rtw_enqueue_cmd() uses a semaphore to notify rtw_cmd_thread() that it
has enqueued commands. rtw_cmd_thread() "down(s)" in interruptible mode
to wait to be notified.
Use completion variables because they are better suited for the purpose.
In rtw_cmd_thread(), wait in uninterruptible mode, even if the original
code uses down_interruptible(), because the interruption of
rtw_cmd_thread() is not allowed and unwanted.
Tested with "ASUSTek Computer, Inc. Realtek 8188EUS [USB-N10 Nano]".
Acked-by: Phillip Potter <phil@xxxxxxxxxxxxxxxx>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@xxxxxxxxx>
---
drivers/staging/r8188eu/core/rtw_cmd.c | 7 +++----
drivers/staging/r8188eu/include/rtw_cmd.h | 2 +-
drivers/staging/r8188eu/os_dep/os_intfs.c | 2 +-
3 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/r8188eu/core/rtw_cmd.c b/drivers/staging/r8188eu/core/rtw_cmd.c
index bdf0d0160070..3b07328704bb 100644
--- a/drivers/staging/r8188eu/core/rtw_cmd.c
+++ b/drivers/staging/r8188eu/core/rtw_cmd.c
@@ -21,7 +21,7 @@ static int _rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
{
int res = _SUCCESS;
- sema_init(&pcmdpriv->cmd_queue_sema, 0);
+ init_completion(&pcmdpriv->enqueue_cmd);
/* sema_init(&(pcmdpriv->cmd_done_sema), 0); */
init_completion(&pcmdpriv->start_cmd_thread);
init_completion(&pcmdpriv->stop_cmd_thread);
@@ -198,7 +198,7 @@ u32 rtw_enqueue_cmd(struct cmd_priv *pcmdpriv, struct cmd_obj *cmd_obj)
res = _rtw_enqueue_cmd(&pcmdpriv->cmd_queue, cmd_obj);
if (res == _SUCCESS)
- up(&pcmdpriv->cmd_queue_sema);
+ complete(&pcmdpriv->enqueue_cmd);
exit:
@@ -250,8 +250,7 @@ int rtw_cmd_thread(void *context)
complete(&pcmdpriv->start_cmd_thread);
while (1) {
- if (_rtw_down_sema(&pcmdpriv->cmd_queue_sema) == _FAIL)
- break;
+ wait_for_completion(&pcmdpriv->enqueue_cmd);
if (padapter->bDriverStopped ||
padapter->bSurpriseRemoved) {
diff --git a/drivers/staging/r8188eu/include/rtw_cmd.h b/drivers/staging/r8188eu/include/rtw_cmd.h
index b6266e3e2c40..47c3c80cc24a 100644
--- a/drivers/staging/r8188eu/include/rtw_cmd.h
+++ b/drivers/staging/r8188eu/include/rtw_cmd.h
@@ -33,7 +33,7 @@ struct cmd_obj {
};
struct cmd_priv {
- struct semaphore cmd_queue_sema;
+ struct completion enqueue_cmd;
struct completion start_cmd_thread;
struct completion stop_cmd_thread;
struct __queue cmd_queue;
diff --git a/drivers/staging/r8188eu/os_dep/os_intfs.c b/drivers/staging/r8188eu/os_dep/os_intfs.c
index 0bcea66f550b..96e9897085fe 100644
--- a/drivers/staging/r8188eu/os_dep/os_intfs.c
+++ b/drivers/staging/r8188eu/os_dep/os_intfs.c
@@ -394,7 +394,7 @@ u32 rtw_start_drv_threads(struct adapter *padapter)
void rtw_stop_drv_threads(struct adapter *padapter)
{
/* Below is to termindate rtw_cmd_thread & event_thread... */
- up(&padapter->cmdpriv.cmd_queue_sema);
+ complete(&padapter->cmdpriv.enqueue_cmd);
if (padapter->cmdThread)
/* wait for rtw_cmd_thread() to stop running */
wait_for_completion(&padapter->cmdpriv.stop_cmd_thread);
--
2.33.0
