summary, I think we only need following change to fix the
> regression:
> int pcibios_alloc_irq(struct pci_dev *dev)
> {
> + if (pci_dev_msi_enabled(dev))
> + return -EBUSY;
>
> What do you think?
Yes, that works too and has the added benefit that no driver can attach
to the iommu device and get in the way of the driver.
Will you send the patch for this change or should I do it?
Joerg
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Jiang Liu <jiang.liu@linux.intel.com>
Cc: "Borislav Petkov" <bp@alien8.de>,
"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: Mon, 5 Oct 2015 12:03:55 +0200 [thread overview]
Message-ID: <20151005100354.GB12506@8bytes.org> (raw)
In-Reply-To: <560F8583.2010403@linux.intel.com>
Hi Jiang,
On Sat, Oct 03, 2015 at 03:36:35PM +0800, Jiang Liu wrote:
> So to summary, I think we only need following change to fix the
> regression:
> int pcibios_alloc_irq(struct pci_dev *dev)
> {
> + if (pci_dev_msi_enabled(dev))
> + return -EBUSY;
>
> What do you think?
Yes, that works too and has the added benefit that no driver can attach
to the iommu device and get in the way of the driver.
Will you send the patch for this change or should I do it?
Joerg
next prev parent reply other threads:[~2015-10-05 10:03 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
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 [this message]
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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