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=-19.4 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=unavailable 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 79046C47090 for ; Mon, 24 May 2021 15:10:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A98A6141A for ; Mon, 24 May 2021 15:10:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235409AbhEXPKe (ORCPT ); Mon, 24 May 2021 11:10:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:37276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233842AbhEXPB4 (ORCPT ); Mon, 24 May 2021 11:01:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7E6AB61492; Mon, 24 May 2021 14:50:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1621867816; bh=03uit3HcRgBQorQUpuon9ip1oRKD6umUP7MMKYqtLKY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vErcjlfxXSZknkqa3o/4mxdaf/IEBQZlVhwiDq+kbR3igRJxX0+5+kWHng5Nu4M6k k4DlkjhfHeloLFeJlcIQdoIzaBP3eBzhjvxQlxjD2LDe3V3TYQp3cQSu7U/OaPDmpF 8GP0gj/YkgCLOozl+j7PdRIsx5qQ4iyuy5BqMgJXHbXn19rvrTVu37ZqpcxPUtq73X 0jakNzDMgFJccRBEtn/Cz9ismMqdqSTnNjzDFdQlEIVz30nI6/zyfbUHZ63cx9HOxU 2JrfYit6VQhzZy4ESnaHMWST4Z1au8SZWfsRsvUpMd8BTDJ3BTHvhhhY5TkhR0Udxw ZadLtSlLm0QcA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Atul Gopinathan , Takashi Iwai , Greg Kroah-Hartman , Sasha Levin , alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 4.19 06/25] ALSA: sb8: Add a comment note regarding an unused pointer Date: Mon, 24 May 2021 10:49:49 -0400 Message-Id: <20210524145008.2499049-6-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210524145008.2499049-1-sashal@kernel.org> References: <20210524145008.2499049-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 1eb8b61a185b..fb59e5179075 100644 --- a/sound/isa/sb/sb8.c +++ b/sound/isa/sb/sb8.c @@ -109,7 +109,11 @@ 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 (!acard->fm_res) { err = -EBUSY; -- 2.30.2