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[22/75] iwlwifi: mvm: Fix the keep_alive calculation

Message ID 1416839691-28533-22-git-send-email-egrumbach@gmail.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Emmanuel Grumbach Nov. 24, 2014, 2:33 p.m. UTC 
From: Avri Altman <avri.altman@intel.com>

The driver must set the keep alive period regardless of power
management state. The keep alive period must be greater or equal to
both the NIC's maximum sleep period, and the listen interval.
However, we were confusing time units (TU) and msec, so fix that.

Signed-off-by: Avri Altman <avri.altman@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
---
 drivers/net/wireless/iwlwifi/mvm/power.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/wireless/iwlwifi/mvm/power.c b/drivers/net/wireless/iwlwifi/mvm/power.c
index cb653ac..2620dd0 100644
--- a/drivers/net/wireless/iwlwifi/mvm/power.c
+++ b/drivers/net/wireless/iwlwifi/mvm/power.c
@@ -329,7 +329,7 @@  static void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm,
 				    struct ieee80211_vif *vif,
 				    struct iwl_mac_power_cmd *cmd)
 {
-	int dtimper, dtimper_msec, bi;
+	int dtimper, bi;
 	int keep_alive;
 	bool radar_detect = false;
 	struct iwl_mvm_vif *mvmvif __maybe_unused =
@@ -346,10 +346,9 @@  static void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm,
 	 * immediately after association. Check that keep alive period
 	 * is at least 3 * DTIM
 	 */
-	dtimper_msec = dtimper * bi;
-	keep_alive = max_t(int, 3 * dtimper_msec,
-			   MSEC_PER_SEC * POWER_KEEP_ALIVE_PERIOD_SEC);
-	keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
+	keep_alive = DIV_ROUND_UP(ieee80211_tu_to_usec(3 * dtimper * bi),
+				  USEC_PER_SEC);
+	keep_alive = max(keep_alive, POWER_KEEP_ALIVE_PERIOD_SEC);
 	cmd->keep_alive_seconds = cpu_to_le16(keep_alive);
 
 	if (mvm->ps_disabled)