From patchwork Wed Oct 8 22:14:03 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 397881 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 2466D140082; Thu, 9 Oct 2014 09:17:50 +1100 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1XbzYJ-0001Gb-El; Wed, 08 Oct 2014 22:17:47 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1XbzUj-0007fR-Sn for kernel-team@lists.ubuntu.com; Wed, 08 Oct 2014 22:14:05 +0000 Received: from c-76-102-4-12.hsd1.ca.comcast.net ([76.102.4.12] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1XbzUj-0005n7-MG; Wed, 08 Oct 2014 22:14:05 +0000 Received: from kamal by fourier with local (Exim 4.82) (envelope-from ) id 1XbzUh-0007sb-UE; Wed, 08 Oct 2014 15:14:03 -0700 From: Kamal Mostafa To: Felipe Balbi Subject: [3.13.y.z extended stable] Patch "usb: dwc3: core: fix order of PM runtime calls" has been added to staging queue Date: Wed, 8 Oct 2014 15:14:03 -0700 Message-Id: <1412806443-30258-1-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 X-Extended-Stable: 3.13 Cc: Kamal Mostafa , kernel-team@lists.ubuntu.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled usb: dwc3: core: fix order of PM runtime calls to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue This patch is scheduled to be released in version 3.13.11.9. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.13.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From f8e3c38249612b74e8daa5faaebd3210a5c6d6b8 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 2 Sep 2014 14:57:20 -0500 Subject: usb: dwc3: core: fix order of PM runtime calls commit fed33afce0eda44a46ae24d93aec1b5198c0bac4 upstream. Currently, we disable pm_runtime before all register accesses are done, this is dangerous and might lead to abort exceptions due to the driver trying to access a register which is clocked by a clock which was long gated. Fix that by moving pm_runtime_put_sync() and pm_runtime_disable() as the last thing we do before returning from our ->remove() method. Fixes: 72246da (usb: Introduce DesignWare USB3 DRD Driver) Signed-off-by: Felipe Balbi Signed-off-by: Kamal Mostafa --- drivers/usb/dwc3/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) -- 1.9.1 diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index a49217a..8c9c4cf 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -586,9 +586,6 @@ static int dwc3_remove(struct platform_device *pdev) usb_phy_set_suspend(dwc->usb2_phy, 1); usb_phy_set_suspend(dwc->usb3_phy, 1); - pm_runtime_put_sync(&pdev->dev); - pm_runtime_disable(&pdev->dev); - dwc3_debugfs_exit(dwc); switch (dwc->dr_mode) { @@ -611,6 +608,9 @@ static int dwc3_remove(struct platform_device *pdev) dwc3_free_event_buffers(dwc); dwc3_core_exit(dwc); + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); + return 0; }