mac80211: clear subdir_stations when removing debugfs
authorTom Hughes <tom@compton.nu>
Mon, 29 Jun 2015 18:41:49 +0000 (19:41 +0100)
committerJohannes Berg <johannes.berg@intel.com>
Fri, 17 Jul 2015 08:53:19 +0000 (10:53 +0200)
commit4479004e6409087d1b4986881dc98c6c15dffb28
treefa6e6d51b9a0b4cd59eb69558b7fb1cc80c0ee62
parentf760b87f8f12eb262f14603e65042996fe03720e
mac80211: clear subdir_stations when removing debugfs

If we don't do this, and we then fail to recreate the debugfs
directory during a mode change, then we will fail later trying
to add stations to this now bogus directory:

BUG: unable to handle kernel NULL pointer dereference at 0000006c
IP: [<c0a92202>] mutex_lock+0x12/0x30
Call Trace:
[<c0678ab4>] start_creating+0x44/0xc0
[<c0679203>] debugfs_create_dir+0x13/0xf0
[<f8a938ae>] ieee80211_sta_debugfs_add+0x6e/0x490 [mac80211]

Cc: stable@kernel.org
Signed-off-by: Tom Hughes <tom@compton.nu>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
net/mac80211/debugfs_netdev.c