[PATCH 1/7] staging: wilc1000: Replace semaphore txq_event with completion

From: Binoy Jayan
Date: Mon Jun 13 2016 - 06:38:13 EST


The semaphore 'txq_event' is used as completion, so convert it
to a struct completion type.

Signed-off-by: Binoy Jayan <binoy.jayan@xxxxxxxxxx>
---
drivers/staging/wilc1000/linux_wlan.c | 8 ++++----
drivers/staging/wilc1000/wilc_wfi_netdevice.h | 3 ++-
drivers/staging/wilc1000/wilc_wlan.c | 8 +++++---
3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c
index 4f93c11..90f906d 100644
--- a/drivers/staging/wilc1000/linux_wlan.c
+++ b/drivers/staging/wilc1000/linux_wlan.c
@@ -316,7 +316,7 @@ static int linux_wlan_txq_task(void *vp)

complete(&wl->txq_thread_started);
while (1) {
- down(&wl->txq_event);
+ wait_for_completion(&wl->txq_event);

if (wl->close) {
complete(&wl->txq_thread_started);
@@ -650,7 +650,7 @@ void wilc1000_wlan_deinit(struct net_device *dev)
mutex_unlock(&wl->hif_cs);
}
if (&wl->txq_event)
- up(&wl->txq_event);
+ wait_for_completion(&wl->txq_event);

wlan_deinitialize_threads(dev);
deinit_irq(dev);
@@ -681,7 +681,7 @@ static int wlan_init_locks(struct net_device *dev)
spin_lock_init(&wl->txq_spinlock);
sema_init(&wl->txq_add_to_head_cs, 1);

- sema_init(&wl->txq_event, 0);
+ init_completion(&wl->txq_event);

sema_init(&wl->cfg_event, 0);
sema_init(&wl->sync_event, 0);
@@ -738,7 +738,7 @@ static void wlan_deinitialize_threads(struct net_device *dev)
wl->close = 1;

if (&wl->txq_event)
- up(&wl->txq_event);
+ complete(&wl->txq_event);

if (wl->txq_thread) {
kthread_stop(wl->txq_thread);
diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
index 3a561df6..12d7c7b 100644
--- a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
+++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
@@ -42,6 +42,7 @@
#include "host_interface.h"
#include "wilc_wlan.h"
#include <linux/wireless.h>
+#include <linux/completion.h>

#define FLOW_CONTROL_LOWER_THRESHOLD 128
#define FLOW_CONTROL_UPPER_THRESHOLD 256
@@ -178,7 +179,7 @@ struct wilc {

struct semaphore cfg_event;
struct semaphore sync_event;
- struct semaphore txq_event;
+ struct completion txq_event;
struct completion txq_thread_started;

struct task_struct *txq_thread;
diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c
index 11e16d5..1a57135 100644
--- a/drivers/staging/wilc1000/wilc_wlan.c
+++ b/drivers/staging/wilc1000/wilc_wlan.c
@@ -1,3 +1,4 @@
+#include <linux/completion.h>
#include "wilc_wlan_if.h"
#include "wilc_wlan.h"
#include "wilc_wfi_netdevice.h"
@@ -89,7 +90,7 @@ static void wilc_wlan_txq_add_to_tail(struct net_device *dev,

spin_unlock_irqrestore(&wilc->txq_spinlock, flags);

- up(&wilc->txq_event);
+ complete(&wilc->txq_event);
}

static int wilc_wlan_txq_add_to_head(struct wilc_vif *vif,
@@ -119,7 +120,7 @@ static int wilc_wlan_txq_add_to_head(struct wilc_vif *vif,

spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
up(&wilc->txq_add_to_head_cs);
- up(&wilc->txq_event);
+ complete(&wilc->txq_event);

return 0;
}
@@ -287,7 +288,8 @@ static int wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
spin_unlock_irqrestore(&wilc->txq_spinlock, wilc->txq_spinlock_flags);

while (dropped > 0) {
- wilc_lock_timeout(wilc, &wilc->txq_event, 1);
+ wait_for_completion_timeout(&wilc->txq_event,
+ msecs_to_jiffies(1));
dropped--;
}

--
2.7.4