cfg80211: process events caused by suspend before suspending

When suspending without WoWLAN, cfg80211 will ask drivers to
disconnect. Even when the driver does this synchronously, and
immediately returns with a notification, cfg80211 schedules
the handling thereof to a workqueue, and may then call back
into the driver when the driver was already suspended/ing.

Fix this by processing all events caused by cfg80211_leave_all()
directly after that function returns. The driver still needs to
do the right thing here and wait for the firmware response, but
that is - at least - true for mwifiex where this occurred.

Reported-by: Amitkumar Karwar <akarwar@marvell.com>
Tested-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
index 0082f4b01795..14b3f007826d 100644
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -104,13 +104,16 @@ static int wiphy_suspend(struct device *dev)
 
         rtnl_lock();
         if (rdev->wiphy.registered) {
-                if (!rdev->wiphy.wowlan_config)
+                if (!rdev->wiphy.wowlan_config) {
                         cfg80211_leave_all(rdev);
+                        cfg80211_process_rdev_events(rdev);
+                }
                 if (rdev->ops->suspend)
                         ret = rdev_suspend(rdev, rdev->wiphy.wowlan_config);
                 if (ret == 1) {
                         /* Driver refuse to configure wowlan */
                         cfg80211_leave_all(rdev);
+                        cfg80211_process_rdev_events(rdev);
                         ret = rdev_suspend(rdev, NULL);
                 }
         }