From patchwork Fri Nov 26 02:03:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baokun Li X-Patchwork-Id: 1559925 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-ide-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4J0d7571jsz9t54 for ; Fri, 26 Nov 2021 12:53:05 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357547AbhKZB4P (ORCPT ); Thu, 25 Nov 2021 20:56:15 -0500 Received: from szxga01-in.huawei.com ([45.249.212.187]:14983 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357475AbhKZByL (ORCPT ); Thu, 25 Nov 2021 20:54:11 -0500 Received: from dggpeml500020.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4J0d1g0cW0zZdJ9; Fri, 26 Nov 2021 09:48:23 +0800 (CST) Received: from huawei.com (10.175.127.227) by dggpeml500020.china.huawei.com (7.185.36.88) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.20; Fri, 26 Nov 2021 09:50:57 +0800 From: Baokun Li To: , , , , CC: , , , , , Hulk Robot Subject: [PATCH -next V5 2/2] sata_fsl: fix warning in remove_proc_entry when rmmod sata_fsl Date: Fri, 26 Nov 2021 10:03:07 +0800 Message-ID: <20211126020307.2168767-3-libaokun1@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211126020307.2168767-1-libaokun1@huawei.com> References: <20211126020307.2168767-1-libaokun1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpeml500020.china.huawei.com (7.185.36.88) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-ide@vger.kernel.org Trying to remove the fsl-sata module in the PPC64 GNU/Linux leads to the following warning: ------------[ cut here ]------------ remove_proc_entry: removing non-empty directory 'irq/69', leaking at least 'fsl-sata[ff0221000.sata]' WARNING: CPU: 3 PID: 1048 at fs/proc/generic.c:722 .remove_proc_entry+0x20c/0x220 IRQMASK: 0 NIP [c00000000033826c] .remove_proc_entry+0x20c/0x220 LR [c000000000338268] .remove_proc_entry+0x208/0x220 Call Trace: .remove_proc_entry+0x208/0x220 (unreliable) .unregister_irq_proc+0x104/0x140 .free_desc+0x44/0xb0 .irq_free_descs+0x9c/0xf0 .irq_dispose_mapping+0x64/0xa0 .sata_fsl_remove+0x58/0xa0 [sata_fsl] .platform_drv_remove+0x40/0x90 .device_release_driver_internal+0x160/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] ---[ end trace 0ea876d4076908f5 ]--- The driver creates the mapping by calling irq_of_parse_and_map(), so it also has to dispose the mapping. But the easy way out is to simply use platform_get_irq() instead of irq_of_parse_map(). Also we should adapt return value checking and propagate error values. In this case the mapping is not managed by the device but by the of core, so the device has not to dispose the mapping. Fixes: faf0b2e5afe7 ("drivers/ata: add support to Freescale 3.0Gbps SATA Controller") Cc: stable@vger.kernel.org Reported-by: Hulk Robot Signed-off-by: Baokun Li Reviewed-by: Sergei Shtylyov --- V1->V2: Adapt return value checking and propagate error values. V2->V3: Add fixed and CC stable. V4->V5: Delete duplicate dev_err() message. drivers/ata/sata_fsl.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c index 2eb216792695..3b31a4f596d8 100644 --- a/drivers/ata/sata_fsl.c +++ b/drivers/ata/sata_fsl.c @@ -1490,9 +1490,9 @@ static int sata_fsl_probe(struct platform_device *ofdev) host_priv->ssr_base = ssr_base; host_priv->csr_base = csr_base; - irq = irq_of_parse_and_map(ofdev->dev.of_node, 0); - if (!irq) { - dev_err(&ofdev->dev, "invalid irq from platform\n"); + irq = platform_get_irq(ofdev, 0); + if (irq < 0) { + retval = irq; goto error_exit_with_cleanup; } host_priv->irq = irq; @@ -1567,8 +1567,6 @@ static int sata_fsl_remove(struct platform_device *ofdev) ata_host_detach(host); - irq_dispose_mapping(host_priv->irq); - return 0; }