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| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2013-02-28 10:55:25 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2013-03-06 16:35:55 +0100 |
| commit | 8125696991194aacb1173b6e8196d19098b44e17 (patch) | |
| tree | 870dacf2225b328a8393be930128b056dfee0539 /net/mac80211/pm.c | |
| parent | 30c97120c6c7893e5c6857a16229699b2b79dfbe (diff) | |
| download | linux-8125696991194aacb1173b6e8196d19098b44e17.tar.gz linux-8125696991194aacb1173b6e8196d19098b44e17.tar.xz | |
cfg80211/mac80211: disconnect on suspend
If possible that after suspend, cfg80211 will receive request to
disconnect what require action on interface that was removed during
suspend.
Problem can manifest itself by various warnings similar to below one:
WARNING: at net/mac80211/driver-ops.h:12 ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211]()
wlan0: Failed check-sdata-in-driver check, flags: 0x4
Call Trace:
[<c043e0b3>] warn_slowpath_fmt+0x33/0x40
[<f83707c9>] ieee80211_bss_info_change_notify+0x2f9/0x300 [mac80211]
[<f83a660a>] ieee80211_recalc_ps_vif+0x2a/0x30 [mac80211]
[<f83a6706>] ieee80211_set_disassoc+0xf6/0x500 [mac80211]
[<f83a9441>] ieee80211_mgd_deauth+0x1f1/0x280 [mac80211]
[<f8381b36>] ieee80211_deauth+0x16/0x20 [mac80211]
[<f8261e70>] cfg80211_mlme_down+0x70/0xc0 [cfg80211]
[<f8264de1>] __cfg80211_disconnect+0x1b1/0x1d0 [cfg80211]
To fix the problem disconnect from any associated network before
suspend. User space is responsible to establish connection again
after resume. This basically need to be done by user space anyway,
because associated stations can go away during suspend (for example
NetworkManager disconnects on suspend and connect on resume by default).
Patch also handle situation when driver refuse to suspend with wowlan
configured and try to suspend again without it.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/pm.c')
| -rw-r--r-- | net/mac80211/pm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index d0275f34bf70..4d105c7f26b7 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -93,7 +93,7 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) return err; } else if (err > 0) { WARN_ON(err != 1); - local->wowlan = false; + return err; } else { list_for_each_entry(sdata, &local->interfaces, list) if (ieee80211_sdata_running(sdata)) |