ide: remove ide_drive_t.usage

This field is no longer used by the core IDE code so fix ide-{disk,floppy}
drivers to keep openers count in the driver specific objects and remove
it from ide-{cd,scsi,tape} drivers (it was write-only).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 4 insertions, 11 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index e6e350cdfbf9..624d48841533 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -3353,21 +3353,16 @@ static int idecd_open(struct inode * inode, struct file * file)
 {
         struct gendisk *disk = inode->i_bdev->bd_disk;
         struct cdrom_info *info;
-        ide_drive_t *drive;
         int rc = -ENOMEM;
 
         if (!(info = ide_cd_get(disk)))
                 return -ENXIO;
 
-        drive = info->drive;
-
-        drive->usage++;
-
         if (!info->buffer)
-                info->buffer = kmalloc(SECTOR_BUFFER_SIZE,
-                                        GFP_KERNEL|__GFP_REPEAT);
-        if (!info->buffer || (rc = cdrom_open(&info->devinfo, inode, file)))
-                drive->usage--;
+                info->buffer = kmalloc(SECTOR_BUFFER_SIZE, GFP_KERNEL|__GFP_REPEAT);
+
+        if (info->buffer)
+                rc = cdrom_open(&info->devinfo, inode, file);
 
         if (rc < 0)
                 ide_cd_put(info);
@@ -3379,10 +3374,8 @@ static int idecd_release(struct inode * inode, struct file * file)
 {
         struct gendisk *disk = inode->i_bdev->bd_disk;
         struct cdrom_info *info = ide_cd_g(disk);
-        ide_drive_t *drive = info->drive;
 
         cdrom_release (&info->devinfo, file);
-        drive->usage--;
 
         ide_cd_put(info);