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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CFD1EC88E4D for ; Fri, 11 Sep 2026 06:14:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=4NxlkOWR/a1EQCe4p7DRvruEyNU88KPzFhMs/lAUuB8=; b=KiKpYixXUFCptZvWlhis0qGo+V IgGylVKg+TnhO/Xc1+XKQvKiGKSxjEJZ9AOHkeZfUVW/uyubP8EVsk9pDz/aXSDc7+SwN3TJ5u1F1 ZrJPvBljfp4ldlGgliDeHs7zNzjvDSO2V7qfptH4XvEJpF6f/Jf6x8IN/4EdNqfcFhRlj1qB/Y+nh yk3O4BetR/H8V9zDIJN0HKWImGGICaZNAHs8rL029lqOsYtJd4BMrsU6zsg4Qc4lesJr04qsIv/S7 K9DvKTryB/HF1flEXqcRIBfIPJo2fmz0UNkNMhvgkCNkJQjYHPjxhs7I37ZeN7lEUOvkfnFWlPu59 FKvjLOMg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4uWm-0000000FvF1-20ap; Fri, 11 Sep 2026 06:14:24 +0000 Received: from mail-m49197.qiye.163.com ([45.254.49.197]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4uWj-0000000FvEe-3hpa for linux-arm-kernel@lists.infradead.org; Fri, 11 Sep 2026 06:14:23 +0000 Received: from seu.edu.cn (unknown [221.228.238.82]) by smtp.qiye.163.com (Hmail) with ESMTP id 4d62c4fb3; Fri, 11 Sep 2026 14:09:17 +0800 (GMT+08:00) From: Slavin Liu To: linusw@kernel.org, daniel.lezcano@kernel.org, tglx@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, bolin.liu@seu.edu.cn Subject: [PATCH RFC] clocksource: dbx500-prcmu: check timer register mapping Date: Fri, 11 Sep 2026 14:09:17 +0800 Message-Id: <20260911060917.94310-1-bolin.liu@seu.edu.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-HM-Tid: 0aa08f15adb303a1kunm43d905a81c733e X-HM-MType: 10 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlDHktDVhkeHkpJTx9OQ0weSFYeHw 5VEwETFhoSFyQUDg9ZV1kYEgtZQVlJSUpVSUlDVUlIQ1VDSVlXWRYaDxIVHRRZQVlPS0hVSktJQk NDTFVKS0tVS1kG DKIM-Signature: a=rsa-sha256; b=Tso/WePHXZar7n1oxfb8dT2GEVS/faUUYqZIhlxIUAk9XJ3iJYU0WW78Q6eT84VIW/FDzVCz5g5WywVsnxGYfn/+OoDvqmrx/u2bJCLUiQHkWzIFW2OiBMAUncRny2/7lP+weQI8dgFuAREukIlfUjUC7WqVijXA66ndWDnV3+c=; c=relaxed/relaxed; s=default; d=seu.edu.cn; v=1; bh=4NxlkOWR/a1EQCe4p7DRvruEyNU88KPzFhMs/lAUuB8=; h=date:mime-version:subject:message-id:from; X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260910_231422_108639_8A6A2BD9 X-CRM114-Status: UNSURE ( 8.62 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Return -ENOMEM if of_iomap() fails, before reading or configuring the timer register block. Detected by static analysis and reviewed with AI-assisted source auditing. Fixes: 9d2aa8c7961a ("ARM/clocksource: use automatic DT probing for ux500 PRCMU") Assisted-by: LLM Signed-off-by: Slavin Liu --- drivers/clocksource/clksrc-dbx500-prcmu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksource/clksrc-dbx500-prcmu.c index 2fc93e46cea3..1af223b0e896 100644 --- a/drivers/clocksource/clksrc-dbx500-prcmu.c +++ b/drivers/clocksource/clksrc-dbx500-prcmu.c @@ -52,6 +52,8 @@ static struct clocksource clocksource_dbx500_prcmu = { static int __init clksrc_dbx500_prcmu_init(struct device_node *node) { clksrc_dbx500_timer_base = of_iomap(node, 0); + if (!clksrc_dbx500_timer_base) + return -ENOMEM; /* * The A9 sub system expects the timer to be configured as