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authorGreg Kroah-Hartman <gregkh@suse.de>2008-05-22 17:21:08 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 21:54:48 -0700
commita142be856f060ae8106512c0e81a8d6f8746ab0b (patch)
tree4a90f897816a5b506bf1cced5413bb4a4326a67d /block
parent5c6f35c5ece8f130cd8ec9ba0d71dc146b46a0f1 (diff)
block: make blk_lookup_devt use the class iterator function
Use the proper class iterator function instead of mucking around in the internals of the class structures. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'block')
-rw-r--r--block/genhd.c38
1 files changed, 26 insertions, 12 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 10b9ac46c2da..e8c42bfd12be 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -677,24 +677,38 @@ void genhd_media_change_notify(struct gendisk *disk)
EXPORT_SYMBOL_GPL(genhd_media_change_notify);
#endif /* 0 */
+struct find_block {
+ const char *name;
+ int part;
+};
+
+static int match_id(struct device *dev, void *data)
+{
+ struct find_block *find = data;
+
+ if (dev->type != &disk_type)
+ return 0;
+ if (strcmp(dev->bus_id, find->name) == 0) {
+ struct gendisk *disk = dev_to_disk(dev);
+ if (find->part < disk->minors)
+ return 1;
+ }
+ return 0;
+}
+
dev_t blk_lookup_devt(const char *name, int part)
{
struct device *dev;
dev_t devt = MKDEV(0, 0);
+ struct find_block find;
mutex_lock(&block_class_lock);
- list_for_each_entry(dev, &block_class.devices, node) {
- if (dev->type != &disk_type)
- continue;
- if (strcmp(dev->bus_id, name) == 0) {
- struct gendisk *disk = dev_to_disk(dev);
-
- if (part < disk->minors)
- devt = MKDEV(MAJOR(dev->devt),
- MINOR(dev->devt) + part);
- break;
- }
- }
+ find.name = name;
+ find.part = part;
+ dev = class_find_device(&block_class, NULL, (void *)&find, match_id);
+ if (dev)
+ devt = MKDEV(MAJOR(dev->devt),
+ MINOR(dev->devt) + part);
mutex_unlock(&block_class_lock);
return devt;

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