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Date: Sun, 6 Feb 2011 23:41:19 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Matthew Garrett <mjg59@...f.ucam.org> Cc: akpm@...ux-foundation.org, intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, rpurdie@...ys.net Subject: Re: [PATCH 5/5] ACPI: Tie ACPI backlight devices to PCI devices if possible On Sunday, February 06, 2011, Matthew Garrett wrote: > On Sun, Feb 06, 2011 at 09:35:07PM +0100, Rafael J. Wysocki wrote: > > > + acpi_get_parent(device->dev->handle, &acpi_parent); > > > + > > > + pdev = acpi_get_pci_dev(acpi_parent); > > > + if (pdev) { > > > + parent = &pdev->dev; > > > + pci_dev_put(pdev); > > > + } > > > > I'm afraid you can't do that or suspend problems will happen. > > Ugh. Ok, how can we fix this? Not nicely, I'm afraid. One possible way is to use device_pm_move_after() to rearrange the devices in the PM core's suspend list, but that will happen in the video device being suspended before the new parent (and resumed after it) -- of course, the only option is to move the ACPI video device after the new parent. Thanks, Rafael -- 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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