linux-kernel - [PATCH] PCI: rcar: fix runtime pm imbalance on error

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Message-Id: <20200520082228.26881-1-dinghao.liu@zju.edu.cn>
Date:   Wed, 20 May 2020 16:22:28 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] PCI: rcar: fix runtime pm imbalance on error

pm_runtime_get_sync() increments the runtime PM usage counter even
it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 drivers/pci/controller/pcie-rcar.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
index 759c6542c5c8..a9de65438051 100644
--- a/drivers/pci/controller/pcie-rcar.c
+++ b/drivers/pci/controller/pcie-rcar.c
@@ -1207,9 +1207,8 @@ static int rcar_pcie_probe(struct platform_device *pdev)
 	irq_dispose_mapping(pcie->msi.irq1);
 
 err_pm_put:
-	pm_runtime_put(dev);
-
 err_pm_disable:
+	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
 	pci_free_resource_list(&pcie->resources);
 
-- 
2.17.1