[PATCH 2/4] wcn36xx: Change indication list lock to spinlock

Bjorn Andersson
2015-12-28T01:34:38Z

In preparation for handling incoming messages from IRQ context, change
the indication list lock to a spinlock

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
drivers/net/wireless/ath/wcn36xx/smd.c | 12 ++++++------
drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 2 +-
2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c
index 6b5dbe6f0d0a..4307429740a9 100644
--- a/drivers/net/wireless/ath/wcn36xx/smd.c
+++ b/drivers/net/wireless/ath/wcn36xx/smd.c
@@ -2165,10 +2165,10 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len)
msg_ind->msg_len = len;
memcpy(msg_ind->msg, buf, len);

- mutex_lock(&wcn->hal_ind_mutex);
+ spin_lock(&wcn->hal_ind_lock);
list_add_tail(&msg_ind->list, &wcn->hal_ind_queue);
queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work);
- mutex_unlock(&wcn->hal_ind_mutex);
+ spin_unlock(&wcn->hal_ind_lock);
wcn36xx_dbg(WCN36XX_DBG_HAL, "indication arrived\n");
break;
default:
@@ -2182,8 +2182,9 @@ static void wcn36xx_ind_smd_work(struct work_struct *work)
container_of(work, struct wcn36xx, hal_ind_work);
struct wcn36xx_hal_msg_header *msg_header;
struct wcn36xx_hal_ind_msg *hal_ind_msg;
+ unsigned long flags;

- mutex_lock(&wcn->hal_ind_mutex);
+ spin_lock_irqsave(&wcn->hal_ind_lock, flags);

hal_ind_msg = list_first_entry(&wcn->hal_ind_queue,
struct wcn36xx_hal_ind_msg,
@@ -2215,8 +2216,8 @@ static void wcn36xx_ind_smd_work(struct work_struct *work)
msg_header->msg_type);
}
list_del(wcn->hal_ind_queue.next);
+ spin_unlock_irqrestore(&wcn->hal_ind_lock, flags);
kfree(hal_ind_msg);
- mutex_unlock(&wcn->hal_ind_mutex);
}
int wcn36xx_smd_open(struct wcn36xx *wcn)
{
@@ -2229,7 +2230,7 @@ int wcn36xx_smd_open(struct wcn36xx *wcn)
}
INIT_WORK(&wcn->hal_ind_work, wcn36xx_ind_smd_work);
INIT_LIST_HEAD(&wcn->hal_ind_queue);
- mutex_init(&wcn->hal_ind_mutex);
+ spin_lock_init(&wcn->hal_ind_lock);

ret = wcn->ctrl_ops->open(wcn, wcn36xx_smd_rsp_process);
if (ret) {
@@ -2249,5 +2250,4 @@ void wcn36xx_smd_close(struct wcn36xx *wcn)
{
wcn->ctrl_ops->close();
destroy_workqueue(wcn->hal_ind_wq);
- mutex_destroy(&wcn->hal_ind_mutex);
}
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
index 7b41e833e18c..7997cc1312ee 100644
--- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h
@@ -215,7 +215,7 @@ struct wcn36xx {
struct completion hal_rsp_compl;
struct workqueue_struct *hal_ind_wq;
struct work_struct hal_ind_work;
- struct mutex hal_ind_mutex;
+ spinlock_t hal_ind_lock;
struct list_head hal_ind_queue;

/* DXE channels */
--
2.5.0