From a142be856f060ae8106512c0e81a8d6f8746ab0b Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 22 May 2008 17:21:08 -0400 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- block/genhd.c | 38 ++++++++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 10b9ac46c2d..e8c42bfd12b 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; -- 2.20.1