From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 14F5C30F547; Tue, 28 Jul 2026 03:08:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785208130; cv=none; b=grd6XfKRT/vlYay2AnITp6NYfZLrOn4nHKTg4iXW9PPKmsMJ3csufqz1T8rGckpYDHcpdaDm/EeuIeNWTqwTCO+l1zr2a41pNjG3siQuzEyWjW+BzIQAiDTkHXJJZOgffIwKk3SLVRAZoMsXrILwzwv758POAs2bA6Ai0ySA7gw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785208130; c=relaxed/simple; bh=+Ec4bam2IfjUpUauffmeq2kBL0/okP1PIIz3rCrG3ec=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IaWmtoKePm8AIsEAySjl83nEMmfXs4FHGkoMWHQBsS1r6UVe8feX/TRc68DmcexYq6ZMpU/3Rl58d98HmC0V4ekDRRZQQfMD4I+MmvK4LR7IV1ZflfH/JnxYl754nB9U9nkgOEhZhDgpzoHL9tv2o46X618MDi87IBPUQWFyQ1Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: a272457e8a3111f1aa26b74ffac11d73-20260728 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:a1dd2ebd-d5a0-45f0-b5cd-c9edc4518a7c,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:e7bac3a,CLOUDID:2c8ca98b53f1b9014334a41f5d1472d2,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:81|82|102|865|898,TC:nil,Content:0|15|50 ,EDM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,O SA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: a272457e8a3111f1aa26b74ffac11d73-20260728 X-User: liuxixin@kylinos.cn Received: from [127.0.1.1] [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1320906338; Tue, 28 Jul 2026 11:08:40 +0800 From: Xixin Liu To: arm-scmi@vger.kernel.org Cc: sudeep.holla@arm.com, cristian.marussi@arm.com, mturquette@baylibre.com, sboyd@kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, liuxixin@kylinos.cn Subject: [PATCH v2 1/5] firmware: arm_scpi: fix device_node leak in scpi_dev_domain_id Date: Tue, 28 Jul 2026 08:50:00 +0800 Message-ID: <84fdd490495b.v2.1785200642.git.liuxixin@kylinos.cn> In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Mailer: patches/scripts/send-local.py of_parse_phandle_with_args() takes a reference on clkspec.np that must be released with of_node_put(). scpi_dev_domain_id() returned clkspec.args[0] without dropping that reference, so every domain lookup leaked a device node. Paths such as scpi_dvfs_info() / cpufreq init call this per CPU, so the leak accumulates over time. Save the domain id, of_node_put(clkspec.np), then return the saved value. Signed-off-by: Xixin Liu --- drivers/firmware/arm_scpi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index 2acad5fa5a28..43d6d9bbc7a9 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -661,12 +661,15 @@ static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain) static int scpi_dev_domain_id(struct device *dev) { struct of_phandle_args clkspec; + int domain; if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells", 0, &clkspec)) return -EINVAL; - return clkspec.args[0]; + domain = clkspec.args[0]; + of_node_put(clkspec.np); + return domain; } static struct scpi_dvfs_info *scpi_dvfs_info(struct device *dev) -- 2.53.0