| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 081/309] PCI: tegra: Fix return value check of pm_runtime_get_sync() | Date | Mon, 10 Feb 2020 04:30:37 -0800 |
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From: David Engraf <david.engraf@sysgo.com>
commit 885199148442f56b880995d703d2ed03b6481a3c 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: da76ba50963b ("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>
--- drivers/pci/controller/pci-tegra.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/pci/controller/pci-tegra.c +++ b/drivers/pci/controller/pci-tegra.c @@ -2798,7 +2798,7 @@ static int tegra_pcie_probe(struct platf 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; }
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