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path: root/drivers/staging/wilc1000/wilc_msgqueue.c
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Diffstat (limited to 'drivers/staging/wilc1000/wilc_msgqueue.c')
-rw-r--r--drivers/staging/wilc1000/wilc_msgqueue.c144
1 files changed, 0 insertions, 144 deletions
diff --git a/drivers/staging/wilc1000/wilc_msgqueue.c b/drivers/staging/wilc1000/wilc_msgqueue.c
deleted file mode 100644
index 6cb894e58..000000000
--- a/drivers/staging/wilc1000/wilc_msgqueue.c
+++ /dev/null
@@ -1,144 +0,0 @@
-
-#include "wilc_msgqueue.h"
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-
-/*!
- * @author syounan
- * @date 1 Sep 2010
- * @note copied from FLO glue implementatuion
- * @version 1.0
- */
-int wilc_mq_create(struct message_queue *mq)
-{
- spin_lock_init(&mq->lock);
- sema_init(&mq->sem, 0);
- INIT_LIST_HEAD(&mq->msg_list);
- mq->recv_count = 0;
- mq->exiting = false;
- return 0;
-}
-
-/*!
- * @author syounan
- * @date 1 Sep 2010
- * @note copied from FLO glue implementatuion
- * @version 1.0
- */
-int wilc_mq_destroy(struct message_queue *mq)
-{
- struct message *msg;
-
- mq->exiting = true;
-
- /* Release any waiting receiver thread. */
- while (mq->recv_count > 0) {
- up(&mq->sem);
- mq->recv_count--;
- }
-
- while (!list_empty(&mq->msg_list)) {
- msg = list_first_entry(&mq->msg_list, struct message, list);
- list_del(&msg->list);
- kfree(msg->buf);
- }
-
- return 0;
-}
-
-/*!
- * @author syounan
- * @date 1 Sep 2010
- * @note copied from FLO glue implementatuion
- * @version 1.0
- */
-int wilc_mq_send(struct message_queue *mq,
- const void *send_buf, u32 send_buf_size)
-{
- unsigned long flags;
- struct message *new_msg = NULL;
-
- if (!mq || (send_buf_size == 0) || !send_buf)
- return -EINVAL;
-
- if (mq->exiting)
- return -EFAULT;
-
- /* construct a new message */
- new_msg = kmalloc(sizeof(*new_msg), GFP_ATOMIC);
- if (!new_msg)
- return -ENOMEM;
-
- new_msg->len = send_buf_size;
- INIT_LIST_HEAD(&new_msg->list);
- new_msg->buf = kmemdup(send_buf, send_buf_size, GFP_ATOMIC);
- if (!new_msg->buf) {
- kfree(new_msg);
- return -ENOMEM;
- }
-
- spin_lock_irqsave(&mq->lock, flags);
-
- /* add it to the message queue */
- list_add_tail(&new_msg->list, &mq->msg_list);
-
- spin_unlock_irqrestore(&mq->lock, flags);
-
- up(&mq->sem);
-
- return 0;
-}
-
-/*!
- * @author syounan
- * @date 1 Sep 2010
- * @note copied from FLO glue implementatuion
- * @version 1.0
- */
-int wilc_mq_recv(struct message_queue *mq,
- void *recv_buf, u32 recv_buf_size, u32 *recv_len)
-{
- struct message *msg;
- unsigned long flags;
-
- if (!mq || (recv_buf_size == 0) || !recv_buf || !recv_len)
- return -EINVAL;
-
- if (mq->exiting)
- return -EFAULT;
-
- spin_lock_irqsave(&mq->lock, flags);
- mq->recv_count++;
- spin_unlock_irqrestore(&mq->lock, flags);
-
- down(&mq->sem);
- spin_lock_irqsave(&mq->lock, flags);
-
- if (list_empty(&mq->msg_list)) {
- spin_unlock_irqrestore(&mq->lock, flags);
- up(&mq->sem);
- 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);
- return -EOVERFLOW;
- }
-
- /* consume the message */
- mq->recv_count--;
- memcpy(recv_buf, msg->buf, msg->len);
- *recv_len = msg->len;
-
- list_del(&msg->list);
-
- kfree(msg->buf);
- kfree(msg);
-
- spin_unlock_irqrestore(&mq->lock, flags);
-
- return 0;
-}