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author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-05-22 17:21:08 -0400 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 21:54:48 -0700 |
commit | a142be856f060ae8106512c0e81a8d6f8746ab0b (patch) | |
tree | 4a90f897816a5b506bf1cced5413bb4a4326a67d /block | |
parent | 5c6f35c5ece8f130cd8ec9ba0d71dc146b46a0f1 (diff) | |
download | lwn-a142be856f060ae8106512c0e81a8d6f8746ab0b.tar.gz lwn-a142be856f060ae8106512c0e81a8d6f8746ab0b.zip |
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.c | 38 |
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; |