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[5/5] ACPI: Tie ACPI backlight devices to PCI devices if possible

Message ID 1295033065-13450-5-git-send-email-mjg@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Matthew Garrett Jan. 14, 2011, 7:24 p.m. UTC
None
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Patch

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a9eec8c..a18e497 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -782,6 +782,9 @@  static void acpi_video_device_find_cap(struct acpi_video_device *device)
 
 	if (acpi_video_backlight_support()) {
 		struct backlight_properties props;
+		struct pci_dev *pdev;
+		acpi_handle acpi_parent;
+		struct device *parent = NULL;
 		int result;
 		static int count = 0;
 		char *name;
@@ -794,10 +797,20 @@  static void acpi_video_device_find_cap(struct acpi_video_device *device)
 			return;
 		count++;
 
+		acpi_get_parent(device->dev->handle, &acpi_parent);
+
+		pdev = acpi_get_pci_dev(acpi_parent);
+		if (pdev) {
+			parent = &pdev->dev;
+			pci_dev_put(pdev);
+		}
+
 		memset(&props, 0, sizeof(struct backlight_properties));
 		props.type = BACKLIGHT_FIRMWARE;
 		props.max_brightness = device->brightness->count - 3;
-		device->backlight = backlight_device_register(name, NULL, device,
+		device->backlight = backlight_device_register(name,
+							      parent,
+							      device,
 							      &acpi_backlight_ops,
 							      &props);
 		kfree(name);