From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 18 Mar 2014 09:21:02 +0000 (+0100)
Subject: iwlwifi: mvm: ignore unchanged low-latency flag
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=3510aea44ec0e5618f718c0952fe7bb0292bb2c4;p=deliverable%2Flinux.git

iwlwifi: mvm: ignore unchanged low-latency flag

If the low-latency update is called but there's no change then
ignore the update instead of triggering all the required work.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
---

diff --git a/drivers/net/wireless/iwlwifi/mvm/utils.c b/drivers/net/wireless/iwlwifi/mvm/utils.c
index c28da90cd347..d619851745a1 100644
--- a/drivers/net/wireless/iwlwifi/mvm/utils.c
+++ b/drivers/net/wireless/iwlwifi/mvm/utils.c
@@ -612,6 +612,9 @@ int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 
 	lockdep_assert_held(&mvm->mutex);
 
+	if (mvmvif->low_latency == value)
+		return 0;
+
 	mvmvif->low_latency = value;
 
 	res = iwl_mvm_update_quotas(mvm, NULL);