diff options
| author | Hans Zhang <18255117159@163.com> | 2025-04-19 16:30:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-27 13:07:16 +0300 |
| commit | 92601157e91dfd987e23c985b98933dc23dbc783 (patch) | |
| tree | 1e0e121f38d2b6a1fecbfd811bece2760bfaeb3e /drivers/pci/controller | |
| parent | 8d858a5af407bc4690428679ea644d152ff8c7fd (diff) | |
| download | linux-92601157e91dfd987e23c985b98933dc23dbc783.tar.xz | |
PCI: cadence: Fix runtime atomic count underflow
[ Upstream commit 8805f32a96d3b97cef07999fa6f52112678f7e65 ]
If the call to pci_host_probe() in cdns_pcie_host_setup() fails, PM
runtime count is decremented in the error path using pm_runtime_put_sync().
But the runtime count is not incremented by this driver, but only by the
callers (cdns_plat_pcie_probe/j721e_pcie_probe). And the callers also
decrement the runtime PM count in their error path. So this leads to the
below warning from the PM core:
"runtime PM usage count underflow!"
So fix it by getting rid of pm_runtime_put_sync() in the error path and
directly return the errno.
Fixes: 49e427e6bdd1 ("Merge branch 'pci/host-probe-refactor'")
Signed-off-by: Hans Zhang <18255117159@163.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20250419133058.162048-1-18255117159@163.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/cadence/pcie-cadence-host.c | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c index 5b14f7ee3c79..0a1b11d41a38 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-host.c +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c @@ -558,14 +558,5 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc) if (!bridge->ops) bridge->ops = &cdns_pcie_host_ops; - ret = pci_host_probe(bridge); - if (ret < 0) - goto err_init; - - return 0; - - err_init: - pm_runtime_put_sync(dev); - - return ret; + return pci_host_probe(bridge); } |