From patchwork Wed May 12 14:50:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 436263 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=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 F32B3C2B9F6 for ; Wed, 12 May 2021 17:05:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6EED613CB for ; Wed, 12 May 2021 17:05:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344985AbhELRFf (ORCPT ); Wed, 12 May 2021 13:05:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:35700 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244431AbhELQqD (ORCPT ); Wed, 12 May 2021 12:46:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id ADCAC61E73; Wed, 12 May 2021 16:14:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620836084; bh=Wyw02pBlIowNMubUOAZqGkILU+OwdGRv5Z4R6g5S45c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DmW05bqLXyWgw4TQQLRF4a+LlLegq6lc3XCxKD9aUOliBhzRkN0OC2CckPl2YqI5c +d6GzS5euf6coBKADozr/Ab+dNp0D6oAcMPGhwSr0bOnqqKiywL9FC1fMX2Y4dopom eRNwtJhWLBayJDL4LdKKM9H8Hh1+WogAsv5tsL/Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Shtylyov , Geert Uytterhoeven , Wolfram Sang , Sasha Levin Subject: [PATCH 5.12 568/677] i2c: rcar: add IRQ check Date: Wed, 12 May 2021 16:50:14 +0200 Message-Id: <20210512144856.271716197@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@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 147178cf03a6dcb337e703d4dacd008683022a58 ] The driver neglects to check the result of platform_get_irq()'s call and blithely passes the negative error codes to devm_request_irq() (which takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding an original error code. Stop calling devm_request_irq() with the invalid IRQ #s. Fixes: 6ccbe607132b ("i2c: add Renesas R-Car I2C driver") Signed-off-by: Sergey Shtylyov Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-rcar.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 12f6d452c0f7..8722ca23f889 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -1027,7 +1027,10 @@ static int rcar_i2c_probe(struct platform_device *pdev) if (of_property_read_bool(dev->of_node, "smbus")) priv->flags |= ID_P_HOST_NOTIFY; - priv->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + goto out_pm_disable; + priv->irq = ret; ret = devm_request_irq(dev, priv->irq, irqhandler, irqflags, dev_name(dev), priv); if (ret < 0) { dev_err(dev, "cannot get irq %d\n", priv->irq);