2020-06-05 03:26:18

by Navid Emamdoost

Subject: [PATCH] PCI: rcar: handle the failure case of pm_runtime_get_sync

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.

Signed-off-by: Navid Emamdoost <[email protected]>
---
drivers/pci/controller/pcie-rcar.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
index 759c6542c5c8..6b4181c0710e 100644
--- a/drivers/pci/controller/pcie-rcar.c
+++ b/drivers/pci/controller/pcie-rcar.c
@@ -1137,7 +1137,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
err = pm_runtime_get_sync(pcie->dev);
if (err < 0) {
dev_err(pcie->dev, "pm_runtime_get_sync failed\n");
- goto err_pm_disable;
+ goto err_pm_put;
}

err = rcar_pcie_get_resources(pcie);
@@ -1208,8 +1208,6 @@ static int rcar_pcie_probe(struct platform_device *pdev)

err_pm_put:
pm_runtime_put(dev);
-
-err_pm_disable:
pm_runtime_disable(dev);
pci_free_resource_list(&pcie->resources);

--
2.17.1

2020-06-06 12:21:46

by Marek Vasut

Subject: Re: [PATCH] PCI: rcar: handle the failure case of pm_runtime_get_sync

On 6/5/20 5:23 AM, Navid Emamdoost wrote:
> Calling pm_runtime_get_sync increments the counter even in case of
> failure, causing incorrect ref count. Call pm_runtime_put if
> pm_runtime_get_sync fails.
>
> Signed-off-by: Navid Emamdoost <[email protected]>

This looks like a V2 of
[PATCH] PCI: rcar: fix runtime pm imbalance on error

This looks good to me, but I'm no runtime-pm expert.