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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-10-30 22:39:02 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-10-30 22:39:02 +0400 |
| commit | 31271e9aacaa3c3460cbad8ec62fb5a04a522f5b (patch) | |
| tree | 815c671dac14e0e07959dc88e94c36a994f9c460 /fs/char_dev.c | |
| parent | 32111abb508424d1d110fa471d940160abe251f5 (diff) | |
| parent | dc4dc36056392c0b0b1ca9e81bebff964b9297e0 (diff) | |
| download | linux-31271e9aacaa3c3460cbad8ec62fb5a04a522f5b.tar.xz | |
Merge branch 'spi-tegra' into spi-next
Diffstat (limited to 'fs/char_dev.c')
| -rw-r--r-- | fs/char_dev.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/fs/char_dev.c b/fs/char_dev.c index 3f152b92a94a..afc2bb691780 100644 --- a/fs/char_dev.c +++ b/fs/char_dev.c @@ -471,9 +471,19 @@ static int exact_lock(dev_t dev, void *data) */ int cdev_add(struct cdev *p, dev_t dev, unsigned count) { + int error; + p->dev = dev; p->count = count; - return kobj_map(cdev_map, dev, count, NULL, exact_match, exact_lock, p); + + error = kobj_map(cdev_map, dev, count, NULL, + exact_match, exact_lock, p); + if (error) + return error; + + kobject_get(p->kobj.parent); + + return 0; } static void cdev_unmap(dev_t dev, unsigned count) @@ -498,14 +508,20 @@ void cdev_del(struct cdev *p) static void cdev_default_release(struct kobject *kobj) { struct cdev *p = container_of(kobj, struct cdev, kobj); + struct kobject *parent = kobj->parent; + cdev_purge(p); + kobject_put(parent); } static void cdev_dynamic_release(struct kobject *kobj) { struct cdev *p = container_of(kobj, struct cdev, kobj); + struct kobject *parent = kobj->parent; + cdev_purge(p); kfree(p); + kobject_put(parent); } static struct kobj_type ktype_cdev_default = { |