From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E48036F for ; Sat, 18 Feb 2023 00:40:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1676680835; x=1708216835; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=9UeQUR+hYc76x7YfmfwMiEJR1+Ro6FeZ9RipZ0udPiY=; b=fS1TIF0A/PlBP+FHEewEV09gmQSM0qbREFQa/NJ6afCIvnweFfTtrVHb NWVZUONrp9iyld4I6v6JYB9MsA1jhes2cKPNNvi8TLGELGwE5CdlyWbNp e6j0V1OlC6EPnv1fPYTn0jpFI+W4b3F3EIME1icudlGhQCZLrot8guTs0 Gw3dSjdJ19NekdRI9aCGBF9K8/UTzgKiX+k3ejYdgBq6/Y3WSGDAXYnFs wapKSEgPyoficG3KZMGhNd6U6dGwZWX6JzJEfknm162gTyPos/X9VafZL 20uLoT+znAW51lQBIADVqBFo9c/JYQCozk3+RNpbewgyryQejsBoBGnxV A==; X-IronPort-AV: E=McAfee;i="6500,9779,10624"; a="311754225" X-IronPort-AV: E=Sophos;i="5.97,306,1669104000"; d="scan'208";a="311754225" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2023 16:40:32 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10624"; a="844749005" X-IronPort-AV: E=Sophos;i="5.97,306,1669104000"; d="scan'208";a="844749005" Received: from basavana-mobl.amr.corp.intel.com (HELO vverma7-desk1.local) ([10.209.2.127]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2023 16:40:32 -0800 From: Vishal Verma Date: Fri, 17 Feb 2023 17:40:23 -0700 Subject: [PATCH ndctl 2/3] cxl/monitor: retain error code in monitor_event() Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20230217-coverity-fixes-v1-2-043fac896a40@intel.com> References: <20230217-coverity-fixes-v1-0-043fac896a40@intel.com> In-Reply-To: <20230217-coverity-fixes-v1-0-043fac896a40@intel.com> To: linux-cxl@vger.kernel.org Cc: nvdimm@lists.linux.dev, Dave Jiang , Dan Williams , Vishal Verma X-Mailer: b4 0.13-dev-ada30 X-Developer-Signature: v=1; a=openpgp-sha256; l=1113; i=vishal.l.verma@intel.com; h=from:subject:message-id; bh=9UeQUR+hYc76x7YfmfwMiEJR1+Ro6FeZ9RipZ0udPiY=; b=owGbwMvMwCXGf25diOft7jLG02pJDMkf5Oq7Dz7oPdK202man3ff7srrsX2e1t6rzix8utVA3 9vz82r9jlIWBjEuBlkxRZa/ez4yHpPbns8TmOAIM4eVCWQIAxenAEzk5U6Gf6o3Ox4vXb1mb3bk bcl1SXfSZE2vme8+HnE4SuMZb/+CjXcY/lfYH5H58mD1Nb0LU9ze3eKatvb1V8tFhz1ObRK4WXX Dt58BAA== X-Developer-Key: i=vishal.l.verma@intel.com; a=openpgp; fpr=F8682BE134C67A12332A2ED07AFA61BEA3B84DFF Static analysis reports that the error unwinding path in monitor_event() overwrites 'rc' with the return from cxl_event_tracing_disable(). This masks the actual error code from either epoll_wait() or cxl_parse_events() which is the one that should be propagated. Print a spot error in case there's an error while disabling tracing, but otherwise retain the rc from the main body of the function. Fixes: 299f69f974a6 ("cxl/monitor: add a new monitor command for CXL trace events") Cc: Dave Jiang Cc: Dan Williams Signed-off-by: Vishal Verma --- cxl/monitor.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/cxl/monitor.c b/cxl/monitor.c index 31e6f98..749f472 100644 --- a/cxl/monitor.c +++ b/cxl/monitor.c @@ -130,7 +130,8 @@ static int monitor_event(struct cxl_ctx *ctx) } parse_err: - rc = cxl_event_tracing_disable(inst); + if (cxl_event_tracing_disable(inst) < 0) + err(&monitor, "failed to disable tracing\n"); event_en_err: epoll_ctl_err: close(fd); -- 2.39.1