From patchwork Mon May 31 13:14:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 451014 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, URIBL_BLOCKED, 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 8E170C47083 for ; Mon, 31 May 2021 14:22:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71B39613C1 for ; Mon, 31 May 2021 14:22:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233687AbhEaOXj (ORCPT ); Mon, 31 May 2021 10:23:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:46050 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233854AbhEaOVb (ORCPT ); Mon, 31 May 2021 10:21:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E718C619D1; Mon, 31 May 2021 13:45:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1622468714; bh=5jCj7ShKUHLuCxrfqjXLVm7ckSK63N275HJHVpGtBaE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=erW/FEK7ZklIxluSZbSmXTGN//qnzEX24ITtbRPbEMR5MumnJxNPWPaHHSkObxeKI kbCDi4FoW8U7w4j2lMCLziqhagm9qPA5/KlHm15vt/sJfawroEMskbTAZobTa2X9Kv Xf/9LXYPqvybAaRtJ3Y4w3oU1EXgOB9HP60J/LnQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai , Atul Gopinathan , Sasha Levin Subject: [PATCH 5.4 099/177] ALSA: sb8: Add a comment note regarding an unused pointer Date: Mon, 31 May 2021 15:14:16 +0200 Message-Id: <20210531130651.315666007@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210531130647.887605866@linuxfoundation.org> References: <20210531130647.887605866@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Atul Gopinathan [ Upstream commit a28591f61b60fac820c6de59826ffa710e5e314e ] The field "fm_res" of "struct snd_sb8" is never used/dereferenced throughout the sb8.c code. Therefore there is no need for any null value check after the "request_region()". Add a comment note to make developers know about this and prevent any "NULL check" patches on this part of code. Cc: Takashi Iwai Signed-off-by: Atul Gopinathan Link: https://lore.kernel.org/r/20210503115736.2104747-36-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- sound/isa/sb/sb8.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/sound/isa/sb/sb8.c b/sound/isa/sb/sb8.c index 6f1fc8789676..4386c24d2dcc 100644 --- a/sound/isa/sb/sb8.c +++ b/sound/isa/sb/sb8.c @@ -94,7 +94,11 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev) acard = card->private_data; card->private_free = snd_sb8_free; - /* block the 0x388 port to avoid PnP conflicts */ + /* + * Block the 0x388 port to avoid PnP conflicts. + * No need to check this value after request_region, + * as we never do anything with it. + */ acard->fm_res = request_region(0x388, 4, "SoundBlaster FM"); if (port[dev] != SNDRV_AUTO_PORT) {