floppy: use bdev_check_media_change

Switch to use bdev_check_media_change instead of check_disk_change and
call floppy_revalidate manually.  Given that floppy_revalidate only
deals with media change events, the extra call into ->revalidate_disk
from bdev_disk_changed is not required either, so stop wiring up the
method.

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>

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index a563b02..7df79ae 100644 (file)
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -561,6 +561,7 @@ static void floppy_release_irq_and_dma(void);
  * output_byte is automatically disabled when reset is set.
  */
 static void reset_fdc(void);
+static int floppy_revalidate(struct gendisk *disk);
 
 /*
  * These are global variables, as that's the easiest way to give
@@ -3275,7 +3276,8 @@ static int invalidate_drive(struct block_device *bdev)
        /* invalidate the buffer track to force a reread */
        set_bit((long)bdev->bd_disk->private_data, &fake_change);
        process_fd_request();
-       check_disk_change(bdev);
+       if (bdev_check_media_change(bdev))
+               floppy_revalidate(bdev->bd_disk);
        return 0;
 }
 
@@ -4123,7 +4125,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
                        drive_state[drive].last_checked = 0;
                        clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
                                  &drive_state[drive].flags);
-                       check_disk_change(bdev);
+                       if (bdev_check_media_change(bdev))
+                               floppy_revalidate(bdev->bd_disk);
                        if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
                                goto out;
                        if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
@@ -4291,7 +4294,6 @@ static const struct block_device_operations floppy_fops = {
        .ioctl                  = fd_ioctl,
        .getgeo                 = fd_getgeo,
        .check_events           = floppy_check_events,
-       .revalidate_disk        = floppy_revalidate,
 #ifdef CONFIG_COMPAT
        .compat_ioctl           = fd_compat_ioctl,
 #endif