From patchwork Tue Dec 1 08:53:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 335871 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, 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 7E031C83019 for ; Tue, 1 Dec 2020 09:06:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E17721D7A for ; Tue, 1 Dec 2020 09:06:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="SRx+bTil" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387651AbgLAJGF (ORCPT ); Tue, 1 Dec 2020 04:06:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:41456 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388511AbgLAJGC (ORCPT ); Tue, 1 Dec 2020 04:06:02 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0F4002224A; Tue, 1 Dec 2020 09:05:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1606813546; bh=z//7JeVCb8EzAnvPDC5wUpe0tLfUjr/1kiZZTgYCeYM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SRx+bTilQbLQvLLlC5cAXcDTOgVphgZdMBnxNx41RxNYfYl5pvqCwRgnv6QuY0drD f4tZsP0prbLud9yyOs80mWvnWGa2UZ/8n8KHat7IE5wo+l2Be4lXt6Ba0798F9Jfas BwbkpqJtbG8I+9EF+smXg5QMSCOznX/GHJvuz+C4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Murphy , Sriram Dash , Pankaj Sharma , Marc Kleine-Budde , Sasha Levin Subject: [PATCH 5.4 76/98] can: m_can: m_can_open(): remove IRQF_TRIGGER_FALLING from request_threaded_irq()s flags Date: Tue, 1 Dec 2020 09:53:53 +0100 Message-Id: <20201201084658.783493642@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201201084652.827177826@linuxfoundation.org> References: <20201201084652.827177826@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marc Kleine-Budde [ Upstream commit 865f5b671b48d0088ce981cff1e822d9f7da441f ] The threaded IRQ handler is used for the tcan4x5x driver only. The IRQ pin of the tcan4x5x controller is active low, so better not use IRQF_TRIGGER_FALLING when requesting the IRQ. As this can result in missing interrupts. Further, if the device tree specified the interrupt as "IRQ_TYPE_LEVEL_LOW", unloading and reloading of the driver results in the following error during ifup: | irq: type mismatch, failed to map hwirq-31 for gpio@20a8000! | tcan4x5x spi1.1: m_can device registered (irq=0, version=32) | tcan4x5x spi1.1 can2: TCAN4X5X successfully initialized. | tcan4x5x spi1.1 can2: failed to request interrupt This patch fixes the problem by removing the IRQF_TRIGGER_FALLING from the request_threaded_irq(). Fixes: f524f829b75a ("can: m_can: Create a m_can platform framework") Cc: Dan Murphy Cc: Sriram Dash Cc: Pankaj Sharma Link: https://lore.kernel.org/r/20201127093548.509253-1-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/m_can/m_can.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 246fa2657d744..eafdb4441d441 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -1605,7 +1605,7 @@ static int m_can_open(struct net_device *dev) INIT_WORK(&cdev->tx_work, m_can_tx_work_queue); err = request_threaded_irq(dev->irq, NULL, m_can_isr, - IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + IRQF_ONESHOT, dev->name, dev); } else { err = request_irq(dev->irq, m_can_isr, IRQF_SHARED, dev->name,