From patchwork Thu May 20 09:20:54 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: 445693 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 C0C11C433ED for ; Thu, 20 May 2021 10:04:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A4CA66192A for ; Thu, 20 May 2021 10:04:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231933AbhETKFf (ORCPT ); Thu, 20 May 2021 06:05:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:37280 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235065AbhETKB4 (ORCPT ); Thu, 20 May 2021 06:01:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5523B61919; Thu, 20 May 2021 09:39:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621503581; bh=NMND5a38PnJybIJdhXNWIZnm42fz3uJk8mx8+O0DYK0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LTyZc+uQYqLvKGlg1PMY2LHlt1csOW3B/Jw+gBulQzN9KYqxG5r85e6R40pq7EKxX AnjGnUZG0lDCLB2VYv4M9tHR5RMkRPD3f8FLmsEfmJRSkVc0k39E55dFqLKFPnWkHU nJtaX0/4H0cu/VLLi2/Jucqq4tE5mgtU3HQFqyEM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 285/425] bnxt_en: fix ternary sign extension bug in bnxt_show_temp() Date: Thu, 20 May 2021 11:20:54 +0200 Message-Id: <20210520092140.812412584@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: Dan Carpenter [ Upstream commit 27537929f30d3136a71ef29db56127a33c92dad7 ] The problem is that bnxt_show_temp() returns long but "rc" is an int and "len" is a u32. With ternary operations the type promotion is quite tricky. The negative "rc" is first promoted to u32 and then to long so it ends up being a high positive value instead of a a negative as we intended. Fix this by removing the ternary. Fixes: d69753fa1ecb ("bnxt_en: return proper error codes in bnxt_show_temp") Signed-off-by: Dan Carpenter Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 44ed2f6e2d96..6033970fb667 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -6851,7 +6851,9 @@ static ssize_t bnxt_show_temp(struct device *dev, if (!rc) len = sprintf(buf, "%u\n", resp->temp * 1000); /* display millidegree */ mutex_unlock(&bp->hwrm_cmd_lock); - return rc ?: len; + if (rc) + return rc; + return len; } static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);