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-rw-r--r--drivers/ide/ide-acpi.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
index 333d4053e727..b6940992a6ff 100644
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -97,6 +97,17 @@ bool ide_port_acpi(ide_hwif_t *hwif)
return ide_noacpi == 0 && hwif->acpidata;
}
+static acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
+{
+ struct acpi_device *adev;
+
+ if (!handle || acpi_bus_get_device(handle, &adev))
+ return NULL;
+
+ adev = acpi_find_child_device(adev, addr, false);
+ return adev ? adev->handle : NULL;
+}
+
/**
* ide_get_dev_handle - finds acpi_handle and PCI device.function
* @dev: device to locate