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rtl8188eu: pwrctrl_priv: Replace semaphore 'lock' with mutex
The semaphore 'lock' in pwrctrl_priv is 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. Also, remove the now unused wrappers _init_pwrlock, _enter_pwrlock, _exit_pwrlock and _rtw_down_sema. Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
16677cca77
commit
f18c566e4e
6 changed files with 17 additions and 39 deletions
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@ -38,7 +38,7 @@ static int rtw_hw_suspend(struct adapter *padapter)
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LeaveAllPowerSaveMode(padapter);
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DBG_88E("==> rtw_hw_suspend\n");
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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pwrpriv->bips_processing = true;
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/* s1. */
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if (pnetdev) {
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@ -73,7 +73,7 @@ static int rtw_hw_suspend(struct adapter *padapter)
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pwrpriv->rf_pwrstate = rf_off;
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pwrpriv->bips_processing = false;
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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return 0;
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@ -90,12 +90,12 @@ static int rtw_hw_resume(struct adapter *padapter)
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/* system resume */
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DBG_88E("==> rtw_hw_resume\n");
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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pwrpriv->bips_processing = true;
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rtw_reset_drv_sw(padapter);
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if (pm_netdev_open(pnetdev, false) != 0) {
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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goto error_exit;
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}
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@ -113,7 +113,7 @@ static int rtw_hw_resume(struct adapter *padapter)
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pwrpriv->rf_pwrstate = rf_on;
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pwrpriv->bips_processing = false;
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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return 0;
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@ -138,7 +138,7 @@ void ips_enter(struct adapter *padapter)
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return;
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}
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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pwrpriv->bips_processing = true;
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@ -159,7 +159,7 @@ void ips_enter(struct adapter *padapter)
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}
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pwrpriv->bips_processing = false;
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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}
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int ips_leave(struct adapter *padapter)
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@ -171,7 +171,7 @@ int ips_leave(struct adapter *padapter)
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int keyid;
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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if ((pwrpriv->rf_pwrstate == rf_off) && (!pwrpriv->bips_processing)) {
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pwrpriv->bips_processing = true;
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@ -205,7 +205,7 @@ int ips_leave(struct adapter *padapter)
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pwrpriv->bpower_saving = false;
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}
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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return result;
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}
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@ -504,7 +504,7 @@ void rtw_init_pwrctrl_priv(struct adapter *padapter)
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{
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struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
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_init_pwrlock(&pwrctrlpriv->lock);
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mutex_init(&pwrctrlpriv->mutex_lock);
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pwrctrlpriv->rf_pwrstate = rf_on;
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pwrctrlpriv->ips_enter_cnts = 0;
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pwrctrlpriv->ips_leave_cnts = 0;
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@ -36,6 +36,7 @@
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#include <linux/atomic.h>
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#include <linux/io.h>
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#include <linux/semaphore.h>
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#include <linux/mutex.h>
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#include <linux/sem.h>
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#include <linux/sched.h>
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#include <linux/etherdevice.h>
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@ -78,8 +79,6 @@ u8 *_rtw_malloc(u32 sz);
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void *rtw_malloc2d(int h, int w, int size);
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u32 _rtw_down_sema(struct semaphore *sema);
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void _rtw_init_queue(struct __queue *pqueue);
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struct rtw_netdev_priv_indicator {
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@ -19,6 +19,7 @@
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#include <wlan_bssdef.h>
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#include <linux/semaphore.h>
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#include <linux/mutex.h>
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#include <linux/sem.h>
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/*
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@ -92,21 +92,6 @@ struct reportpwrstate_parm {
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unsigned short rsvd;
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};
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static inline void _init_pwrlock(struct semaphore *plock)
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{
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sema_init(plock, 1);
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}
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static inline void _enter_pwrlock(struct semaphore *plock)
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{
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_rtw_down_sema(plock);
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}
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static inline void _exit_pwrlock(struct semaphore *plock)
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{
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up(plock);
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}
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#define LPS_DELAY_TIME 1*HZ /* 1 sec */
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#define EXE_PWR_NONE 0x01
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@ -157,7 +142,7 @@ enum { /* for ips_mode */
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};
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struct pwrctrl_priv {
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struct semaphore lock;
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struct mutex mutex_lock;
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volatile u8 rpwm; /* requested power state for fw */
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volatile u8 cpwm; /* fw current power state. updated when
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* 1. read from HCPWM 2. driver lowers power level */
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@ -55,13 +55,6 @@ void *rtw_malloc2d(int h, int w, int size)
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return a;
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}
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u32 _rtw_down_sema(struct semaphore *sema)
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{
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if (down_interruptible(sema))
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return _FAIL;
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return _SUCCESS;
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}
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void _rtw_init_queue(struct __queue *pqueue)
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{
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INIT_LIST_HEAD(&(pqueue->queue));
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@ -238,7 +238,7 @@ static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
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rtw_cancel_all_timer(padapter);
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LeaveAllPowerSaveMode(padapter);
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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/* s1. */
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if (pnetdev) {
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netif_carrier_off(pnetdev);
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@ -267,7 +267,7 @@ static int rtw_suspend(struct usb_interface *pusb_intf, pm_message_t message)
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rtw_free_network_queue(padapter, true);
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rtw_dev_unload(padapter);
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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if (check_fwstate(pmlmepriv, _FW_UNDER_SURVEY))
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rtw_indicate_scan_done(padapter, 1);
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@ -298,7 +298,7 @@ static int rtw_resume_process(struct adapter *padapter)
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goto exit;
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}
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_enter_pwrlock(&pwrpriv->lock);
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mutex_lock(&pwrpriv->mutex_lock);
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rtw_reset_drv_sw(padapter);
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pwrpriv->bkeepfwalive = false;
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@ -309,7 +309,7 @@ static int rtw_resume_process(struct adapter *padapter)
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netif_device_attach(pnetdev);
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netif_carrier_on(pnetdev);
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_exit_pwrlock(&pwrpriv->lock);
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mutex_unlock(&pwrpriv->mutex_lock);
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rtw_roaming(padapter, NULL);
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