Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752667AbcDJTqZ (ORCPT ); Sun, 10 Apr 2016 15:46:25 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:54536 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933024AbcDJTSd (ORCPT ); Sun, 10 Apr 2016 15:18:33 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lukas Wunner , "Rafael J. Wysocki" Subject: [PATCH 4.4 193/210] ACPI / PM: Runtime resume devices when waking from hibernate Date: Sun, 10 Apr 2016 11:36:54 -0700 Message-Id: <20160410183533.478741925@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1394 Lines: 40 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lukas Wunner commit fbda4b38fa3995aa0777fe9cbbdcb223c6292083 upstream. Commit 58a1fbbb2ee8 ("PM / PCI / ACPI: Kick devices that might have been reset by firmware") added a runtime resume for devices that were runtime suspended when the system entered suspend-to-RAM. Briefly, the motivation was to ensure that devices did not remain in a reset-power-on state after resume, potentially preventing deep SoC-wide low-power states from being entered on idle. Currently we're not doing the same when leaving suspend-to-disk and this asymmetry is a problem if drivers rely on the automatic resume triggered by pm_complete_with_resume_check(). Fix it. Fixes: 58a1fbbb2ee8 (PM / PCI / ACPI: Kick devices that might have been reset by firmware) Signed-off-by: Lukas Wunner Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/sleep.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -714,6 +714,7 @@ static int acpi_hibernation_enter(void) static void acpi_hibernation_leave(void) { + pm_set_resume_via_firmware(); /* * If ACPI is not enabled by the BIOS and the boot kernel, we need to * enable it here.