From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 26 Aug 2010 11:30:27 +0000 (+0200)
Subject: wl12xx: remove unneeded locking
X-Git-Tag: v3.12-rc1~8399^2~265^2^2~207
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0ec2f2724d7e457b91e5983d11db8adba9aad47e;p=kernel%2Fkernel-generic.git

wl12xx: remove unneeded locking

With the scan callback now being callable from
any context, these unlocks/locks can go away.
This makes the code easier to understand, since
callers of these functions must no longer be
aware that the mutex may be dropped.

As Stanislaw is working on iwlwifi scanning, I
didn't change it to take advantage of the new
mac80211 semantics.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/wl12xx/wl1251_event.c b/drivers/net/wireless/wl12xx/wl1251_event.c
index 00c3e64..5422355 100644
--- a/drivers/net/wireless/wl12xx/wl1251_event.c
+++ b/drivers/net/wireless/wl12xx/wl1251_event.c
@@ -34,9 +34,7 @@ static int wl1251_event_scan_complete(struct wl1251 *wl,
 		     mbox->scheduled_scan_channels);
 
 	if (wl->scanning) {
-		mutex_unlock(&wl->mutex);
 		ieee80211_scan_completed(wl->hw, false);
-		mutex_lock(&wl->mutex);
 		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
 		wl->scanning = false;
 	}
diff --git a/drivers/net/wireless/wl12xx/wl1251_main.c b/drivers/net/wireless/wl12xx/wl1251_main.c
index edd4845..f9d9ad6 100644
--- a/drivers/net/wireless/wl12xx/wl1251_main.c
+++ b/drivers/net/wireless/wl12xx/wl1251_main.c
@@ -467,9 +467,7 @@ static void wl1251_op_stop(struct ieee80211_hw *hw)
 	WARN_ON(wl->state != WL1251_STATE_ON);
 
 	if (wl->scanning) {
-		mutex_unlock(&wl->mutex);
 		ieee80211_scan_completed(wl->hw, true);
-		mutex_lock(&wl->mutex);
 		wl->scanning = false;
 	}
 
diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c
index 30194c0..8e55cf8 100644
--- a/drivers/net/wireless/wl12xx/wl1271_main.c
+++ b/drivers/net/wireless/wl12xx/wl1271_main.c
@@ -948,9 +948,7 @@ static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
 		ieee80211_enable_dyn_ps(wl->vif);
 
 	if (wl->scan.state != WL1271_SCAN_STATE_IDLE) {
-		mutex_unlock(&wl->mutex);
 		ieee80211_scan_completed(wl->hw, true);
-		mutex_lock(&wl->mutex);
 		wl->scan.state = WL1271_SCAN_STATE_IDLE;
 		kfree(wl->scan.scanned_ch);
 		wl->scan.scanned_ch = NULL;
diff --git a/drivers/net/wireless/wl12xx/wl1271_scan.c b/drivers/net/wireless/wl12xx/wl1271_scan.c
index fec43ee..9c80ba9 100644
--- a/drivers/net/wireless/wl12xx/wl1271_scan.c
+++ b/drivers/net/wireless/wl12xx/wl1271_scan.c
@@ -215,9 +215,7 @@ void wl1271_scan_stm(struct wl1271 *wl)
 		break;
 
 	case WL1271_SCAN_STATE_DONE:
-		mutex_unlock(&wl->mutex);
 		ieee80211_scan_completed(wl->hw, false);
-		mutex_lock(&wl->mutex);
 
 		kfree(wl->scan.scanned_ch);
 		wl->scan.scanned_ch = NULL;