driver core: synchronize device shutdown

A patch series to make .shutdown execute asynchronously. Some drivers's shutdown can take a lot of time. The patches can help save some shutdown time. The patches use Arjan's async API. This patch: synchronize all tasks submitted by .shutdown Signed-off-by: Shaohua Li <[email protected]> Cc: Arjan van de Ven <[email protected]> Cc: Dmitry Torokhov <[email protected]> Cc: James Bottomley <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
tom3q · Jun 16, 2009 · 401097e · 401097e
1 parent 400ced6
commit 401097e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/base/core.c b/drivers/base/core.c
@@ -22,6 +22,7 @@
 #include <linux/kallsyms.h>
 #include <linux/semaphore.h>
 #include <linux/mutex.h>
+#include <linux/async.h>
 
 #include "base.h"
 #include "power/power.h"
@@ -1665,4 +1666,5 @@ void device_shutdown(void)
 	kobject_put(sysfs_dev_char_kobj);
 	kobject_put(sysfs_dev_block_kobj);
 	kobject_put(dev_kobj);
+	async_synchronize_full();
 }