diff options
| author | Eliad Peller <eliad@wizery.com> | 2013-12-05 10:21:28 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-12-05 17:17:42 +0100 |
| commit | a2b70e833e189a4aefb2d3b668e3d7046dcc45c2 (patch) | |
| tree | 2bd29dfc42f74a47d4e5b48be49a8e02a90d0689 /net/mac80211/scan.c | |
| parent | mac80211: determine completed scan type by defined ops (diff) | |
| download | linux-a2b70e833e189a4aefb2d3b668e3d7046dcc45c2.tar.xz linux-a2b70e833e189a4aefb2d3b668e3d7046dcc45c2.zip | |
mac80211: start_next_roc only if scan was actually running
On scan completion we try start any pending roc.
However, if scan was just pending (and not actually started)
there is no point in trying to start the roc, as it might
have started already.
This solves the following warning:
WARNING: CPU: 0 PID: 3552 at net/mac80211/offchannel.c:269 ieee80211_start_next_roc+0x164/0x204 [mac80211]()
[<c001cd38>] (unwind_backtrace+0x0/0xf0)
[<c00181d0>] (show_stack+0x10/0x14)
[<c05c0d8c>] (dump_stack+0x78/0x94)
[<c0047c08>] (warn_slowpath_common+0x68/0x8c)
[<c0047c48>] (warn_slowpath_null+0x1c/0x24)
[<bf4d6660>] (ieee80211_start_next_roc+0x164/0x204 [mac80211])
[<bf4d5a74>] (ieee80211_scan_cancel+0xe8/0x190 [mac80211])
[<bf4df970>] (ieee80211_do_stop+0x63c/0x79c [mac80211])
[<bf4dfae0>] (ieee80211_stop+0x10/0x18 [mac80211])
[<c0504d84>] (__dev_close_many+0x84/0xcc)
[<c0504df4>] (__dev_close+0x28/0x3c)
[<c0509708>] (__dev_change_flags+0x78/0x144)
[<c0509854>] (dev_change_flags+0x10/0x48)
[<c055fe3c>] (devinet_ioctl+0x614/0x6d0)
[<c04f22a0>] (sock_ioctl+0x5c/0x2a4)
[<c0124eb4>] (do_vfs_ioctl+0x7c/0x5d8)
[<c012547c>] (SyS_ioctl+0x6c/0x7c)
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/scan.c')
| -rw-r--r-- | net/mac80211/scan.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c index 78e968a41f03..3ccb5841d50e 100644 --- a/net/mac80211/scan.c +++ b/net/mac80211/scan.c @@ -275,6 +275,7 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) { struct ieee80211_local *local = hw_to_local(hw); bool hw_scan = local->ops->hw_scan; + bool was_scanning = local->scanning; lockdep_assert_held(&local->mtx); @@ -327,7 +328,8 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) ieee80211_mlme_notify_scan_completed(local); ieee80211_ibss_notify_scan_completed(local); ieee80211_mesh_notify_scan_completed(local); - ieee80211_start_next_roc(local); + if (was_scanning) + ieee80211_start_next_roc(local); } void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) |