cfg80211: shut down interfaces on failed resume

If resume fails, we should shut down all interfaces as the
hardware is probably dead. This was/is already done now in
mac80211, but we need to change that due to locking issues,
so move it here and do it without the wiphy lock held.

Cc: stable@vger.kernel.org
Fixes: 2fe8ef106238 ("cfg80211: change netdev registration/unregistration semantics")
Link: https://lore.kernel.org/r/20210608113226.d564ca69de7c.I2e3c3e5d410b72a4f63bade4fb075df041b3d92f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
index 9b959e3..0c3f05c 100644 (file)
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -133,6 +133,10 @@ static int wiphy_resume(struct device *dev)
        if (rdev->wiphy.registered && rdev->ops->resume)
                ret = rdev_resume(rdev);
        wiphy_unlock(&rdev->wiphy);
+
+       if (ret)
+               cfg80211_shutdown_all_interfaces(&rdev->wiphy);
+
        rtnl_unlock();
 
        return ret;