Driver core: Make block devices create the proper symlink name

[Greg Kroah-Hartman]

Block devices need to add the block device name to the symlink they put
in the device directory, otherwise multiple symlinks of the same name
can be created.  This matches the class system, which works the same
way, we just forgot to convert block at the same time.


Cc: Pete Zaitcev <zaitcev@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 fs/partitions/check.c |   27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

--- gregkh-2.6.orig/fs/partitions/check.c
+++ gregkh-2.6/fs/partitions/check.c
@@ -325,12 +325,31 @@ void add_partition(struct gendisk *disk,
 	disk->part[part-1] = p;
 }
 
+static char *make_block_name(struct gendisk *disk)
+{
+	char *name;
+	static char *block_str = "block:";
+	int size;
+
+	size = strlen(block_str) + strlen(disk->disk_name) + 1;
+	name = kmalloc(size, GFP_KERNEL);
+	if (!name)
+		return NULL;
+	strcpy(name, block_str);
+	strcat(name, disk->disk_name);
+	return name;
+}
+
 static void disk_sysfs_symlinks(struct gendisk *disk)
 {
 	struct device *target = get_device(disk->driverfs_dev);
 	if (target) {
+		char *disk_name = make_block_name(disk);
 		sysfs_create_link(&disk->kobj,&target->kobj,"device");
-		sysfs_create_link(&target->kobj,&disk->kobj,"block");
+		if (disk_name) {
+			sysfs_create_link(&target->kobj,&disk->kobj,disk_name);
+			kfree(disk_name);
+		}
 	}
 }
 
@@ -444,8 +463,12 @@ void del_gendisk(struct gendisk *disk)
 	disk->stamp = 0;
 
 	if (disk->driverfs_dev) {
+		char *disk_name = make_block_name(disk);
 		sysfs_remove_link(&disk->kobj, "device");
-		sysfs_remove_link(&disk->driverfs_dev->kobj, "block");
+		if (disk_name) {
+			sysfs_remove_link(&disk->driverfs_dev->kobj, disk_name);
+			kfree(disk_name);
+		}
 		put_device(disk->driverfs_dev);
 	}
 	ndevfs_remove(kobject_name(&disk->kobj));
-
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