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spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 449YJ01vgdzDqKW for ; Fri, 1 Mar 2019 13:28:32 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=mediatek.com (client-ip=210.61.82.183; helo=mailgw01.mediatek.com; envelope-from=honghui.zhang@mediatek.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=mediatek.com X-Greylist: delayed 307 seconds by postgrey-1.36 at bilbo; Fri, 01 Mar 2019 13:04:31 AEDT Received: from mailgw01.mediatek.com (mailgw01.mediatek.com [210.61.82.183]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 449XmH6yVJzDqHR for ; Fri, 1 Mar 2019 13:04:31 +1100 (AEDT) X-UUID: 21cdcab5909a4bec87ce57119ebaf975-20190301 X-UUID: 21cdcab5909a4bec87ce57119ebaf975-20190301 Received: from mtkcas08.mediatek.inc [(172.21.101.126)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 699210403; Fri, 01 Mar 2019 09:59:17 +0800 Received: from MTKCAS32.mediatek.inc (172.27.4.184) by mtkmbs08n1.mediatek.inc (172.21.101.55) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 1 Mar 2019 09:59:15 +0800 Received: from [10.17.3.153] (172.27.4.253) by MTKCAS32.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Fri, 1 Mar 2019 09:59:14 +0800 Message-ID: <1551405554.32061.19.camel@mhfsdcap03> Subject: Re: [PATCH 7/8] PCI: mediatek: fix a leaked reference by adding missing of_node_put From: Honghui Zhang To: Wen Yang Date: Fri, 1 Mar 2019 09:59:14 +0800 In-Reply-To: <1551242443-27300-7-git-send-email-wen.yang99@zte.com.cn> References: <1551242443-27300-1-git-send-email-wen.yang99@zte.com.cn> <1551242443-27300-7-git-send-email-wen.yang99@zte.com.cn> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-MTK: N X-Mailman-Approved-At: Fri, 01 Mar 2019 13:27:04 +1100 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: heiko@sntech.de, hayashi.kunihiko@socionext.com, shawn.lin@rock-chips.com, minghuan.Lian@nxp.com, paulus@samba.org, thomas.petazzoni@bootlin.com, ryder.lee@mediatek.com, kishon@ti.com, linux-rockchip@lists.infradead.org, bcm-kernel-feedback-list@broadcom.com, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, wang.yi59@zte.com.cn, rjui@broadcom.com, lorenzo.pieralisi@arm.com, linux-mediatek@lists.infradead.org, tyreld@linux.vnet.ibm.com, matthias.bgg@gmail.com, linux-omap@vger.kernel.org, mingkai.hu@nxp.com, roy.zang@nxp.com, sbranden@broadcom.com, yamada.masahiro@socionext.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, bhelgaas@google.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, 2019-02-27 at 12:40 +0800, Wen Yang wrote: > The call to of_get_next_child returns a node pointer with refcount > incremented thus it must be explicitly decremented after the last > usage. > irq_domain_add_linear also calls of_node_get to increase refcount, > so irq_domain will not be affected when it is released. > > Detected by coccinelle with the following warnings: > ./drivers/pci/controller/pcie-mediatek.c:577:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 567, but without a corresponding object release within this function. > ./drivers/pci/controller/pcie-mediatek.c:583:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 567, but without a corresponding object release within this function. > ./drivers/pci/controller/pcie-mediatek.c:586:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 567, but without a corresponding object release within this function. > > Signed-off-by: Wen Yang > Cc: Ryder Lee > Cc: Lorenzo Pieralisi > Cc: Bjorn Helgaas > Cc: Matthias Brugger > Cc: linux-pci@vger.kernel.org > Cc: linux-mediatek@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > --- > drivers/pci/controller/pcie-mediatek.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c > index 55e471c..e91716a 100644 > --- a/drivers/pci/controller/pcie-mediatek.c > +++ b/drivers/pci/controller/pcie-mediatek.c > @@ -572,6 +572,7 @@ static int mtk_pcie_init_irq_domain(struct mtk_pcie_port *port, > > port->irq_domain = irq_domain_add_linear(pcie_intc_node, PCI_NUM_INTX, > &intx_domain_ops, port); > + of_node_put(pcie_intc_node); > if (!port->irq_domain) { > dev_err(dev, "failed to get INTx IRQ domain\n"); > return -ENODEV; Thanks for fix this. Acked-by: Honghui Zhang