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Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r-- | drivers/pci/pci-acpi.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index c27dbb2294e3..b63db75a3dbf 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -941,6 +941,29 @@ void pci_set_acpi_fwnode(struct pci_dev *dev) acpi_pci_find_companion(&dev->dev)); } +/** + * pci_dev_acpi_reset - do a function level reset using _RST method + * @dev: device to reset + * @probe: check if _RST method is included in the acpi_device context. + */ +int pci_dev_acpi_reset(struct pci_dev *dev, int probe) +{ + acpi_handle handle = ACPI_HANDLE(&dev->dev); + + if (!handle || !acpi_has_method(handle, "_RST")) + return -ENOTTY; + + if (probe) + return 0; + + if (ACPI_FAILURE(acpi_evaluate_object(handle, "_RST", NULL, NULL))) { + pci_warn(dev, "ACPI _RST failed\n"); + return -ENOTTY; + } + + return 0; +} + static bool acpi_pci_power_manageable(struct pci_dev *dev) { struct acpi_device *adev = ACPI_COMPANION(&dev->dev); |