ide-gd: stop using the disk events mechanism

ide-gd is only using the disk events mechanism to be able to force an
invalidation and partition scan on opening removable media.  Just open
code the logic without invoving the block layer.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

3 files changed, 7 insertions, 48 deletions

diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 1d3407d7e095..34b9441084f8 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -739,12 +739,9 @@ static void ide_disk_setup(ide_drive_t *drive)
 	set_wcache(drive, 1);
 
 	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
-	    (drive->head == 0 || drive->head > 16)) {
+	    (drive->head == 0 || drive->head > 16))
 		printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
 			drive->name, drive->head);
-		drive->dev_flags &= ~IDE_DFLAG_ATTACH;
-	} else
-		drive->dev_flags |= IDE_DFLAG_ATTACH;
 }
 
 static void ide_disk_flush(ide_drive_t *drive)
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index af7503b47dbe..f5a2870aaf54 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -516,8 +516,6 @@ static void ide_floppy_setup(ide_drive_t *drive)
 	(void) ide_floppy_get_capacity(drive);
 
 	ide_proc_register_driver(drive, floppy->driver);
-
-	drive->dev_flags |= IDE_DFLAG_ATTACH;
 }
 
 static void ide_floppy_flush(ide_drive_t *drive)
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 05c26986637b..661e2aa9c967 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -225,8 +225,12 @@ static int ide_gd_open(struct block_device *bdev, fmode_t mode)
 		 * and the door_lock is irrelevant at this point.
 		 */
 		drive->disk_ops->set_doorlock(drive, disk, 1);
-		drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
-		check_disk_change(bdev);
+		if (__invalidate_device(bdev, true))
+			pr_warn("VFS: busy inodes on changed media %s\n",
+				bdev->bd_disk->disk_name);
+		drive->disk_ops->get_capacity(drive);
+		set_capacity(disk, ide_gd_capacity(drive));
+		set_bit(BDEV_NEED_PART_SCAN, &bdev->bd_flags);
 	} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
 		ret = -EBUSY;
 		goto out_put_idkp;
@@ -284,32 +288,6 @@ static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static unsigned int ide_gd_check_events(struct gendisk *disk,
-					unsigned int clearing)
-{
-	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
-	ide_drive_t *drive = idkp->drive;
-	bool ret;
-
-	/* do not scan partitions twice if this is a removable device */
-	if (drive->dev_flags & IDE_DFLAG_ATTACH) {
-		drive->dev_flags &= ~IDE_DFLAG_ATTACH;
-		return 0;
-	}
-
-	/*
-	 * The following is used to force revalidation on the first open on
-	 * removeable devices, and never gets reported to userland as
-	 * DISK_EVENT_FLAG_UEVENT isn't set in genhd->event_flags.
-	 * This is intended as removable ide disk can't really detect
-	 * MEDIA_CHANGE events.
-	 */
-	ret = drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED;
-	drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
-
-	return ret ? DISK_EVENT_MEDIA_CHANGE : 0;
-}
-
 static void ide_gd_unlock_native_capacity(struct gendisk *disk)
 {
 	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
@@ -320,18 +298,6 @@ static void ide_gd_unlock_native_capacity(struct gendisk *disk)
 		disk_ops->unlock_native_capacity(drive);
 }
 
-static int ide_gd_revalidate_disk(struct gendisk *disk)
-{
-	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
-	ide_drive_t *drive = idkp->drive;
-
-	if (ide_gd_check_events(disk, 0))
-		drive->disk_ops->get_capacity(drive);
-
-	set_capacity(disk, ide_gd_capacity(drive));
-	return 0;
-}
-
 static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
 			     unsigned int cmd, unsigned long arg)
 {
@@ -364,9 +330,7 @@ static const struct block_device_operations ide_gd_ops = {
 	.compat_ioctl		= ide_gd_compat_ioctl,
 #endif
 	.getgeo			= ide_gd_getgeo,
-	.check_events		= ide_gd_check_events,
 	.unlock_native_capacity	= ide_gd_unlock_native_capacity,
-	.revalidate_disk	= ide_gd_revalidate_disk
 };
 
 static int ide_gd_probe(ide_drive_t *drive)