From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47220 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752673AbcKIISr (ORCPT ); Wed, 9 Nov 2016 03:18:47 -0500 Subject: Patch "drm/nouveau/acpi: fix check for power resources support" has been added to the 4.8-stable tree To: peter@lekensteyn.nl, airlied@redhat.com, gregkh@linuxfoundation.org, mika.westerberg@linux.intel.com, rick.2889@gmail.com Cc: , From: Date: Wed, 09 Nov 2016 09:18:39 +0100 Message-ID: <147867951913106@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drm/nouveau/acpi: fix check for power resources support to the 4.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-nouveau-acpi-fix-check-for-power-resources-support.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b0a6af8b34c9ad20894aa46f85f4bf59d444f286 Mon Sep 17 00:00:00 2001 From: Peter Wu Date: Mon, 31 Oct 2016 23:48:22 +0100 Subject: drm/nouveau/acpi: fix check for power resources support From: Peter Wu commit b0a6af8b34c9ad20894aa46f85f4bf59d444f286 upstream. Check whether the kernel really supports power resources for a device, otherwise the power might not be removed when the device is runtime suspended (DSM should still work in these cases where PR does not). This is a workaround for a problem where ACPICA and Windows 10 differ in behavior. ACPICA does not correctly enumerate power resources within a conditional block (due to delayed execution of such blocks) and as a result power_resources is set to false even if _PR3 exists. Fixes: 692a17dcc292 ("drm/nouveau/acpi: fix lockup with PCIe runtime PM") Link: https://bugs.freedesktop.org/show_bug.cgi?id=98398 Reported-and-tested-by: Rick Kerkhof Reviewed-by: Mika Westerberg Signed-off-by: Peter Wu Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/nouveau/nouveau_acpi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -240,7 +240,8 @@ static bool nouveau_pr3_present(struct p if (!parent_adev) return false; - return acpi_has_method(parent_adev->handle, "_PR3"); + return parent_adev->power.flags.power_resources && + acpi_has_method(parent_adev->handle, "_PR3"); } static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out, Patches currently in stable-queue which might be from peter@lekensteyn.nl are queue-4.8/drm-nouveau-acpi-fix-check-for-power-resources-support.patch