From: Alison Schofield <amsfield22@gmail.com>
Date: Mon, 14 Mar 2016 17:34:14 +0000 (-0700)
Subject: staging: wilc1000: replace semaphore sem_inactive_time with a completion
X-Git-Tag: v4.7-rc1~90^2~770
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e0c1496fcf6a1bbc9b827e763f58535585b249d5;p=karo-tx-linux.git

staging: wilc1000: replace semaphore sem_inactive_time with a completion

Semaphore sem_inactive_time is used to signal completion of its host
interface message. Since the thread locking this semaphore will have
to wait, completions are the preferred mechanism and will offer a
performance improvement.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Leo Kim <leo.kim@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index e73ee89cf6d4..2f14370b3ecc 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -2,6 +2,7 @@
 #include <linux/time.h>
 #include <linux/kthread.h>
 #include <linux/delay.h>
+#include <linux/completion.h>
 #include "host_interface.h"
 #include "coreconfigurator.h"
 #include "wilc_wlan.h"
@@ -1979,7 +1980,7 @@ static s32 Handle_Get_InActiveTime(struct wilc_vif *vif,
 		return -EFAULT;
 	}
 
-	up(&hif_drv->sem_inactive_time);
+	complete(&hif_drv->comp_inactive_time);
 
 	return result;
 }
@@ -3220,7 +3221,7 @@ s32 wilc_get_inactive_time(struct wilc_vif *vif, const u8 *mac,
 	if (result)
 		netdev_err(vif->ndev, "Failed to send get host ch param\n");
 
-	down(&hif_drv->sem_inactive_time);
+	wait_for_completion(&hif_drv->comp_inactive_time);
 
 	*pu32InactiveTime = inactive_time;
 
@@ -3407,7 +3408,7 @@ int wilc_init(struct net_device *dev, struct host_if_drv **hif_drv_handler)
 	sema_init(&hif_drv->sem_test_key_block, 0);
 	sema_init(&hif_drv->sem_test_disconn_block, 0);
 	sema_init(&hif_drv->sem_get_rssi, 0);
-	sema_init(&hif_drv->sem_inactive_time, 0);
+	init_completion(&hif_drv->comp_inactive_time);
 
 	if (clients_count == 0)	{
 		result = wilc_mq_create(&hif_msg_q);
diff --git a/drivers/staging/wilc1000/host_interface.h b/drivers/staging/wilc1000/host_interface.h
index 01f3222a4231..68852b3404d2 100644
--- a/drivers/staging/wilc1000/host_interface.h
+++ b/drivers/staging/wilc1000/host_interface.h
@@ -278,7 +278,7 @@ struct host_if_drv {
 	struct semaphore sem_test_key_block;
 	struct semaphore sem_test_disconn_block;
 	struct semaphore sem_get_rssi;
-	struct semaphore sem_inactive_time;
+	struct completion comp_inactive_time;
 
 	struct timer_list scan_timer;
 	struct timer_list connect_timer;