linux-kernel - [PATCH 5.4 289/388] PCI: tegra194: Fix runtime PM imbalance on error

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Message-Id: <20200929110024.452774500@linuxfoundation.org>
Date:   Tue, 29 Sep 2020 13:00:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dinghao Liu <dinghao.liu@....edu.cn>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Thierry Reding <treding@...dia.com>,
        Vidya Sagar <vidyas@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 289/388] PCI: tegra194: Fix runtime PM imbalance on error

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit 1c1dbb2c02623db18a50c61b175f19aead800b4e ]

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

Link: https://lore.kernel.org/r/20200521031355.7022-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Acked-by: Thierry Reding <treding@...dia.com>
Acked-by: Vidya Sagar <vidyas@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pci/controller/dwc/pcie-tegra194.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f89f5acee72d4..c06b05ab9f787 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1395,7 +1395,7 @@ static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
 	ret = pinctrl_pm_select_default_state(dev);
 	if (ret < 0) {
 		dev_err(dev, "Failed to configure sideband pins: %d\n", ret);
-		goto fail_pinctrl;
+		goto fail_pm_get_sync;
 	}
 
 	tegra_pcie_init_controller(pcie);
@@ -1422,9 +1422,8 @@ static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
 
 fail_host_init:
 	tegra_pcie_deinit_controller(pcie);
-fail_pinctrl:
-	pm_runtime_put_sync(dev);
 fail_pm_get_sync:
+	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);
 	return ret;
 }
-- 
2.25.1