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Date: Tue, 6 Oct 2015 21:13:11 +0800 From: Jiang Liu <jiang.liu@...ux.intel.com> To: Joerg Roedel <joro@...tes.org> Cc: Borislav Petkov <bp@...en8.de>, Daniel Vetter <daniel@...ll.ch>, Thomas Gleixner <tglx@...utronix.de>, Bjorn Helgaas <bhelgaas@...gle.com>, Alex Deucher <alexdeucher@...il.com>, Alex Deucher <alexander.deucher@....com>, Christian König <christian.koenig@....com>, Maling list - DRI developers <dri-devel@...ts.freedesktop.org>, lkml <linux-kernel@...r.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 On 2015/10/5 18:03, Joerg Roedel wrote: > 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? Hi Joerg, We are on leave for Chinese National Holiday and has limited access to my working environment. It would be appreciated if you could help to send out a patch for it. Otherwise I will send out a patch within 2-3 days. Thanks! Gerry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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