lkml.org 
[lkml]   [2015]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] PM / sleep: ensure deferred probe workqueue is finished in wait_for_device_probe
Date
Now wait_for_device_probe() waits for currently executing probes to finish,
but it doesn't take into account deferred probing mechanism. As result,
nothing prevents deferred probe workqueue to continue probing devices right
after wait_for_device_probe() is finished.

Hence, lest ensure deferred probe workqueue is finished in
wait_for_device_probe() before proceeding.

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
drivers/base/dd.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index be0eb46..98de1a5 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -391,6 +391,10 @@ int driver_probe_done(void)
*/
void wait_for_device_probe(void)
{
+ /* wait for the deferred probe workqueue to finish */
+ if (driver_deferred_probe_enable)
+ flush_workqueue(deferred_wq);
+
/* wait for the known devices to complete their probing */
wait_event(probe_waitqueue, atomic_read(&probe_count) == 0);
async_synchronize_full();
--
2.5.1


\
 
 \ /
  Last update: 2015-10-08 19:21    [W:7.018 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site