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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 B846EC2D0DA for ; Sun, 29 Dec 2019 18:00:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8DC16206DB for ; Sun, 29 Dec 2019 18:00:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577642449; bh=0T3IJT93N5Anr4WNVXlXzLO8Ah8HVONpz677hD+2zY8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jB6reK0aYZgRMaskP07ArBFZm4jThC+8rk3obPxojPhJKBZm8zS1FNw3M1Sp4kQJQ j0PqPG5byAiRDFzYtKEDAjYVvg61sKhZQZBVllQHCgdMKarJ5n3zEqPGmVajBmL9HS izzAGa2t7cdKZpbf7ZOq4IEK+gCnrREpJB+lDthY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731909AbfL2SAn (ORCPT ); Sun, 29 Dec 2019 13:00:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:47042 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733164AbfL2R47 (ORCPT ); Sun, 29 Dec 2019 12:56:59 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 BD5CB206DB; Sun, 29 Dec 2019 17:56:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577642218; bh=0T3IJT93N5Anr4WNVXlXzLO8Ah8HVONpz677hD+2zY8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BqJWFCp57gUI3mqZucZWTjoRTnBpmD7NmJibiIOK4wPfN9jKLbmwGsWTuqb2VHxkR bJaG4BXfZwoLAYyn7Jzft8abTgzuSR/ICH0o8Vx1oI8rG8X4uXUMczPnHt5IPXYkik XK4Tyvqq+YZMwHdq5d38Np+2lARPKfjeFVGP82BA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe Leroy , Mark Brown Subject: [PATCH 5.4 391/434] spi: fsl: dont map irq during probe Date: Sun, 29 Dec 2019 18:27:24 +0100 Message-Id: <20191229172728.269250404@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229172702.393141737@linuxfoundation.org> References: <20191229172702.393141737@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe Leroy commit 3194d2533efffae8b815d84729ecc58b6a9000ab upstream. With lastest kernel, the following warning is observed at startup: [ 1.500609] ------------[ cut here ]------------ [ 1.505225] remove_proc_entry: removing non-empty directory 'irq/22', leaking at least 'fsl_spi' [ 1.514234] WARNING: CPU: 0 PID: 1 at fs/proc/generic.c:682 remove_proc_entry+0x198/0x1c0 [ 1.522403] CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.0-s3k-dev-02248-g93532430a4ff #2564 [ 1.530724] NIP: c0197694 LR: c0197694 CTR: c0050d80 [ 1.535762] REGS: df4a5af0 TRAP: 0700 Not tainted (5.4.0-02248-g93532430a4ff) [ 1.543818] MSR: 00029032 CR: 22028222 XER: 00000000 [ 1.550524] [ 1.550524] GPR00: c0197694 df4a5ba8 df4a0000 00000054 00000000 00000000 00004a38 00000010 [ 1.550524] GPR08: c07c5a30 00000800 00000000 00001032 22000208 00000000 c0004b14 00000000 [ 1.550524] GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c0830000 c07fc078 [ 1.550524] GPR24: c08e8ca0 df665d10 df60ea98 c07c9db8 00000001 df5d5ae3 df5d5a80 df43f8e3 [ 1.585327] NIP [c0197694] remove_proc_entry+0x198/0x1c0 [ 1.590628] LR [c0197694] remove_proc_entry+0x198/0x1c0 [ 1.595829] Call Trace: [ 1.598280] [df4a5ba8] [c0197694] remove_proc_entry+0x198/0x1c0 (unreliable) [ 1.605321] [df4a5bd8] [c0067acc] unregister_irq_proc+0x5c/0x70 [ 1.611238] [df4a5bf8] [c005fbc4] free_desc+0x3c/0x80 [ 1.616286] [df4a5c18] [c005fe2c] irq_free_descs+0x70/0xa8 [ 1.621778] [df4a5c38] [c033d3fc] of_fsl_spi_probe+0xdc/0x3cc [ 1.627525] [df4a5c88] [c02f0f64] platform_drv_probe+0x44/0xa4 [ 1.633350] [df4a5c98] [c02eee44] really_probe+0x1ac/0x418 [ 1.638829] [df4a5cc8] [c02ed3e8] bus_for_each_drv+0x64/0xb0 [ 1.644481] [df4a5cf8] [c02ef950] __device_attach+0xd4/0x128 [ 1.650132] [df4a5d28] [c02ed61c] bus_probe_device+0xa0/0xbc [ 1.655783] [df4a5d48] [c02ebbe8] device_add+0x544/0x74c [ 1.661096] [df4a5d88] [c0382b78] of_platform_device_create_pdata+0xa4/0x100 [ 1.668131] [df4a5da8] [c0382cf4] of_platform_bus_create+0x120/0x20c [ 1.674474] [df4a5df8] [c0382d50] of_platform_bus_create+0x17c/0x20c [ 1.680818] [df4a5e48] [c0382e88] of_platform_bus_probe+0x9c/0xf0 [ 1.686907] [df4a5e68] [c0751404] __machine_initcall_cmpcpro_cmpcpro_declare_of_platform_devices+0x74/0x1a4 [ 1.696629] [df4a5e98] [c072a4cc] do_one_initcall+0x8c/0x1d4 [ 1.702282] [df4a5ef8] [c072a768] kernel_init_freeable+0x154/0x204 [ 1.708455] [df4a5f28] [c0004b2c] kernel_init+0x18/0x110 [ 1.713769] [df4a5f38] [c00122ac] ret_from_kernel_thread+0x14/0x1c [ 1.719926] Instruction dump: [ 1.722889] 2c030000 4182004c 3863ffb0 3c80c05f 80e3005c 388436a0 3c60c06d 7fa6eb78 [ 1.730630] 7fe5fb78 38840280 38634178 4be8c611 <0fe00000> 4bffff6c 3c60c071 7fe4fb78 [ 1.738556] ---[ end trace 05d0720bf2e352e2 ]--- The problem comes from the error path which calls irq_dispose_mapping() while the IRQ has been requested with devm_request_irq(). IRQ doesn't need to be mapped with irq_of_parse_and_map(). The only need is to get the IRQ virtual number. For that, use of_irq_to_resource() instead of the irq_of_parse_and_map()/irq_dispose_mapping() pair. Fixes: 500a32abaf81 ("spi: fsl: Call irq_dispose_mapping in err path") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy Link: https://lore.kernel.org/r/518cfb83347d5372748e7fe72f94e2e9443d0d4a.1575905123.git.christophe.leroy@c-s.fr Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-fsl-spi.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -736,8 +736,8 @@ static int of_fsl_spi_probe(struct platf if (ret) goto err; - irq = irq_of_parse_and_map(np, 0); - if (!irq) { + irq = of_irq_to_resource(np, 0, NULL); + if (irq <= 0) { ret = -EINVAL; goto err; } @@ -751,7 +751,6 @@ static int of_fsl_spi_probe(struct platf return 0; err: - irq_dispose_mapping(irq); return ret; }