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* pull request: iwlwifi 2014-05-20
@ 2014-05-20 10:35 Emmanuel Grumbach
  2014-05-20 10:37 ` [PATCH] iwlwifi: mvm: don't filter out the first beacon Emmanuel Grumbach
  0 siblings, 1 reply; 6+ messages in thread
From: Emmanuel Grumbach @ 2014-05-20 10:35 UTC (permalink / raw)
  To: John Linville; +Cc: linux-wireless

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Hi John,

Here is another pull request for 3.15.

Avri fixes a disconnection issue in the power area. In certain cases, we can get the beacon only after association, and in these cases, we would begin to filter beacons out (to save power) too early. When that happened, we would disconnect.

Please pull, thanks.

The following changes since commit b538b8ce76f69f7fa225bc0817bbb361b877ea23:

  iwlwifi: mvm: prevent sched scan while not idle (2014-05-13 15:05:32 +0300)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-fixes.git for-john

for you to fetch changes up to 7340564bfacddd9cc974c714a5844e49216af190:

  iwlwifi: mvm: don't filter out the first beacon (2014-05-20 13:33:29 +0300)

----------------------------------------------------------------
Avri Altman (1):
      iwlwifi: mvm: don't filter out the first beacon

 drivers/net/wireless/iwlwifi/mvm/mac80211.c | 13 +++++++------
 drivers/net/wireless/iwlwifi/mvm/mvm.h      |  5 -----
 drivers/net/wireless/iwlwifi/mvm/power.c    | 63 ++++++++++++++++++++-------------------------------------------
 3 files changed, 27 insertions(+), 54 deletions(-)


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^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH] iwlwifi: mvm: don't filter out the first beacon
  2014-05-20 10:35 pull request: iwlwifi 2014-05-20 Emmanuel Grumbach
@ 2014-05-20 10:37 ` Emmanuel Grumbach
  2014-05-20 14:32   ` John W. Linville
  0 siblings, 1 reply; 6+ messages in thread
From: Emmanuel Grumbach @ 2014-05-20 10:37 UTC (permalink / raw)
  To: linux-wireless; +Cc: Avri Altman, Emmanuel Grumbach

From: Avri Altman <avri.altman@intel.com>

Enabling beacon filtering should be done only after a beacon
has been received. Doing that too early will cause
disconnections.
This has already been fixed, but the fix didn't take care
about the case where the beacon is received after the
association, it waited only for association which is not
enough.

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/mac80211.c | 13 +++---
 drivers/net/wireless/iwlwifi/mvm/mvm.h      |  5 ---
 drivers/net/wireless/iwlwifi/mvm/power.c    | 63 +++++++++--------------------
 3 files changed, 27 insertions(+), 54 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index b41dc84..712d460 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -1350,9 +1350,12 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 		IWL_DEBUG_MAC80211(mvm, "cqm info_changed");
 		/* reset cqm events tracking */
 		mvmvif->bf_data.last_cqm_event = 0;
-		ret = iwl_mvm_update_beacon_filter(mvm, vif, false, CMD_SYNC);
-		if (ret)
-			IWL_ERR(mvm, "failed to update CQM thresholds\n");
+		if (mvmvif->bf_data.bf_enabled) {
+			ret = iwl_mvm_enable_beacon_filter(mvm, vif, CMD_SYNC);
+			if (ret)
+				IWL_ERR(mvm,
+					"failed to update CQM thresholds\n");
+		}
 	}
 
 	if (changes & BSS_CHANGED_ARP_FILTER) {
@@ -1708,9 +1711,7 @@ static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
 	} else if (old_state == IEEE80211_STA_ASSOC &&
 		   new_state == IEEE80211_STA_AUTHORIZED) {
 		/* enable beacon filtering */
-		if (vif->bss_conf.dtim_period)
-			WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif,
-							     CMD_SYNC));
+		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, CMD_SYNC));
 		ret = 0;
 	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
 		   new_state == IEEE80211_STA_ASSOC) {
diff --git a/drivers/net/wireless/iwlwifi/mvm/mvm.h b/drivers/net/wireless/iwlwifi/mvm/mvm.h
index f1ec098..f8c376a 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/iwlwifi/mvm/mvm.h
@@ -971,11 +971,6 @@ int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
 				  u32 flags);
 int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
 				struct ieee80211_vif *vif, bool enable);
-int iwl_mvm_update_beacon_filter(struct iwl_mvm *mvm,
-				 struct ieee80211_vif *vif,
-				 bool force,
-				 u32 flags);
-
 /* SMPS */
 void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 				enum iwl_mvm_smps_type_request req_type,
diff --git a/drivers/net/wireless/iwlwifi/mvm/power.c b/drivers/net/wireless/iwlwifi/mvm/power.c
index 6b636ea..3634237 100644
--- a/drivers/net/wireless/iwlwifi/mvm/power.c
+++ b/drivers/net/wireless/iwlwifi/mvm/power.c
@@ -123,28 +123,6 @@ void iwl_mvm_beacon_filter_set_cqm_params(struct iwl_mvm *mvm,
 	cmd->ba_enable_beacon_abort = cpu_to_le32(mvmvif->bf_data.ba_enabled);
 }
 
-int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
-				struct ieee80211_vif *vif, bool enable)
-{
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-	struct iwl_beacon_filter_cmd cmd = {
-		IWL_BF_CMD_CONFIG_DEFAULTS,
-		.bf_enable_beacon_filter = cpu_to_le32(1),
-		.ba_enable_beacon_abort = cpu_to_le32(enable),
-	};
-
-	if (!mvmvif->bf_data.bf_enabled)
-		return 0;
-
-	if (mvm->cur_ucode == IWL_UCODE_WOWLAN)
-		cmd.ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_D3);
-
-	mvmvif->bf_data.ba_enabled = enable;
-	iwl_mvm_beacon_filter_set_cqm_params(mvm, vif, &cmd);
-	iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
-	return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd, CMD_SYNC);
-}
-
 static void iwl_mvm_power_log(struct iwl_mvm *mvm,
 			      struct iwl_mac_power_cmd *cmd)
 {
@@ -790,7 +768,7 @@ static int _iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	int ret;
 
-	if (mvmvif != mvm->bf_allowed_vif ||
+	if (mvmvif != mvm->bf_allowed_vif || !vif->bss_conf.dtim_period ||
 	    vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 		return 0;
 
@@ -818,6 +796,25 @@ int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 	return _iwl_mvm_enable_beacon_filter(mvm, vif, &cmd, flags, false);
 }
 
+int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
+				struct ieee80211_vif *vif, bool enable)
+{
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_beacon_filter_cmd cmd = {
+		IWL_BF_CMD_CONFIG_DEFAULTS,
+		.bf_enable_beacon_filter = cpu_to_le32(1),
+	};
+
+	if (!mvmvif->bf_data.bf_enabled)
+		return 0;
+
+	if (mvm->cur_ucode == IWL_UCODE_WOWLAN)
+		cmd.ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_D3);
+
+	mvmvif->bf_data.ba_enabled = enable;
+	return _iwl_mvm_enable_beacon_filter(mvm, vif, &cmd, 0, false);
+}
+
 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
 				  struct ieee80211_vif *vif,
 				  u32 flags)
@@ -895,26 +892,6 @@ int iwl_mvm_update_d0i3_power_mode(struct iwl_mvm *mvm,
 	return ret;
 }
 
-int iwl_mvm_update_beacon_filter(struct iwl_mvm *mvm,
-				 struct ieee80211_vif *vif,
-				 bool force,
-				 u32 flags)
-{
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-
-	if (mvmvif != mvm->bf_allowed_vif)
-		return 0;
-
-	if (!mvmvif->bf_data.bf_enabled) {
-		/* disable beacon filtering explicitly if force is true */
-		if (force)
-			return iwl_mvm_disable_beacon_filter(mvm, vif, flags);
-		return 0;
-	}
-
-	return iwl_mvm_enable_beacon_filter(mvm, vif, flags);
-}
-
 int iwl_power_legacy_set_cam_mode(struct iwl_mvm *mvm)
 {
 	struct iwl_powertable_cmd cmd = {
-- 
1.8.3.2


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* Re: [PATCH] iwlwifi: mvm: don't filter out the first beacon
  2014-05-20 10:37 ` [PATCH] iwlwifi: mvm: don't filter out the first beacon Emmanuel Grumbach
@ 2014-05-20 14:32   ` John W. Linville
  2014-05-20 15:18     ` Eliad Peller
  0 siblings, 1 reply; 6+ messages in thread
From: John W. Linville @ 2014-05-20 14:32 UTC (permalink / raw)
  To: Emmanuel Grumbach; +Cc: linux-wireless, Avri Altman, Emmanuel Grumbach

On Tue, May 20, 2014 at 01:37:18PM +0300, Emmanuel Grumbach wrote:
> From: Avri Altman <avri.altman@intel.com>
> 
> Enabling beacon filtering should be done only after a beacon
> has been received. Doing that too early will cause
> disconnections.
> This has already been fixed, but the fix didn't take care
> about the case where the beacon is received after the
> association, it waited only for association which is not
> enough.
> 
> 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/mac80211.c | 13 +++---
>  drivers/net/wireless/iwlwifi/mvm/mvm.h      |  5 ---
>  drivers/net/wireless/iwlwifi/mvm/power.c    | 63 +++++++++--------------------
>  3 files changed, 27 insertions(+), 54 deletions(-)

It is very late in the release cycle for a fix of this size.
How serious is the issue?  A random disconnect doesn't seem like a
huge problem so long as it isn't common...?

John
-- 
John W. Linville		Someday the world will need a hero, and you
linville@tuxdriver.com			might be all we have.  Be ready.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH] iwlwifi: mvm: don't filter out the first beacon
  2014-05-20 14:32   ` John W. Linville
@ 2014-05-20 15:18     ` Eliad Peller
  2014-05-20 16:38       ` Grumbach, Emmanuel
  0 siblings, 1 reply; 6+ messages in thread
From: Eliad Peller @ 2014-05-20 15:18 UTC (permalink / raw)
  To: John W. Linville
  Cc: Emmanuel Grumbach, linux-wireless, Avri Altman, Emmanuel Grumbach

On Tue, May 20, 2014 at 5:32 PM, John W. Linville
<linville@tuxdriver.com> wrote:
> On Tue, May 20, 2014 at 01:37:18PM +0300, Emmanuel Grumbach wrote:
>> From: Avri Altman <avri.altman@intel.com>
>>
>> Enabling beacon filtering should be done only after a beacon
>> has been received. Doing that too early will cause
>> disconnections.
>> This has already been fixed, but the fix didn't take care
>> about the case where the beacon is received after the
>> association, it waited only for association which is not
>> enough.
>>
>> 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/mac80211.c | 13 +++---
>>  drivers/net/wireless/iwlwifi/mvm/mvm.h      |  5 ---
>>  drivers/net/wireless/iwlwifi/mvm/power.c    | 63 +++++++++--------------------
>>  3 files changed, 27 insertions(+), 54 deletions(-)
>
> It is very late in the release cycle for a fix of this size.
> How serious is the issue?  A random disconnect doesn't seem like a
> huge problem so long as it isn't common...?
>
fwiw, it looks like you can simply workaround the issue by setting the
IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC flag.

Eliad.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* RE: [PATCH] iwlwifi: mvm: don't filter out the first beacon
  2014-05-20 15:18     ` Eliad Peller
@ 2014-05-20 16:38       ` Grumbach, Emmanuel
  2014-05-21  6:22         ` Altman, Avri
  0 siblings, 1 reply; 6+ messages in thread
From: Grumbach, Emmanuel @ 2014-05-20 16:38 UTC (permalink / raw)
  To: Eliad Peller, John W. Linville
  Cc: Emmanuel Grumbach, linux-wireless, Altman, Avri

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^ permalink raw reply	[flat|nested] 6+ messages in thread

* RE: [PATCH] iwlwifi: mvm: don't filter out the first beacon
  2014-05-20 16:38       ` Grumbach, Emmanuel
@ 2014-05-21  6:22         ` Altman, Avri
  0 siblings, 0 replies; 6+ messages in thread
From: Altman, Avri @ 2014-05-21  6:22 UTC (permalink / raw)
  To: Grumbach, Emmanuel; +Cc: Emmanuel Grumbach, linux-wireless

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^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2014-05-21  6:23 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-05-20 10:35 pull request: iwlwifi 2014-05-20 Emmanuel Grumbach
2014-05-20 10:37 ` [PATCH] iwlwifi: mvm: don't filter out the first beacon Emmanuel Grumbach
2014-05-20 14:32   ` John W. Linville
2014-05-20 15:18     ` Eliad Peller
2014-05-20 16:38       ` Grumbach, Emmanuel
2014-05-21  6:22         ` Altman, Avri

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