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PCI: tegra: Fix return value check of pm_runtime_get_sync() 

commit 8851991484 upstream.

pm_runtime_get_sync() returns the device's usage counter. This might
be >0 if the device is already powered up or CONFIG_PM is disabled.

Abort probe function on real error only.

Fixes: da76ba5096 ("PCI: tegra: Add power management support")
Link: https://lore.kernel.org/r/20191216111825.28136-1-david.engraf@sysgo.com
Signed-off-by: David Engraf <david.engraf@sysgo.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Andrew Murray <andrew.murray@arm.com>
Cc: stable@vger.kernel.org	# v4.17+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Engraf 2019-12-16 12:18:25 +01:00 committed by Greg Kroah-Hartman
parent 38b67e60b6
commit 05d56da81d
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/controller/pci-tegra.c
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@ -2798,7 +2798,7 @@ static int tegra_pcie_probe(struct platform_device *pdev)
pm_runtime_enable(pcie->dev);
err = pm_runtime_get_sync(pcie->dev);
if (err) {
if (err < 0) {
dev_err(dev, "fail to enable pcie controller: %d\n", err);
goto teardown_msi;
}