[PATCH AUTOSEL 5.4 113/130] iwlwifi: mvm: disconnect if channel switch delay is too long

Sasha Levin
2020-12-23T02:56:36Z

From: Johannes Berg <johannes.berg@intel.com>

[ Upstream commit 87d9564e14cf5d05e4f1fa4eb7c55d798427f1dd ]

If the channel switch delay that we would incur after the channel
switch actually happens is longer than the quiet time we're willing
to tolerate, disconnect as well.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.3bc3449922da.Ib0255deb67b2fc21317e274adcacb545bb1dc669@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index daae86cd61140..366dc2d756bfb 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4523,6 +4523,9 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,

break;
case NL80211_IFTYPE_STATION:
+ if (chsw->delay > IWL_MAX_CSA_BLOCK_TX)
+ schedule_delayed_work(&mvmvif->csa_work, 0);
+
if (chsw->block_tx) {
/*
* In case of undetermined / long time with immediate
--
2.27.0