linux-kernel - [PATCH] PCI: dwc: pci-dra7xx: fix runtime pm imbalance on error

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Message-Id: <20200520084756.31620-1-dinghao.liu@zju.edu.cn>
Date:   Wed, 20 May 2020 16:47:56 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-omap@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] PCI: dwc: pci-dra7xx: 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/dwc/pci-dra7xx.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 3b0e58f2de58..8fd9f2281e02 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -1000,9 +1000,8 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
 	return 0;
 
 err_gpio:
-	pm_runtime_put(dev);
-
 err_get_sync:
+	pm_runtime_put(dev);
 	pm_runtime_disable(dev);
 	dra7xx_pcie_disable_phy(dra7xx);
 
-- 
2.17.1