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Subject[PATCH V2] PCI: qcom: Improve exception handling in qcom_pcie_probe().
Date
From: Qiushi Wu <wu000273@umn.edu>

This function contained improvable implementation details according to
exception handling.
1. pm_runtime_put() should be called after pm_runtime_get_sync() failed,
because the reference count will be increased despite of the failure.
Thus add the missed function call.
2. pm_runtime_disable() are called twice, after the call of phy_init() and
dw_pcie_host_init() failed. Thus remove redundant function calls.


Fixes: 6e5da6f7d824 ("PCI: qcom: Fix error handling in runtime PM support")
Co-developed-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
V2: words adjustments and fix some typos
drivers/pci/controller/dwc/pcie-qcom.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 138e1a2d21cc..10393ab607bf 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1340,8 +1340,7 @@ static int qcom_pcie_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
- pm_runtime_disable(dev);
- return ret;
+ goto err_pm_runtime_put;
}

pci->dev = dev;
@@ -1401,7 +1400,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)

ret = phy_init(pcie->phy);
if (ret) {
- pm_runtime_disable(&pdev->dev);
goto err_pm_runtime_put;
}

@@ -1410,7 +1408,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
ret = dw_pcie_host_init(pp);
if (ret) {
dev_err(dev, "cannot initialize host\n");
- pm_runtime_disable(&pdev->dev);
goto err_pm_runtime_put;
}

--
2.17.1
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