From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89C64C10F0E for ; Tue, 9 Apr 2019 12:09:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5E84D20880 for ; Tue, 9 Apr 2019 12:09:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727280AbfDIMJ0 (ORCPT ); Tue, 9 Apr 2019 08:09:26 -0400 Received: from relay8-d.mail.gandi.net ([217.70.183.201]:60749 "EHLO relay8-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726388AbfDIMJW (ORCPT ); Tue, 9 Apr 2019 08:09:22 -0400 X-Originating-IP: 109.213.33.177 Received: from localhost (alyon-652-1-42-177.w109-213.abo.wanadoo.fr [109.213.33.177]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay8-d.mail.gandi.net (Postfix) with ESMTPSA id 5550D1BF210; Tue, 9 Apr 2019 12:09:20 +0000 (UTC) From: Alexandre Belloni To: Felipe Balbi , Vladimir Zapolskiy Cc: Greg Kroah-Hartman , Sylvain Lemieux , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandre Belloni Subject: [PATCH 2/5] usb: gadget: udc: lpc32xx: simplify vbus handling Date: Tue, 9 Apr 2019 14:09:05 +0200 Message-Id: <20190409120908.12079-3-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190409120908.12079-1-alexandre.belloni@bootlin.com> References: <20190409120908.12079-1-alexandre.belloni@bootlin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use a threaded IRQ to handle vbus_work instead of using the global worqueue. Signed-off-by: Alexandre Belloni --- drivers/usb/gadget/udc/lpc32xx_udc.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c index 5546cb509085..777279fa4637 100644 --- a/drivers/usb/gadget/udc/lpc32xx_udc.c +++ b/drivers/usb/gadget/udc/lpc32xx_udc.c @@ -152,7 +152,6 @@ struct lpc32xx_udc { /* Work queues related to I2C support */ struct work_struct pullup_job; - struct work_struct vbus_job; struct work_struct power_job; /* USB device peripheral - various */ @@ -2828,11 +2827,9 @@ static irqreturn_t lpc32xx_usb_devdma_irq(int irq, void *_udc) * VBUS detection, pullup handler, and Gadget cable state notification * */ -static void vbus_work(struct work_struct *work) +static void vbus_work(struct lpc32xx_udc *udc) { u8 value; - struct lpc32xx_udc *udc = container_of(work, struct lpc32xx_udc, - vbus_job); if (udc->enabled != 0) { /* Discharge VBUS real quick */ @@ -2877,9 +2874,7 @@ static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc) { struct lpc32xx_udc *udc = _udc; - /* Defer handling of VBUS IRQ to work queue */ - disable_irq_nosync(udc->udp_irq[IRQ_USB_ATX]); - schedule_work(&udc->vbus_job); + vbus_work(udc); return IRQ_HANDLED; } @@ -2908,7 +2903,7 @@ static int lpc32xx_start(struct usb_gadget *gadget, /* Force VBUS process once to check for cable insertion */ udc->last_vbus = udc->vbus = 0; - schedule_work(&udc->vbus_job); + vbus_work(udc); /* Do not re-enable ATX IRQ (3) */ for (i = IRQ_USB_LP; i < IRQ_USB_ATX; i++) @@ -3080,7 +3075,6 @@ static int lpc32xx_udc_probe(struct platform_device *pdev) /* Setup deferred workqueue data */ udc->poweron = udc->pullup = 0; INIT_WORK(&udc->pullup_job, pullup_work); - INIT_WORK(&udc->vbus_job, vbus_work); #ifdef CONFIG_PM INIT_WORK(&udc->power_job, power_work); #endif @@ -3143,8 +3137,9 @@ static int lpc32xx_udc_probe(struct platform_device *pdev) /* The transceiver interrupt is used for VBUS detection and will kick off the VBUS handler function */ - retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_ATX], - lpc32xx_usb_vbus_irq, 0, "udc_otg", udc); + retval = devm_request_threaded_irq(dev, udc->udp_irq[IRQ_USB_ATX], NULL, + lpc32xx_usb_vbus_irq, IRQF_ONESHOT, + "udc_otg", udc); if (retval < 0) { dev_err(udc->dev, "VBUS request irq %d failed\n", udc->udp_irq[IRQ_USB_ATX]); -- 2.20.1