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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 BAC86C433E8 for ; Sat, 25 Jul 2020 19:51:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98972206D7 for ; Sat, 25 Jul 2020 19:51:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="jxFt2naX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727034AbgGYTvH (ORCPT ); Sat, 25 Jul 2020 15:51:07 -0400 Received: from www.zeus03.de ([194.117.254.33]:34774 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727997AbgGYTvG (ORCPT ); Sat, 25 Jul 2020 15:51:06 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=k1; bh=HxJCPjolVU7R0I uWsThmJoJrJCBnRD7U7CaWs2fvrRY=; b=jxFt2naXCjU0CspMMmaJKXHdGWkwCP BPG34yEBrnOMcsFziTieEVpLIFD423zJNYpkZCnUkXxxo1X2qPCf0JkZDhzyjot6 si/6kV1Z7biwtaIMw/G0gMANv7iLqFpnXjRMZloYcV9W37/a7ihCvS2O9ax5ftDf ZkhTHl663th1Q= Received: (qmail 4064655 invoked from network); 25 Jul 2020 21:51:04 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 25 Jul 2020 21:51:04 +0200 X-UD-Smtp-Session: l3s3148p1@VVztaEmr0JQgAwDPXyGYAKSbnEfVwReQ From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: Alain Volmat , Wolfram Sang Subject: [PATCH 2/2] i2c: slave: add sanity check when unregistering Date: Sat, 25 Jul 2020 21:50:53 +0200 Message-Id: <20200725195053.14334-3-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200725195053.14334-1-wsa+renesas@sang-engineering.com> References: <20200725195053.14334-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Signed-off-by: Wolfram Sang --- drivers/i2c/i2c-core-slave.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/i2c-core-slave.c b/drivers/i2c/i2c-core-slave.c index 549751347e6c..1589179d5eb9 100644 --- a/drivers/i2c/i2c-core-slave.c +++ b/drivers/i2c/i2c-core-slave.c @@ -58,6 +58,9 @@ int i2c_slave_unregister(struct i2c_client *client) { int ret; + if (IS_ERR_OR_NULL(client)) + return -EINVAL; + if (!client->adapter->algo->unreg_slave) { dev_err(&client->dev, "%s: not supported by adapter\n", __func__); return -EOPNOTSUPP; -- 2.20.1