linux-kernel - [PATCH -next] PCI: rcar: Fix PM reference leak in rcar_pcie_ep

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Date:   Fri, 21 May 2021 21:05:54 +0800
From:   Zou Wei <zou_wei@...wei.com>
To:     <marek.vasut+renesas@...il.com>,
        <yoshihiro.shimoda.uh@...esas.com>, <lorenzo.pieralisi@....com>,
        <robh@...nel.org>, <kw@...ux.com>, <bhelgaas@...gle.com>
CC:     <linux-pci@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Zou Wei <zou_wei@...wei.com>
Subject: [PATCH -next] PCI: rcar: Fix PM reference leak in rcar_pcie_ep_probe()

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zou Wei <zou_wei@...wei.com>
---
 drivers/pci/controller/pcie-rcar-ep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-rcar-ep.c b/drivers/pci/controller/pcie-rcar-ep.c
index b4a288e..8a8c46c 100644
--- a/drivers/pci/controller/pcie-rcar-ep.c
+++ b/drivers/pci/controller/pcie-rcar-ep.c
@@ -492,7 +492,7 @@ static int rcar_pcie_ep_probe(struct platform_device *pdev)
 	pcie->dev = dev;
 
 	pm_runtime_enable(dev);
-	err = pm_runtime_get_sync(dev);
+	err = pm_runtime_resume_and_get(dev);
 	if (err < 0) {
 		dev_err(dev, "pm_runtime_get_sync failed\n");
 		goto err_pm_disable;
-- 
2.6.2