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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 21:54:47 -0700
commit695794ae0c5bdd9bd06e35b118801e2e9be04f9e (patch)
tree71011d17230e67798c6e474ffac10cb93d72919e /drivers/base/class.c
parent93562b537659fc0f63920fd4d9d24f54e434f4c4 (diff)
Driver Core: add ability for class_find_device to start in middle of list
This mirrors the functionality that driver_find_device has as well. We add a start variable, and all callers of the function are fixed up at the same time. The block layer will be using this new functionality in a follow-on patch. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/base/class.c')
-rw-r--r--drivers/base/class.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c
index 2eb7048003a..3918d0e432d 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -302,6 +302,7 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
/**
* class_find_device - device iterator for locating a particular device
* @class: the class we're iterating
+ * @start: Device to begin with
* @data: data for the match function
* @match: function to check device
*
@@ -319,8 +320,9 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
* re-acquired in @match, otherwise it will self-deadlocking. For
* example, calls to add or remove class members would be verboten.
*/
-struct device *class_find_device(struct class *class, void *data,
- int (*match)(struct device *, void *))
+struct device *class_find_device(struct class *class, struct device *start,
+ void *data,
+ int (*match)(struct device *, void *))
{
struct device *dev;
int found = 0;
@@ -330,15 +332,17 @@ struct device *class_find_device(struct class *class, void *data,
down(&class->sem);
list_for_each_entry(dev, &class->devices, node) {
+ if (start) {
+ if (start == dev)
+ start = NULL;
+ continue;
+ }
dev = get_device(dev);
- if (dev) {
- if (match(dev, data)) {
- found = 1;
- break;
- } else
- put_device(dev);
- } else
+ if (match(dev, data)) {
+ found = 1;
break;
+ } else
+ put_device(dev);
}
up(&class->sem);