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Message-Id: <1216703983-21448-35-git-send-email-gregkh@suse.de>
Date: Mon, 21 Jul 2008 22:18:59 -0700
From: Greg Kroah-Hartman <gregkh@...e.de>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...e.de>,
Kay Sievers <kay.sievers@...y.org>
Subject: [PATCH 35/79] 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@...y.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
block/genhd.c | 38 ++++++++++++++++++++++++++------------
1 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index 10b9ac4..e8c42bf 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;
--
1.5.6.3
--
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