[PATCH 5/5] cdrom: make unregister_cdrom() return void

[Akinobu Mita <akinobu.mita@gmail.com>]

Now unregister_cdrom() always returns 0.
Make it return void and update all callers that check the return value.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Cc: Borislav Petkov <petkovbb@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
---
 Documentation/cdrom/cdrom-standard.tex |    2 +-
 drivers/cdrom/cdrom.c                  |    3 +--
 drivers/cdrom/gdrom.c                  |    4 +++-
 drivers/cdrom/viocd.c                  |    5 +----
 drivers/ide/ide-cd.c                   |    5 ++---
 include/linux/cdrom.h                  |    2 +-
 6 files changed, 9 insertions(+), 12 deletions(-)

Index: 2.6-git/drivers/cdrom/cdrom.c
===================================================================
--- 2.6-git.orig/drivers/cdrom/cdrom.c
+++ 2.6-git/drivers/cdrom/cdrom.c
@@ -442,7 +442,7 @@ int register_cdrom(struct cdrom_device_i
 }
 #undef ENSURE
 
-int unregister_cdrom(struct cdrom_device_info *cdi)
+void unregister_cdrom(struct cdrom_device_info *cdi)
 {
 	cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 
 
@@ -455,7 +455,6 @@ int unregister_cdrom(struct cdrom_device
 
 	cdi->ops->n_minors--;
 	cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
-	return 0;
 }
 
 int cdrom_get_media_event(struct cdrom_device_info *cdi,
Index: 2.6-git/drivers/cdrom/gdrom.c
===================================================================
--- 2.6-git.orig/drivers/cdrom/gdrom.c
+++ 2.6-git/drivers/cdrom/gdrom.c
@@ -827,7 +827,9 @@ static int __devexit remove_gdrom(struct
 	del_gendisk(gd.disk);
 	if (gdrom_major)
 		unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
-	return unregister_cdrom(gd.cd_info);
+	unregister_cdrom(gd.cd_info);
+
+	return 0;
 }
 
 static struct platform_driver gdrom_driver = {
Index: 2.6-git/drivers/cdrom/viocd.c
===================================================================
--- 2.6-git.orig/drivers/cdrom/viocd.c
+++ 2.6-git/drivers/cdrom/viocd.c
@@ -650,10 +650,7 @@ static int viocd_remove(struct vio_dev *
 {
 	struct disk_info *d = &viocd_diskinfo[vdev->unit_address];
 
-	if (unregister_cdrom(&d->viocd_info) != 0)
-		printk(VIOCD_KERN_WARNING
-				"Cannot unregister viocd CD-ROM %s!\n",
-				d->viocd_info.name);
+	unregister_cdrom(&d->viocd_info);
 	del_gendisk(d->viocd_disk);
 	blk_cleanup_queue(d->viocd_disk->queue);
 	put_disk(d->viocd_disk);
Index: 2.6-git/include/linux/cdrom.h
===================================================================
--- 2.6-git.orig/include/linux/cdrom.h
+++ 2.6-git/include/linux/cdrom.h
@@ -995,7 +995,7 @@ extern int cdrom_ioctl(struct file *file
 extern int cdrom_media_changed(struct cdrom_device_info *);
 
 extern int register_cdrom(struct cdrom_device_info *cdi);
-extern int unregister_cdrom(struct cdrom_device_info *cdi);
+extern void unregister_cdrom(struct cdrom_device_info *cdi);
 
 typedef struct {
     int data;
Index: 2.6-git/Documentation/cdrom/cdrom-standard.tex
===================================================================
--- 2.6-git.orig/Documentation/cdrom/cdrom-standard.tex
+++ 2.6-git/Documentation/cdrom/cdrom-standard.tex
@@ -777,7 +777,7 @@ Note that a driver must have one static 
 it may have as many structures $<device>_info$ as there are minor devices
 active. $Register_cdrom()$ builds a linked list from these. 
 
-\subsection{$Int\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
+\subsection{$Void\ unregister_cdrom(struct\ cdrom_device_info * cdi)$}
 
 Unregistering device $cdi$ with minor number $MINOR(cdi\to dev)$ removes
 the minor device from the list. If it was the last registered minor for
Index: 2.6-git/drivers/ide/ide-cd.c
===================================================================
--- 2.6-git.orig/drivers/ide/ide-cd.c
+++ 2.6-git/drivers/ide/ide-cd.c
@@ -2030,9 +2030,8 @@ static void ide_cd_release(struct kref *
 
 	kfree(info->buffer);
 	kfree(info->toc);
-	if (devinfo->handle == drive && unregister_cdrom(devinfo))
-		printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
-				"driver.\n", __FUNCTION__, drive->name);
+	if (devinfo->handle == drive)
+		unregister_cdrom(devinfo);
 	drive->dsc_overlap = 0;
 	drive->driver_data = NULL;
 	blk_queue_prep_rq(drive->queue, NULL);