[PATCH AUTOSEL 5.4 304/330] PCI: tegra: Fix runtime PM imbalance on error

Sasha Levin
2020-09-18T02:54:21Z

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

[ Upstream commit fcee90cdf6f3a3a371add04d41528d5ba9c3b411 ]

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.

Also, call pm_runtime_disable() when pm_runtime_get_sync() returns
an error code.

Link: https://lore.kernel.org/r/20200521024709.2368-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pci/controller/pci-tegra.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
index b71e753419c2d..cfa3c83d6cc74 100644
--- a/drivers/pci/controller/pci-tegra.c
+++ b/drivers/pci/controller/pci-tegra.c
@@ -2768,7 +2768,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
err = pm_runtime_get_sync(pcie->dev);
if (err < 0) {
dev_err(dev, "fail to enable pcie controller: %d\n", err);
- goto teardown_msi;
+ goto pm_runtime_put;
}

err = tegra_pcie_request_resources(pcie);
@@ -2808,7 +2808,6 @@ free_resources:
pm_runtime_put:
pm_runtime_put_sync(pcie->dev);
pm_runtime_disable(pcie->dev);
-teardown_msi:
tegra_pcie_msi_teardown(pcie);
put_resources:
tegra_pcie_put_resources(pcie);
--
2.25.1