linux-kernel - [PATCH v3 1/4] staging: r8188eu: Replace semaphore cmd_queue

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Date:	Mon,  6 Jun 2016 10:43:52 +0530
From:	Binoy Jayan <binoy.jayan@...aro.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Larry Finger <Larry.Finger@...inger.net>
Cc:	Jakub Sitnicki <jsitnicki@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	driverdev-devel@...uxdriverproject.org,
	linux-kernel@...r.kernel.org, Binoy Jayan <binoy.jayan@...aro.org>
Subject: [PATCH v3 1/4] staging: r8188eu: Replace semaphore cmd_queue_sema with completion

The semaphore 'cmd_queue_sema' is used as completion,
so convert it to struct completion.

Signed-off-by: Binoy Jayan <binoy.jayan@...aro.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Larry Finger <Larry.Finger@...inger.net>
---
 drivers/staging/rtl8188eu/core/rtw_cmd.c    | 6 +++---
 drivers/staging/rtl8188eu/include/rtw_cmd.h | 2 +-
 drivers/staging/rtl8188eu/os_dep/os_intfs.c | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_cmd.c b/drivers/staging/rtl8188eu/core/rtw_cmd.c
index 7748523..a2937e7 100644
--- a/drivers/staging/rtl8188eu/core/rtw_cmd.c
+++ b/drivers/staging/rtl8188eu/core/rtw_cmd.c
@@ -27,7 +27,7 @@ No irqsave is necessary.
 
 int rtw_init_cmd_priv(struct cmd_priv *pcmdpriv)
 {
-	sema_init(&(pcmdpriv->cmd_queue_sema), 0);
+	init_completion(&pcmdpriv->cmd_queue_comp);
 	sema_init(&(pcmdpriv->terminate_cmdthread_sema), 0);
 
 	_rtw_init_queue(&(pcmdpriv->cmd_queue));
@@ -122,7 +122,7 @@ 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->cmd_queue_comp);
 
 exit:
 
@@ -167,7 +167,7 @@ int rtw_cmd_thread(void *context)
 	RT_TRACE(_module_rtl871x_cmd_c_, _drv_info_, ("start r871x rtw_cmd_thread !!!!\n"));
 
 	while (1) {
-		if (_rtw_down_sema(&pcmdpriv->cmd_queue_sema) == _FAIL)
+		if (wait_for_completion_interruptible(&pcmdpriv->cmd_queue_comp))
 			break;
 
 		if (padapter->bDriverStopped ||
diff --git a/drivers/staging/rtl8188eu/include/rtw_cmd.h b/drivers/staging/rtl8188eu/include/rtw_cmd.h
index 08ca592..3532dd1 100644
--- a/drivers/staging/rtl8188eu/include/rtw_cmd.h
+++ b/drivers/staging/rtl8188eu/include/rtw_cmd.h
@@ -39,7 +39,7 @@ struct cmd_obj {
 };
 
 struct cmd_priv {
-	struct semaphore cmd_queue_sema;
+	struct completion cmd_queue_comp;
 	struct semaphore terminate_cmdthread_sema;
 	struct __queue cmd_queue;
 	u8 cmdthd_running;
diff --git a/drivers/staging/rtl8188eu/os_dep/os_intfs.c b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
index ae2caff..a696d2b 100644
--- a/drivers/staging/rtl8188eu/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
@@ -772,7 +772,7 @@ void rtw_stop_drv_threads(struct adapter *padapter)
 	RT_TRACE(_module_os_intfs_c_, _drv_info_, ("+rtw_stop_drv_threads\n"));
 
 	/* Below is to terminate rtw_cmd_thread & event_thread... */
-	up(&padapter->cmdpriv.cmd_queue_sema);
+	complete(&padapter->cmdpriv.cmd_queue_comp);
 	if (padapter->cmdThread)
 		_rtw_down_sema(&padapter->cmdpriv.terminate_cmdthread_sema);
 
-- 
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