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=-19.4 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=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 5D5BFC43462 for ; Wed, 12 May 2021 15:07:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 299136198A for ; Wed, 12 May 2021 15:07:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233270AbhELPIJ (ORCPT ); Wed, 12 May 2021 11:08:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:56088 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232618AbhELPDd (ORCPT ); Wed, 12 May 2021 11:03:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 40DFE61925; Wed, 12 May 2021 14:58:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620831517; bh=/AgjfOrT7Mt9DjHDE0Dodd0FDUd6F7i8uh2P6FQQHrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XGDEjpXB7lzQdqrm5KEXc0KpzMab7xi+bpxUvK4CCYRYmsRyoj0VW9GDK83z5YP96 3m0oo2ejm22sSEIoId9RMcxDW4nJAJ5AWLJtH4tGNjqPh18VsiK90CoN9eJPKgyqA7 eIuqoOiNAZ6WW1fBTx8EmXh5m/NWYufcgDYOevCA= 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 5.4 150/244] ata: libahci_platform: fix IRQ check Date: Wed, 12 May 2021 16:48:41 +0200 Message-Id: <20210512144747.813412380@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144743.039977287@linuxfoundation.org> References: <20210512144743.039977287@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 a1cbb894e5f0..416cfbf2f1c2 100644 --- a/drivers/ata/libahci_platform.c +++ b/drivers/ata/libahci_platform.c @@ -582,11 +582,13 @@ 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; -- 2.30.2