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| author | Thomas Pedersen <thomas@cozybit.com> | 2012-10-05 17:57:39 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-10-08 15:06:02 -0400 |
| commit | 55fabefe3695241e6ccfa0cd4974f3fa497693dc (patch) | |
| tree | eb6bb131022cac1457e760b1b94bc7ae25e38408 /net | |
| parent | cf193f6d2ad322cdec1872b28d761db8d22e5c00 (diff) | |
| download | lwn-55fabefe3695241e6ccfa0cd4974f3fa497693dc.tar.gz lwn-55fabefe3695241e6ccfa0cd4974f3fa497693dc.zip | |
mac80211: call drv_get_tsf() in sleepable context
The call to drv_get/set_tsf() was put on the workqueue to perform tsf
adjustments since that function might sleep. However it ended up inside
a spinlock, whose critical section must be atomic. Do tsf adjustment
outside the spinlock instead, and get rid of a warning.
Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/mesh_sync.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c index accfa00ffcdf..a16b7b4b1e02 100644 --- a/net/mac80211/mesh_sync.c +++ b/net/mac80211/mesh_sync.c @@ -56,7 +56,6 @@ void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata) u64 tsfdelta; spin_lock_bh(&ifmsh->sync_offset_lock); - if (ifmsh->sync_offset_clockdrift_max < beacon_int_fraction) { msync_dbg(sdata, "TBTT : max clockdrift=%lld; adjusting\n", (long long) ifmsh->sync_offset_clockdrift_max); @@ -69,11 +68,11 @@ void mesh_sync_adjust_tbtt(struct ieee80211_sub_if_data *sdata) tsfdelta = -beacon_int_fraction; ifmsh->sync_offset_clockdrift_max -= beacon_int_fraction; } + spin_unlock_bh(&ifmsh->sync_offset_lock); tsf = drv_get_tsf(local, sdata); if (tsf != -1ULL) drv_set_tsf(local, sdata, tsf + tsfdelta); - spin_unlock_bh(&ifmsh->sync_offset_lock); } static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, |