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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>
This commit is contained in:
Johannes Berg 2016-10-26 07:56:59 +02:00
parent b4f0fd4baa
commit e1957dba5b
1 changed files with 4 additions and 1 deletions
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5
net/wireless/sysfs.c
View File

@ -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);
}
}