rtl8712: pwrctrl_priv: Replace semaphore lock with mutex

The semaphore 'lock' in 'pwrctrl_priv' is used as a simple mutex, so it
should be written as one. Semaphores are going away in the future.
_enter_pwrlock was using down_interruptible(), so the lock could be broken
by sending a signal. This could be a bug, because nothing checks the return
code here. Hence, using mutex_lock instead of the interruptible version.
Removing the now unused _enter_pwrlock and _down_sema.

Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 11 insertions, 11 deletions

diff --git a/drivers/staging/rtl8712/rtl871x_pwrctrl.c b/drivers/staging/rtl8712/rtl871x_pwrctrl.c
index 98a5e74..8d7ead6 100644
--- a/drivers/staging/rtl8712/rtl871x_pwrctrl.c
+++ b/drivers/staging/rtl8712/rtl871x_pwrctrl.c
@@ -103,14 +103,14 @@ void r8712_cpwm_int_hdl(struct _adapter *padapter,
 	if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80))
 		return;
 	del_timer(&padapter->pwrctrlpriv.rpwm_check_timer);
-	_enter_pwrlock(&pwrpriv->lock);
+	mutex_lock(&pwrpriv->mutex_lock);
 	pwrpriv->cpwm = (preportpwrstate->state) & 0xf;
 	if (pwrpriv->cpwm >= PS_STATE_S2) {
 		if (pwrpriv->alives & CMD_ALIVE)
 			complete(&(pcmdpriv->cmd_queue_comp));
 	}
 	pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80;
-	up(&pwrpriv->lock);
+	mutex_unlock(&pwrpriv->mutex_lock);
 }
 
 static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
@@ -141,10 +141,10 @@ static void SetPSModeWorkItemCallback(struct work_struct *work)
 	struct _adapter *padapter = container_of(pwrpriv,
 				    struct _adapter, pwrctrlpriv);
 	if (!pwrpriv->bSleep) {
-		_enter_pwrlock(&pwrpriv->lock);
+		mutex_lock(&pwrpriv->mutex_lock);
 		if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
 			r8712_set_rpwm(padapter, PS_STATE_S4);
-		up(&pwrpriv->lock);
+		mutex_lock(&pwrpriv->mutex_lock);
 	}
 }
 
@@ -155,11 +155,11 @@ static void rpwm_workitem_callback(struct work_struct *work)
 	struct _adapter *padapter = container_of(pwrpriv,
 				    struct _adapter, pwrctrlpriv);
 	if (pwrpriv->cpwm != pwrpriv->rpwm) {
-		_enter_pwrlock(&pwrpriv->lock);
+		mutex_lock(&pwrpriv->mutex_lock);
 		r8712_read8(padapter, SDIO_HCPWM);
 		pwrpriv->rpwm_retry = 1;
 		r8712_set_rpwm(padapter, pwrpriv->rpwm);
-		up(&pwrpriv->lock);
+		mutex_unlock(&pwrpriv->mutex_lock);
 	}
 }
 
@@ -175,7 +175,7 @@ void r8712_init_pwrctrl_priv(struct _adapter *padapter)
 	struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
 
 	memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv));
-	sema_init(&pwrctrlpriv->lock, 1);
+	mutex_init(&pwrctrlpriv->mutex_lock);
 	pwrctrlpriv->cpwm = PS_STATE_S4;
 	pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
 	pwrctrlpriv->smart_ps = 0;
@@ -207,13 +207,13 @@ sint r8712_register_cmd_alive(struct _adapter *padapter)
 	uint res = _SUCCESS;
 	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
 
-	_enter_pwrlock(&pwrctrl->lock);
+	mutex_lock(&pwrctrl->mutex_lock);
 	register_task_alive(pwrctrl, CMD_ALIVE);
 	if (pwrctrl->cpwm < PS_STATE_S2) {
 		r8712_set_rpwm(padapter, PS_STATE_S3);
 		res = _FAIL;
 	}
-	up(&pwrctrl->lock);
+	mutex_unlock(&pwrctrl->mutex_lock);
 	return res;
 }
 
@@ -229,7 +229,7 @@ void r8712_unregister_cmd_alive(struct _adapter *padapter)
 {
 	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
 
-	_enter_pwrlock(&pwrctrl->lock);
+	mutex_lock(&pwrctrl->mutex_lock);
 	unregister_task_alive(pwrctrl, CMD_ALIVE);
 	if ((pwrctrl->cpwm > PS_STATE_S2) &&
 	   (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) {
@@ -239,5 +239,5 @@ void r8712_unregister_cmd_alive(struct _adapter *padapter)
 			r8712_set_rpwm(padapter, PS_STATE_S0);
 		}
 	}
-	up(&pwrctrl->lock);
+	mutex_unlock(&pwrctrl->mutex_lock);
 }