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PCI: tegra: Fix runtime PM imbalance on error 

[ 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>
This commit is contained in:
Dinghao Liu 2020-05-21 10:47:09 +08:00 committed by Greg Kroah-Hartman
parent 5cddba546a
commit dac34dd4ef
1 changed files with 1 additions and 2 deletions
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3
drivers/pci/controller/pci-tegra.c
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@ -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);