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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AFB4CC433F5 for ; Mon, 8 Nov 2021 10:12:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B44861505 for ; Mon, 8 Nov 2021 10:12:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238625AbhKHKPf (ORCPT ); Mon, 8 Nov 2021 05:15:35 -0500 Received: from mail.skyhub.de ([5.9.137.197]:38212 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231913AbhKHKO4 (ORCPT ); Mon, 8 Nov 2021 05:14:56 -0500 Received: from zn.tnic (p200300ec2f33110088892b77bd117736.dip0.t-ipconnect.de [IPv6:2003:ec:2f33:1100:8889:2b77:bd11:7736]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 29D9B1EC04DF; Mon, 8 Nov 2021 11:12:12 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1636366332; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1CKqF0DE8Be0vB1u1hCxGErnnln1gggVNvwi7ZjWJYY=; b=Y2KW/uok9k083wPWd+LGCZ4Ee3hUJbEvZMNHddmCdMXlFKLsDJT7vveXIXQTO647NITs3C J5lucPD3q0bOJwu55O4iDw3VLHz0krF1jsaPHa04RCrPpseyDOR3PAavfJdMjxv2wchwEi +E77VBKRX5oMStFhA2QAR+/BeYY3B6M= From: Borislav Petkov To: LKML Subject: [PATCH v0 05/42] dca: Check notifier registration return value Date: Mon, 8 Nov 2021 11:11:20 +0100 Message-Id: <20211108101157.15189-6-bp@alien8.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20211108101157.15189-1-bp@alien8.de> References: <20211108101157.15189-1-bp@alien8.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov Avoid homegrown notifier registration checks. No functional changes. Signed-off-by: Borislav Petkov --- drivers/dca/dca-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/dca/dca-core.c b/drivers/dca/dca-core.c index c40c2ebfdae9..3e8f52214652 100644 --- a/drivers/dca/dca-core.c +++ b/drivers/dca/dca-core.c @@ -428,7 +428,8 @@ EXPORT_SYMBOL_GPL(unregister_dca_provider); */ void dca_register_notify(struct notifier_block *nb) { - blocking_notifier_chain_register(&dca_provider_chain, nb); + if (blocking_notifier_chain_register(&dca_provider_chain, nb)) + pr_warn("dca provider notifier already registered\n"); } EXPORT_SYMBOL_GPL(dca_register_notify); -- 2.29.2