From patchwork Thu May 20 09:20:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 444455 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 3A1CBC433B4 for ; Thu, 20 May 2021 09:57:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1D9A561CAC for ; Thu, 20 May 2021 09:57:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234805AbhETJ6l (ORCPT ); Thu, 20 May 2021 05:58:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:58460 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234613AbhETJ4j (ORCPT ); Thu, 20 May 2021 05:56:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7E83D61405; Thu, 20 May 2021 09:37:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621503465; bh=tVTv+aXED1UpheeDz+k8kU9g/uaMaGmFqE3wfhfqOXw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jk7eLQhQtmUFxfjFprOKHzcDjhrgSmHX56LVhr1unJGTPruieG5/GzMDs0ca3RpoG 8abNj7cFnpLx4n5sBWfuhv1zONwCeihsZRFx3WuIU7EdE3I2UOvutpOcw2XFrfNfq5 K9mtiwqSe4E9H4o3oCCoBEHty98MBDEqF/G+nLd4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Shtylyov , Jens Axboe , Sasha Levin Subject: [PATCH 4.19 234/425] ata: libahci_platform: fix IRQ check Date: Thu, 20 May 2021 11:20:03 +0200 Message-Id: <20210520092139.121732005@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092131.308959589@linuxfoundation.org> References: <20210520092131.308959589@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sergey Shtylyov [ Upstream commit b30d0040f06159de97ad9c0b1536f47250719d7d ] Iff platform_get_irq() returns 0, ahci_platform_init_host() would return 0 early (as if the call was successful). Override IRQ0 with -EINVAL instead as the 'libata' regards 0 as "no IRQ" (thus polling) anyway... Fixes: c034640a32f8 ("ata: libahci: properly propagate return value of platform_get_irq()") Signed-off-by: Sergey Shtylyov Link: https://lore.kernel.org/r/4448c8cc-331f-2915-0e17-38ea34e251c8@omprussia.ru Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/ata/libahci_platform.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c index 522b543f718d..6a55aac0c60f 100644 --- a/drivers/ata/libahci_platform.c +++ b/drivers/ata/libahci_platform.c @@ -544,11 +544,13 @@ int ahci_platform_init_host(struct platform_device *pdev, int i, irq, n_ports, rc; irq = platform_get_irq(pdev, 0); - if (irq <= 0) { + if (irq < 0) { if (irq != -EPROBE_DEFER) dev_err(dev, "no irq\n"); return irq; } + if (!irq) + return -EINVAL; hpriv->irq = irq;