From fbb1461ad1d6eacca9beb69a2f3ce1b5398d399b Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Fri, 3 Apr 2020 11:29:55 +0300
Subject: [PATCH] iwlwifi: mvm: don't call iwl_mvm_free_inactive_queue() under RCU
Git-commit: fbb1461ad1d6eacca9beb69a2f3ce1b5398d399b
Patch-mainline: v5.8-rc7
References: jsc#SLE-13430
iwl_mvm_free_inactive_queue() will sleep in synchronize_net() under
some circumstances, so don't call it under RCU. There doesn't appear
to be a need for RCU protection around this particular call.
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/iwlwifi.20200403112332.0f49448c133d.I17fd308bc4a9491859c9b112f4eb5d2c3fc18d7d@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index fee01cbbd3ac..27977992fd7f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -1189,17 +1189,15 @@ static int iwl_mvm_inactivity_check(struct iwl_mvm *mvm, u8 alloc_for_sta)
for_each_set_bit(i, &changetid_queues, IWL_MAX_HW_QUEUES)
iwl_mvm_change_queue_tid(mvm, i);
+ rcu_read_unlock();
+
if (free_queue >= 0 && alloc_for_sta != IWL_MVM_INVALID_STA) {
ret = iwl_mvm_free_inactive_queue(mvm, free_queue, queue_owner,
alloc_for_sta);
- if (ret) {
- rcu_read_unlock();
+ if (ret)
return ret;
- }
}
- rcu_read_unlock();
-
return free_queue;
}
--
2.16.4