Add an LED trigger for IDE disk activity to the IDE subsystem.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

Index: linux-2.6.15-rc2/drivers/ide/ide-disk.c
===================================================================
--- linux-2.6.15-rc2.orig/drivers/ide/ide-disk.c	2005-11-28 12:31:02.000000000 +0000
+++ linux-2.6.15-rc2/drivers/ide/ide-disk.c	2005-11-28 15:55:36.000000000 +0000
@@ -60,6 +60,7 @@
 #include <linux/genhd.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
+#include <linux/leds.h>
 
 #define _IDE_DISK
 
@@ -78,6 +79,8 @@
 	struct kref	kref;
 };
 
+INIT_LED_TRIGGER_GLOBAL(ide_led_trigger);
+
 static DECLARE_MUTEX(idedisk_ref_sem);
 
 #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
@@ -315,6 +318,8 @@
 		return ide_stopped;
 	}
 
+	led_trigger_event(ide_led_trigger, 100);
+
 	pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
 		 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 		 block, rq->nr_sectors, (unsigned long)rq->buffer);
@@ -1259,11 +1264,13 @@
 
 static void __exit idedisk_exit (void)
 {
+	led_trigger_unregister_simple(ide_led_trigger);
 	driver_unregister(&idedisk_driver.gen_driver);
 }
 
 static int __init idedisk_init(void)
 {
+	led_trigger_register_simple("ide-disk", &ide_led_trigger);
 	return driver_register(&idedisk_driver.gen_driver);
 }
 
Index: linux-2.6.15-rc2/drivers/ide/ide-io.c
===================================================================
--- linux-2.6.15-rc2.orig/drivers/ide/ide-io.c	2005-11-20 03:25:03.000000000 +0000
+++ linux-2.6.15-rc2/drivers/ide/ide-io.c	2005-11-28 12:31:04.000000000 +0000
@@ -48,6 +48,7 @@
 #include <linux/device.h>
 #include <linux/kmod.h>
 #include <linux/scatterlist.h>
+#include <linux/leds.h>
 
 #include <asm/byteorder.h>
 #include <asm/irq.h>
@@ -107,6 +108,8 @@
  *	it was tagged may be out of order.
  */
 
+extern struct led_trigger *ide_led_trigger;
+
 int ide_end_request (ide_drive_t *drive, int uptodate, int nr_sectors)
 {
 	struct request *rq;
@@ -125,6 +128,9 @@
 		ret = __ide_end_request(drive, rq, uptodate, nr_sectors);
 
 	spin_unlock_irqrestore(&ide_lock, flags);
+
+	led_trigger_event(ide_led_trigger, 0);
+
 	return ret;
 }
 EXPORT_SYMBOL(ide_end_request);