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| author | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2019-08-23 11:35:39 +0200 |
|---|---|---|
| committer | Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2019-08-23 11:35:39 +0200 |
| commit | 6f50fa2a6f1395ad5f59ce7b87730f1f3ea19d76 (patch) | |
| tree | f826145c5bf9c502c033e7b67bcefc30eb0f9eee /drivers/pci/pcie/aspm.c | |
| parent | 5b6cc1277a0536dae20f37d531f29b3416cee670 (diff) | |
| parent | 15d90b242290f228166ea79ee1cc2db6b31a2143 (diff) | |
| download | talos-op-linux-6f50fa2a6f1395ad5f59ce7b87730f1f3ea19d76.tar.gz talos-op-linux-6f50fa2a6f1395ad5f59ce7b87730f1f3ea19d76.zip | |
Merge branch 'master' into for-5.4/logitech
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index e44af7f4d37f..464f8f92653f 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -1170,6 +1170,26 @@ static int pcie_aspm_get_policy(char *buffer, const struct kernel_param *kp) module_param_call(policy, pcie_aspm_set_policy, pcie_aspm_get_policy, NULL, 0644); +/** + * pcie_aspm_enabled - Check if PCIe ASPM has been enabled for a device. + * @pdev: Target device. + */ +bool pcie_aspm_enabled(struct pci_dev *pdev) +{ + struct pci_dev *bridge = pci_upstream_bridge(pdev); + bool ret; + + if (!bridge) + return false; + + mutex_lock(&aspm_lock); + ret = bridge->link_state ? !!bridge->link_state->aspm_enabled : false; + mutex_unlock(&aspm_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(pcie_aspm_enabled); + #ifdef CONFIG_PCIEASPM_DEBUG static ssize_t link_state_show(struct device *dev, struct device_attribute *attr, |
