tdfxfb: fix frame buffer name overrun

[linux-2.6-omap-h63xx.git] / block / genhd.c

diff --git a/block/genhd.c b/block/genhd.c
index f34befc5484737a446f66da8afd81cf1b993b499..e0ce23ac2ece84b24a283f9ae9203ec3291f2f78 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -190,7 +190,6 @@ void add_disk(struct gendisk *disk)
                            disk->minors, NULL, exact_match, exact_lock, disk);
        register_disk(disk);
        blk_register_queue(disk);
-       blk_register_filter(disk);
 
        bdi = &disk->queue->backing_dev_info;
        bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor));
@@ -203,7 +202,6 @@ EXPORT_SYMBOL(del_gendisk); /* in partitions/check.c */
 
 void unlink_gendisk(struct gendisk *disk)
 {
-       blk_unregister_filter(disk);
        sysfs_remove_link(&disk->dev.kobj, "bdi");
        bdi_unregister(&disk->queue->backing_dev_info);
        blk_unregister_queue(disk);
@@ -309,12 +307,14 @@ static void *part_start(struct seq_file *part, loff_t *pos)
        loff_t k = *pos;
 
        if (!k)
-               seq_puts(part, "major minor  #blocks  name\n\n");
+               part->private = (void *)1LU;    /* tell show to print header */
 
        mutex_lock(&block_class_lock);
        dev = class_find_device(&block_class, NULL, &k, find_start);
-       if (dev)
+       if (dev) {
+               put_device(dev);
                return dev_to_disk(dev);
+       }
        return NULL;
 }
 
@@ -331,8 +331,10 @@ static void *part_next(struct seq_file *part, void *v, loff_t *pos)
        struct device *dev;
        ++*pos;
        dev = class_find_device(&block_class, &gp->dev, NULL, find_next);
-       if (dev)
+       if (dev) {
+               put_device(dev);
                return dev_to_disk(dev);
+       }
        return NULL;
 }
 
@@ -347,6 +349,17 @@ static int show_partition(struct seq_file *part, void *v)
        int n;
        char buf[BDEVNAME_SIZE];
 
+       /*
+        * Print header if start told us to do.  This is to preserve
+        * the original behavior of not printing header if no
+        * partition exists.  This hackery will be removed later with
+        * class iteration clean up.
+        */
+       if (part->private) {
+               seq_puts(part, "major minor  #blocks  name\n\n");
+               part->private = NULL;
+       }
+
        /* Don't show non-partitionable removeable devices or empty devices */
        if (!get_capacity(sgp) ||
                        (sgp->minors == 1 && (sgp->flags & GENHD_FL_REMOVABLE)))
@@ -573,8 +586,10 @@ static void *diskstats_start(struct seq_file *part, loff_t *pos)
 
        mutex_lock(&block_class_lock);
        dev = class_find_device(&block_class, NULL, &k, find_start);
-       if (dev)
+       if (dev) {
+               put_device(dev);
                return dev_to_disk(dev);
+       }
        return NULL;
 }
 
@@ -585,8 +600,10 @@ static void *diskstats_next(struct seq_file *part, void *v, loff_t *pos)
 
        ++*pos;
        dev = class_find_device(&block_class, &gp->dev, NULL, find_next);
-       if (dev)
+       if (dev) {
+               put_device(dev);
                return dev_to_disk(dev);
+       }
        return NULL;
 }
 
@@ -714,10 +731,12 @@ dev_t blk_lookup_devt(const char *name, int part)
        mutex_lock(&block_class_lock);
        find.name = name;
        find.part = part;
-       dev = class_find_device(&block_class, NULL, (void *)&find, match_id);
-       if (dev)
+       dev = class_find_device(&block_class, NULL, &find, match_id);
+       if (dev) {
+               put_device(dev);
                devt = MKDEV(MAJOR(dev->devt),
                             MINOR(dev->devt) + part);
+       }
        mutex_unlock(&block_class_lock);
 
        return devt;