[PATCH 6/7] staging: wilc1000: message_queue: Replace semaphore sem with completion

[Binoy Jayan]

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

Signed-off-by: Binoy Jayan <binoy.ja...@linaro.org>
---
 drivers/staging/wilc1000/wilc_msgqueue.c | 13 +++++++------
 drivers/staging/wilc1000/wilc_msgqueue.h |  4 ++--
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/wilc1000/wilc_msgqueue.c 
b/drivers/staging/wilc1000/wilc_msgqueue.c
index 6cb894e..80c9631 100644
--- a/drivers/staging/wilc1000/wilc_msgqueue.c
+++ b/drivers/staging/wilc1000/wilc_msgqueue.c
@@ -3,6 +3,7 @@
 #include <linux/spinlock.h>
 #include <linux/errno.h>
 #include <linux/slab.h>
+#include <linux/completion.h>
 
 /*!
  *  @author            syounan
@@ -13,7 +14,7 @@
 int wilc_mq_create(struct message_queue *mq)
 {
        spin_lock_init(&mq->lock);
-       sema_init(&mq->sem, 0);
+       init_completion(&mq->comp);
        INIT_LIST_HEAD(&mq->msg_list);
        mq->recv_count = 0;
        mq->exiting = false;
@@ -34,7 +35,7 @@ int wilc_mq_destroy(struct message_queue *mq)
 
        /* Release any waiting receiver thread. */
        while (mq->recv_count > 0) {
-               up(&mq->sem);
+               complete(&mq->comp);
                mq->recv_count--;
        }
 
@@ -85,7 +86,7 @@ int wilc_mq_send(struct message_queue *mq,
 
        spin_unlock_irqrestore(&mq->lock, flags);
 
-       up(&mq->sem);
+       complete(&mq->comp);
 
        return 0;
 }
@@ -112,19 +113,19 @@ int wilc_mq_recv(struct message_queue *mq,
        mq->recv_count++;
        spin_unlock_irqrestore(&mq->lock, flags);
 
-       down(&mq->sem);
+       wait_for_completion(&mq->comp);
        spin_lock_irqsave(&mq->lock, flags);
 
        if (list_empty(&mq->msg_list)) {
                spin_unlock_irqrestore(&mq->lock, flags);
-               up(&mq->sem);
+               complete(&mq->comp);
                return -EFAULT;
        }
        /* check buffer size */
        msg = list_first_entry(&mq->msg_list, struct message, list);
        if (recv_buf_size < msg->len) {
                spin_unlock_irqrestore(&mq->lock, flags);
-               up(&mq->sem);
+               complete(&mq->comp);
                return -EOVERFLOW;
        }
 
diff --git a/drivers/staging/wilc1000/wilc_msgqueue.h 
b/drivers/staging/wilc1000/wilc_msgqueue.h
index 846a484..a7a2e55 100644
--- a/drivers/staging/wilc1000/wilc_msgqueue.h
+++ b/drivers/staging/wilc1000/wilc_msgqueue.h
@@ -1,7 +1,7 @@
 #ifndef __WILC_MSG_QUEUE_H__
 #define __WILC_MSG_QUEUE_H__
 
-#include <linux/semaphore.h>
+#include <linux/completion.h>
 #include <linux/list.h>
 
 struct message {
@@ -11,7 +11,7 @@ struct message {
 };
 
 struct message_queue {
-       struct semaphore sem;
+       struct completion comp;
        spinlock_t lock;
        bool exiting;
        u32 recv_count;
-- 
2.7.4

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