From patchwork Wed Mar 31 07:21:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 12174507 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 2A3E9C433DB for ; Wed, 31 Mar 2021 07:22:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 057E2619DA for ; Wed, 31 Mar 2021 07:22:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233996AbhCaHVc (ORCPT ); Wed, 31 Mar 2021 03:21:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:40380 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233843AbhCaHVZ (ORCPT ); Wed, 31 Mar 2021 03:21:25 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4248D619D3; Wed, 31 Mar 2021 07:21:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617175284; bh=BTW66Z06dN1EnDtCDk+B5PVhTFQ03DeugVVi33Kyn6g=; h=From:To:Cc:Subject:Date:From; b=cRlXjrD+sBhiggkelJca4Yru5SmIA2dMAaYw4G/zGGCKOuHN/CGuAYRP/vakrl8bl Pyu4U9EBSVsez7n4/Bf41cAlYGsb4QL5TWNJShnfDP8QHQfN7AFetC7KNCiEUAJVa7 YJOJNmSXWk0j1b6sKA7BFeBi9IfLi/utPcn3pPMA1RtmGHcQ6ahMRFVrCKAE1bXQpy OQgbcHlRqzs/ro7eCohXmxGvyndkcx4gn4CQb0hNUjxkKWaL6hOKmRvIm1D2yMQ73Z 9q3ZCXt6/8950v9Pd02qBX1qv//NhssFRibhpH2CU84z2979AMjzRuLrc2IBoqHvS9 5CQeIYuLtt7SA== From: Vinod Koul To: Srinivas Kandagatla Cc: Vinod Koul , Bjorn Andersson , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, kernel test robot Subject: [PATCH] soundwire: qcom: use signed variable for error return Date: Wed, 31 Mar 2021 12:51:11 +0530 Message-Id: <20210331072111.2945945-1-vkoul@kernel.org> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org We get warning for using a unsigned variable being compared to less than zero. The comparison is correct as it checks for errors from previous call to qcom_swrm_get_alert_slave_dev_num(), so we should use a signed variable instead. drivers/soundwire/qcom.c: qcom_swrm_irq_handler() warn: impossible condition '(devnum < 0) => (0-255 < 0)' Reported-by: kernel test robot Signed-off-by: Vinod Koul --- drivers/soundwire/qcom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index b08ecb9b418c..55ed133c6704 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -428,7 +428,7 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id) struct qcom_swrm_ctrl *swrm = dev_id; u32 value, intr_sts, intr_sts_masked, slave_status; u32 i; - u8 devnum = 0; + s8 devnum = 0; int ret = IRQ_HANDLED; swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);