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Diffstat (limited to 'block/genhd.c')
-rw-r--r--block/genhd.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/block/genhd.c b/block/genhd.c
index fda9c7a63c29..b922d4801c87 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -653,15 +653,21 @@ void genhd_media_change_notify(struct gendisk *disk)
EXPORT_SYMBOL_GPL(genhd_media_change_notify);
#endif /* 0 */
-dev_t blk_lookup_devt(const char *name)
+dev_t blk_lookup_devt(const char *name, int part)
{
struct device *dev;
dev_t devt = MKDEV(0, 0);
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) {
- devt = dev->devt;
+ struct gendisk *disk = dev_to_disk(dev);
+
+ if (part < disk->minors)
+ devt = MKDEV(MAJOR(dev->devt),
+ MINOR(dev->devt) + part);
break;
}
}
@@ -669,7 +675,6 @@ dev_t blk_lookup_devt(const char *name)
return devt;
}
-
EXPORT_SYMBOL(blk_lookup_devt);
struct gendisk *alloc_disk(int minors)