diff options
| author |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-30 23:47:14 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-07-15 01:33:11 +0200 |
| commit | 4ec24065a65b4debfdeb591cc01a4aa092651f53 (patch) | |
| tree | aa21b3a9df792b568c0fef3b809e33b2232960c1 /drivers/acpi/dock.c | |
| parent | ACPI / dock: Walk list in reverse order during removal of devices (diff) | |
| download | linux-dev-4ec24065a65b4debfdeb591cc01a4aa092651f53.tar.xz linux-dev-4ec24065a65b4debfdeb591cc01a4aa092651f53.zip | |
ACPI / dock: Simplify dock_init_hotplug() and dock_release_hotplug()
Make dock_init_hotplug() and dock_release_hotplug() slightly simpler
and move some checks in those functions to the code paths where they
are needed.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Diffstat (limited to 'drivers/acpi/dock.c')
| -rw-r--r-- | drivers/acpi/dock.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 41c5d04a89c1..b1170d60a836 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -130,19 +130,16 @@ static int dock_init_hotplug(struct dock_dependent_device *dd, int ret = 0; mutex_lock(&hotplug_lock); - - if (dd->hp_context) { + if (WARN_ON(dd->hp_context)) { ret = -EEXIST; } else { dd->hp_refcount = 1; dd->hp_ops = ops; dd->hp_context = context; dd->hp_release = release; + if (init) + init(context); } - - if (!WARN_ON(ret) && init) - init(context); - mutex_unlock(&hotplug_lock); return ret; } @@ -157,22 +154,17 @@ static int dock_init_hotplug(struct dock_dependent_device *dd, */ static void dock_release_hotplug(struct dock_dependent_device *dd) { - void (*release)(void *) = NULL; - void *context = NULL; - mutex_lock(&hotplug_lock); - if (dd->hp_context && !--dd->hp_refcount) { + void (*release)(void *) = dd->hp_release; + void *context = dd->hp_context; + dd->hp_ops = NULL; - context = dd->hp_context; dd->hp_context = NULL; - release = dd->hp_release; dd->hp_release = NULL; + if (release) + release(context); } - - if (release && context) - release(context); - mutex_unlock(&hotplug_lock); } |