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driver core: synchronize device shutdown

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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 <shaohua.li@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Shaohua Li 2009-05-12 13:37:57 -07:00 committed by Greg Kroah-Hartman
parent 400ced61fa
commit 401097ea4b
1 changed files with 2 additions and 0 deletions
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2
drivers/base/core.c
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@ -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();
}