Message ID | 20230301185209.274134-4-jjhiblot@traphandler.com (mailing list archive) |
---|---|
State | Handled Elsewhere |
Headers | show
Return-Path: <linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=112.213.38.117; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=<UNKNOWN>) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4PRyLn7182z1yWy for <incoming@patchwork.ozlabs.org>; Thu, 2 Mar 2023 15:10:25 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4PRyLn30Jfz3fR5 for <incoming@patchwork.ozlabs.org>; Thu, 2 Mar 2023 15:10:25 +1100 (AEDT) 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cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Wed, 1 Mar 2023 19:52:59 +0100 From: Jean-Jacques Hiblot <jjhiblot@traphandler.com> To: <saravanak@google.com>, <clement.leger@bootlin.com>, Geert Uytterhoeven <geert+renesas@glider.be>, Magnus Damm <magnus.damm@gmail.com>, Russell King <linux@armlinux.org.uk>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, <zajec5@gmail.com>, Daniel Lezcano <daniel.lezcano@linaro.org>, Thomas Gleixner <tglx@linutronix.de>, Claudiu Beznea <claudiu.beznea@microchip.com>, Marc Zyngier <maz@kernel.org>, <afaerber@suse.de>, Manivannan Sadhasivam <mani@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com>, Chen-Yu Tsai <wens@csie.org>, Jernej Skrabec <jernej.skrabec@gmail.com>, Samuel Holland <samuel@sholland.org>, Rob Herring <robh+dt@kernel.org>, Frank Rowand <frowand.list@gmail.com>, Bjorn Helgaas <bhelgaas@google.com>, Nishanth Menon <nm@ti.com>, <ssantosh@kernel.org>, <mathias.nyman@intel.com>, <gregkh@linuxfoundation.org>, <thierry.reding@gmail.com>, <jonathanh@nvidia.com> Subject: [PATCH 3/3] of: irq: release the node after looking up for "interrupts-extended" Date: Wed, 1 Mar 2023 19:52:09 +0100 Message-ID: <20230301185209.274134-4-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230301185209.274134-1-jjhiblot@traphandler.com> References: <20230301185209.274134-1-jjhiblot@traphandler.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [88.161.25.233] X-ClientProxiedBy: DAG3EX2.emp2.local (172.16.2.22) To DAG1EX1.emp2.local (172.16.2.1) X-Ovh-Tracer-Id: 11460535155466975612 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: 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Series |
of: irq: Fixes refcount issues with of_irq_parse_one()/of_irq_parse_raw()
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diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 95da943fcf075..244f240bc4ac4 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -349,8 +349,12 @@ int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_ar /* Try the new-style interrupts-extended first */ res = of_parse_phandle_with_args(device, "interrupts-extended", "#interrupt-cells", index, out_irq); - if (!res) - return of_irq_parse_raw(addr, out_irq); + if (!res) { + p = out_irq->np; + res = of_irq_parse_raw(addr, out_irq); + of_node_put(p); + return res; + } /* Look for the interrupt parent. */ p = of_irq_find_parent(device);
When of_parse_phandle_with_args() succeeds, a get() is performed on out_irq->np. And another get() is performed in of_irq_parse_raw(), resulting in the refcount being incremented twice. Fixing this by calling put() after of_irq_parse_raw(). Signed-off-by: Jean-Jacques Hiblot <jjhiblot@traphandler.com> --- drivers/of/irq.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)