hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

mac80211: catch queue stop underflow 

If some code stops the queues more times than having started
(for when refcounting is used), warn on and reset the counter
to 0 to avoid blocking forever.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-11-24 15:29:53 +01:00
parent 63b4d8b373
commit 856142cdaa
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
net/mac80211/util.c
View File

@ -288,10 +288,13 @@ static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
if (!test_bit(reason, &local->queue_stop_reasons[queue]))
return;
if (!refcounted)
if (!refcounted) {
local->q_stop_reasons[queue][reason] = 0;
else
} else {
local->q_stop_reasons[queue][reason]--;
if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
local->q_stop_reasons[queue][reason] = 0;
}
if (local->q_stop_reasons[queue][reason] == 0)
__clear_bit(reason, &local->queue_stop_reasons[queue]);