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| author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-05-22 17:21:08 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-07-21 21:54:47 -0700 |
| commit | 695794ae0c5bdd9bd06e35b118801e2e9be04f9e (patch) | |
| tree | 71011d17230e67798c6e474ffac10cb93d72919e /drivers/base | |
| parent | 93562b537659fc0f63920fd4d9d24f54e434f4c4 (diff) | |
| download | linux-rpi3-695794ae0c5bdd9bd06e35b118801e2e9be04f9e.tar.gz linux-rpi3-695794ae0c5bdd9bd06e35b118801e2e9be04f9e.tar.bz2 linux-rpi3-695794ae0c5bdd9bd06e35b118801e2e9be04f9e.zip | |
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')
| -rw-r--r-- | drivers/base/class.c | 22 | ||||
| -rw-r--r-- | drivers/base/core.c | 2 |
2 files changed, 14 insertions, 10 deletions
diff --git a/drivers/base/class.c b/drivers/base/class.c index 2eb7048003a8..3918d0e432d4 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); diff --git a/drivers/base/core.c b/drivers/base/core.c index 9ae28aa709d5..9f05de6f80b5 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1289,7 +1289,7 @@ void device_destroy(struct class *class, dev_t devt) { struct device *dev; - dev = class_find_device(class, &devt, __match_devt); + dev = class_find_device(class, NULL, &devt, __match_devt); if (dev) { put_device(dev); device_unregister(dev); |