From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932856AbcINHqK (ORCPT ); Wed, 14 Sep 2016 03:46:10 -0400 Received: from bear.ext.ti.com ([198.47.19.11]:40949 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761825AbcINHpy (ORCPT ); Wed, 14 Sep 2016 03:45:54 -0400 From: Kishon Vijay Abraham I To: CC: , Subject: [PATCH 50/51] phy-twl4030-usb: better handle musb_mailbox() failure Date: Wed, 14 Sep 2016 13:14:31 +0530 Message-ID: <1473839072-5673-51-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1473839072-5673-1-git-send-email-kishon@ti.com> References: <1473839072-5673-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andreas Kemnade setting twl->linkstat = MUSB_UNKNOWN upon error in musb_mailbox as introduced in commit 12b7db2bf8b8 ("usb: musb: Return error value from musb_mailbox") causes twl4030_usb_irq() to not detect a state change form cable connected to cable disconnected after such an error so that pm_runtime_put_autosuspend() will not be called and the usage counter gets unbalanced. Such errors happen e.g. if the omap2430 module is not (yet) loaded during plug/unplug events. This patch introduces a flag instead that indicates whether there is information for the musb_mailbox pending and calls musb_mailbox() if that flag is set. Signed-off-by: Andreas Kemnade Tested-by: Tony Lindgren Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-twl4030-usb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c index d9b10a3..81067b4 100644 --- a/drivers/phy/phy-twl4030-usb.c +++ b/drivers/phy/phy-twl4030-usb.c @@ -172,6 +172,7 @@ struct twl4030_usb { int irq; enum musb_vbus_id_status linkstat; bool vbus_supplied; + bool musb_mailbox_pending; struct delayed_work id_workaround_work; }; @@ -569,9 +570,12 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl) pm_runtime_mark_last_busy(twl->dev); pm_runtime_put_autosuspend(twl->dev); } + twl->musb_mailbox_pending = true; + } + if (twl->musb_mailbox_pending) { err = musb_mailbox(status); - if (err) - twl->linkstat = MUSB_UNKNOWN; + if (!err) + twl->musb_mailbox_pending = false; } /* don't schedule during sleep - irq works right then */ @@ -676,6 +680,7 @@ static int twl4030_usb_probe(struct platform_device *pdev) twl->irq = platform_get_irq(pdev, 0); twl->vbus_supplied = false; twl->linkstat = MUSB_UNKNOWN; + twl->musb_mailbox_pending = false; twl->phy.dev = twl->dev; twl->phy.label = "twl4030"; -- 1.7.9.5