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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 08B88C388F7 for ; Fri, 6 Nov 2020 01:52:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0664206FB for ; Fri, 6 Nov 2020 01:52:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732774AbgKFBwW (ORCPT ); Thu, 5 Nov 2020 20:52:22 -0500 Received: from m17618.mail.qiye.163.com ([59.111.176.18]:9123 "EHLO m17618.mail.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730414AbgKFBwW (ORCPT ); Thu, 5 Nov 2020 20:52:22 -0500 X-Greylist: delayed 350 seconds by postgrey-1.27 at vger.kernel.org; Thu, 05 Nov 2020 20:52:22 EST Received: from vivo-HP-ProDesk-680-G4-PCI-MT.vivo.xyz (unknown [58.251.74.231]) by m17618.mail.qiye.163.com (Hmail) with ESMTPA id 4D4C64E177F; Fri, 6 Nov 2020 09:46:29 +0800 (CST) From: Wang Qing To: Hartley Sweeten , Alexander Sverdlin , Russell King , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Wang Qing Subject: [PATCH] arm: Add clk_get_rate input parameter null check Date: Fri, 6 Nov 2020 09:46:15 +0800 Message-Id: <1604627175-16710-1-git-send-email-wangqing@vivo.com> X-Mailer: git-send-email 2.7.4 X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZS1VLWVdZKFlBSE83V1ktWUFJV1kPCR oVCBIfWUFZQ0hKSk5PSx1OGBhCVkpNS09NSUxKQ0JNSk5VEwETFhoSFyQUDg9ZV1kWGg8SFR0UWU FZT0tIVUpKS0hKQ1VLWQY+ X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6OiI6Lxw4Dz8oCR0NEAw#TRQo SChPC01VSlVKTUtPTUlMSkJLS0hOVTMWGhIXVQwaFRwKEhUcOw0SDRRVGBQWRVlXWRILWUFZTkNV SU5KVUxPVUlISllXWQgBWUFKTk9ONwY+ X-HM-Tid: 0a759b3bcf079376kuws4d4c64e177f Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The input parameter of clk_get_rate() is checked with IS_ERR(), so here we need to check null on clk. Signed-off-by: Wang Qing --- arch/arm/mach-ep93xx/clock.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c index 2810eb5..4313b2f --- a/arch/arm/mach-ep93xx/clock.c +++ b/arch/arm/mach-ep93xx/clock.c @@ -321,6 +321,9 @@ static unsigned long get_uart_rate(struct clk *clk) unsigned long clk_get_rate(struct clk *clk) { + if (!clk) + return 0; + if (clk->get_rate) return clk->get_rate(clk); -- 2.7.4