This is a note to let you know that I've just added the patch titled
PCI: tegra: Fix runtime PM imbalance on error
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-tegra-fix-runtime-pm-imbalance-on-error.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f2754e093cb35c4262d1cdb076af71c19557f3a8
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Thu May 21 10:47:09 2020 +0800
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@xxxxxxxxxx
Signed-off-by: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
