Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757822AbaJIVjh (ORCPT ); Thu, 9 Oct 2014 17:39:37 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:59169 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757350AbaJIVIJ (ORCPT ); Thu, 9 Oct 2014 17:08:09 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Felipe Balbi , Kamal Mostafa Subject: [PATCH 3.13 027/163] usb: dwc3: core: fix order of PM runtime calls Date: Thu, 9 Oct 2014 14:00:52 -0700 Message-Id: <1412888588-26755-28-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412888588-26755-1-git-send-email-kamal@canonical.com> References: <1412888588-26755-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.9 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi 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(-) 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/