swim: simplify media change handling

floppy_revalidate mostly duplicates work already done in floppy_open
despite only beeing called from floppy_open.  Remove the function and
just clear the ->ejected flag directly under the right condition.

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/swim.c b/drivers/block/swim.c
index d4565c5..52dd1ef 100644 (file)
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -217,8 +217,6 @@ extern int swim_read_sector_header(struct swim __iomem *base,
 extern int swim_read_sector_data(struct swim __iomem *base,
                                 unsigned char *data);
 
-static int floppy_revalidate(struct gendisk *disk);
-
 static DEFINE_MUTEX(swim_mutex);
 static inline void set_swim_mode(struct swim __iomem *base, int enable)
 {
@@ -640,8 +638,8 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
                return 0;
 
        if (mode & (FMODE_READ|FMODE_WRITE)) {
-               if (bdev_check_media_change(bdev))
-                       floppy_revalidate(bdev->bd_disk);
+               if (bdev_check_media_change(bdev) && fs->disk_in)
+                       fs->ejected = 0;
                if ((mode & FMODE_WRITE) && fs->write_protected) {
                        err = -EROFS;
                        goto out;
@@ -738,24 +736,6 @@ static unsigned int floppy_check_events(struct gendisk *disk,
        return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
-static int floppy_revalidate(struct gendisk *disk)
-{
-       struct floppy_state *fs = disk->private_data;
-       struct swim __iomem *base = fs->swd->base;
-
-       swim_drive(base, fs->location);
-
-       if (fs->ejected)
-               setup_medium(fs);
-
-       if (!fs->disk_in)
-               swim_motor(base, OFF);
-       else
-               fs->ejected = 0;
-
-       return !fs->disk_in;
-}
-
 static const struct block_device_operations floppy_fops = {
        .owner           = THIS_MODULE,
        .open            = floppy_unlocked_open,