From patchwork Wed Oct 9 06:32:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Zekun X-Patchwork-Id: 13827607 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0751A154BE3 for ; Wed, 9 Oct 2024 06:36:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728455813; cv=none; b=klfPnfV+SD5xZlmpiw0TnCiE+AgSQFUOr6hz9zs+BCPVxbPr9ZnTBtXTFV0MhFbuXoG6QR26aIrbYRY2S+DHoVdd/0atk16Xx/jTNjOZ5e1UwF+nk82MMKtuhH1QPC7sypwfoKe/6xbeA029n4RbmLRvUEyTadkK+28ifwSNno4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728455813; c=relaxed/simple; bh=Hc6DILxPQqL3l9UGsJ6qJ7xZnzZVgV80MBG0G0HvsjU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=EvCktTUbshpxIrwNaoP8fm1NoeitzG9+lgNteDbzEGZRDrgcZlcUfP6vDlZEaXD2cfm/mKvlStFrArRVdCr0olkBEUgeCF3O0aUioF+yu/rumy1/OnRjs7Ya5VoIILb0Wdv630oGeXXjLepzIUtZJMz22fM0lUW0SZVaYRlhJpU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.48]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4XNjm15yY9zfcjG; Wed, 9 Oct 2024 14:34:25 +0800 (CST) Received: from kwepemf500003.china.huawei.com (unknown [7.202.181.241]) by mail.maildlp.com (Postfix) with ESMTPS id 7D2021800A0; Wed, 9 Oct 2024 14:36:49 +0800 (CST) Received: from huawei.com (10.175.112.208) by kwepemf500003.china.huawei.com (7.202.181.241) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 9 Oct 2024 14:36:48 +0800 From: Zhang Zekun To: , , , , , , , CC: , Subject: [PATCH 2/4] clk: socfpga: Fix the use of uninitialized variable Date: Wed, 9 Oct 2024 14:32:27 +0800 Message-ID: <20241009063229.121258-3-zhangzekun11@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20241009063229.121258-1-zhangzekun11@huawei.com> References: <20241009063229.121258-1-zhangzekun11@huawei.com> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemf500003.china.huawei.com (7.202.181.241) The of_property_read_u32() can fail and leave the variable uninitialized, which will then be used. Return before using the uninitialized variable. Fixes: 97259e99bdc9 ("clk: socfpga: split clk code") Signed-off-by: Zhang Zekun --- drivers/clk/socfpga/clk-periph.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clk/socfpga/clk-periph.c b/drivers/clk/socfpga/clk-periph.c index 6a4075147b9c..ec4234d9daa1 100644 --- a/drivers/clk/socfpga/clk-periph.c +++ b/drivers/clk/socfpga/clk-periph.c @@ -60,7 +60,8 @@ static void __init __socfpga_periph_init(struct device_node *node, u32 fixed_div; u32 div_reg[3]; - of_property_read_u32(node, "reg", ®); + if (of_property_read_u32(node, "reg", ®)) + return; periph_clk = kzalloc(sizeof(*periph_clk), GFP_KERNEL); if (WARN_ON(!periph_clk))