From nobody Fri Sep 25 14:32:10 2026 Received: from mail-m49197.qiye.163.com (mail-m49197.qiye.163.com [45.254.49.197]) (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 8F4211F1534 for ; Fri, 11 Sep 2026 06:09:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.254.49.197 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789106970; cv=none; b=INwSVz1t57CrbNqcXg91qAw4ZDUBDQhqddjOTp3u+I2rAYDsqxnP2jIGMY+YqZfoTYGDWS8Mxq3WvOzto9F4n4UxMBm2fKc7UE5fHgJwqiVmOx6bj/d4l/8xo2LNYkks6MRTiXLGJyusmKXBu1YfgxEUY1go9cbwWu7/kueQ6Pk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789106970; c=relaxed/simple; bh=SkX7nwJaN2CZXz0W3GZiHOtOPYAkWX5klGjmld+UJSI=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=tFfpGKhnXUBtlQH4zdpGX7bfTtuBtInIyu7eQXuJ2m93FyF6mTMURB6HDhsJd+oi7ltUKJJnsNA0MLcUjgORrDN0Ct5fq4COjCfFBFxqCd3H25VAi/Pe5DbCxthkTitozHgbJF0PbyQVwYlF1kgNFr2iHFfCppHMA0PDsteaPOo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn; spf=pass smtp.mailfrom=seu.edu.cn; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b=Tso/WePH; arc=none smtp.client-ip=45.254.49.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b="Tso/WePH" 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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; Content-Type: text/plain; charset="utf-8" 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 P= RCMU") Assisted-by: LLM Signed-off-by: Slavin Liu Reviewed-by: Linus Walleij --- drivers/clocksource/clksrc-dbx500-prcmu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clocksource/clksrc-dbx500-prcmu.c b/drivers/clocksourc= e/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 =3D { static int __init clksrc_dbx500_prcmu_init(struct device_node *node) { clksrc_dbx500_timer_base =3D of_iomap(node, 0); + if (!clksrc_dbx500_timer_base) + return -ENOMEM; =20 /* * The A9 sub system expects the timer to be configured as