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=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 64DA5C35242 for ; Sat, 8 Feb 2020 18:34:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D52B20661 for ; Sat, 8 Feb 2020 18:34:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728019AbgBHSds (ORCPT ); Sat, 8 Feb 2020 13:33:48 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:34304 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727902AbgBHS3p (ORCPT ); Sat, 8 Feb 2020 13:29:45 -0500 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1j0UrL-0003fa-76; Sat, 08 Feb 2020 18:29:39 +0000 Received: from ben by deadeye with local (Exim 4.93) (envelope-from ) id 1j0UrK-000CU6-87; Sat, 08 Feb 2020 18:29:38 +0000 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Takashi Iwai" , "Colin Ian King" Date: Sat, 08 Feb 2020 18:20:54 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 115/148] ALSA: cs4236: fix error return comparison of an unsigned integer In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 3.16.82-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Colin Ian King commit d60229d84846a8399257006af9c5444599f64361 upstream. The return from pnp_irq is an unsigned integer type resource_size_t and hence the error check for a positive non-error code is always going to be true. A check for a non-failure return from pnp_irq should in fact be for (resource_size_t)-1 rather than >= 0. Addresses-Coverity: ("Unsigned compared against 0") Fixes: a9824c868a2c ("[ALSA] Add CS4232 PnP BIOS support") Signed-off-by: Colin Ian King Link: https://lore.kernel.org/r/20191122131354.58042-1-colin.king@canonical.com Signed-off-by: Takashi Iwai Signed-off-by: Ben Hutchings --- sound/isa/cs423x/cs4236.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/sound/isa/cs423x/cs4236.c +++ b/sound/isa/cs423x/cs4236.c @@ -293,7 +293,8 @@ static int snd_cs423x_pnp_init_mpu(int d } else { mpu_port[dev] = pnp_port_start(pdev, 0); if (mpu_irq[dev] >= 0 && - pnp_irq_valid(pdev, 0) && pnp_irq(pdev, 0) >= 0) { + pnp_irq_valid(pdev, 0) && + pnp_irq(pdev, 0) != (resource_size_t)-1) { mpu_irq[dev] = pnp_irq(pdev, 0); } else { mpu_irq[dev] = -1; /* disable interrupt */