From: Larry Finger Date: Thu, 9 Feb 2012 01:42:03 +0000 (-0600) Subject: staging: r8712u: Simplify semaphores X-Git-Tag: v3.4-rc1~186^2~176^2~105 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86587b671bf87ed81d2d89cd1199af912402a05f;p=platform%2Fupstream%2Fkernel-adaptation-pc.git staging: r8712u: Simplify semaphores I am preparing to convert this driver from semaphore to mutex locking, The first step has been to eliminate a number of semaphores that were initialized but never used, and one whose only use was a single "up" after initialization. A total of 9 semaphores were removed in this process. One other change was to remove some inline semaphore routines that were unused. In addition, several cases had the following structure: down() if () { ... } up() The locking overhead was reduced by moving the up/down inside the if block. Signed-off-by: Larry Finger Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/rtl8712/drv_types.h b/drivers/staging/rtl8712/drv_types.h index 9b5d771..0735de9 100644 --- a/drivers/staging/rtl8712/drv_types.h +++ b/drivers/staging/rtl8712/drv_types.h @@ -138,7 +138,6 @@ struct dvobj_priv { u8 ishighspeed; uint(*inirp_init)(struct _adapter *adapter); uint(*inirp_deinit)(struct _adapter *adapter); - struct semaphore usb_suspend_sema; struct usb_device *pusbdev; }; diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c index 9a75c6d..250cd11 100644 --- a/drivers/staging/rtl8712/os_intfs.c +++ b/drivers/staging/rtl8712/os_intfs.c @@ -329,7 +329,6 @@ u8 r8712_init_drv_sw(struct _adapter *padapter) padapter->stapriv.padapter = padapter; r8712_init_bcmc_stainfo(padapter); r8712_init_pwrctrl_priv(padapter); - sema_init(&(padapter->pwrctrlpriv.pnp_pwr_mgnt_sema), 0); mp871xinit(padapter); if (init_default_value(padapter) != _SUCCESS) return _FAIL; diff --git a/drivers/staging/rtl8712/osdep_service.h b/drivers/staging/rtl8712/osdep_service.h index 1ee943a..9ba6033 100644 --- a/drivers/staging/rtl8712/osdep_service.h +++ b/drivers/staging/rtl8712/osdep_service.h @@ -72,18 +72,6 @@ static inline struct list_head *get_list_head(struct __queue *queue) #define LIST_CONTAINOR(ptr, type, member) \ ((type *)((char *)(ptr)-(SIZE_T)(&((type *)0)->member))) -static inline void _enter_hwio_critical(struct semaphore *prwlock, - unsigned long *pirqL) -{ - down(prwlock); -} - -static inline void _exit_hwio_critical(struct semaphore *prwlock, - unsigned long *pirqL) -{ - up(prwlock); -} - static inline void list_delete(struct list_head *plist) { list_del_init(plist); @@ -152,11 +140,6 @@ static inline u32 _down_sema(struct semaphore *sema) return _SUCCESS; } -static inline void _rtl_rwlock_init(struct semaphore *prwlock) -{ - sema_init(prwlock, 1); -} - static inline void _init_listhead(struct list_head *list) { INIT_LIST_HEAD(list); diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c index 6d69265..fa6dc9c 100644 --- a/drivers/staging/rtl8712/rtl8712_recv.c +++ b/drivers/staging/rtl8712/rtl8712_recv.c @@ -55,8 +55,6 @@ int r8712_init_recv_priv(struct recv_priv *precvpriv, struct _adapter *padapter) int alignment = 0; struct sk_buff *pskb = NULL; - sema_init(&precvpriv->recv_sema, 0); - sema_init(&precvpriv->terminate_recvthread_sema, 0); /*init recv_buf*/ _init_queue(&precvpriv->free_recv_buf_queue); precvpriv->pallocated_recv_buf = _malloc(NR_RECVBUFF * diff --git a/drivers/staging/rtl8712/rtl871x_io.c b/drivers/staging/rtl8712/rtl871x_io.c index ca84ee0..abc1c97 100644 --- a/drivers/staging/rtl8712/rtl871x_io.c +++ b/drivers/staging/rtl8712/rtl871x_io.c @@ -131,7 +131,6 @@ uint r8712_alloc_io_queue(struct _adapter *adapter) pio_req = (struct io_req *)(pio_queue->free_ioreqs_buf); for (i = 0; i < NUM_IOREQ; i++) { _init_listhead(&pio_req->list); - sema_init(&pio_req->sema, 0); list_insert_tail(&pio_req->list, &pio_queue->free_ioreqs); pio_req++; } diff --git a/drivers/staging/rtl8712/rtl871x_io.h b/drivers/staging/rtl8712/rtl871x_io.h index 86308a0..d3d8727 100644 --- a/drivers/staging/rtl8712/rtl871x_io.h +++ b/drivers/staging/rtl8712/rtl871x_io.h @@ -117,7 +117,6 @@ struct io_req { u32 command; u32 status; u8 *pbuf; - struct semaphore sema; void (*_async_io_callback)(struct _adapter *padater, struct io_req *pio_req, u8 *cnxt); u8 *cnxt; diff --git a/drivers/staging/rtl8712/rtl871x_pwrctrl.c b/drivers/staging/rtl8712/rtl871x_pwrctrl.c index 23e72a0..9fd2ec7 100644 --- a/drivers/staging/rtl8712/rtl871x_pwrctrl.c +++ b/drivers/staging/rtl8712/rtl871x_pwrctrl.c @@ -100,7 +100,6 @@ void r8712_cpwm_int_hdl(struct _adapter *padapter, { struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv); struct cmd_priv *pcmdpriv = &(padapter->cmdpriv); - struct xmit_priv *pxmitpriv = &(padapter->xmitpriv); if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80)) return; @@ -110,8 +109,6 @@ void r8712_cpwm_int_hdl(struct _adapter *padapter, if (pwrpriv->cpwm >= PS_STATE_S2) { if (pwrpriv->alives & CMD_ALIVE) up(&(pcmdpriv->cmd_queue_sema)); - if (pwrpriv->alives & XMIT_ALIVE) - up(&(pxmitpriv->xmit_sema)); } pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80; up(&pwrpriv->lock); @@ -145,12 +142,12 @@ static void SetPSModeWorkItemCallback(struct work_struct *work) struct pwrctrl_priv, SetPSModeWorkItem); struct _adapter *padapter = container_of(pwrpriv, struct _adapter, pwrctrlpriv); - _enter_pwrlock(&pwrpriv->lock); if (!pwrpriv->bSleep) { + _enter_pwrlock(&pwrpriv->lock); if (pwrpriv->pwr_mode == PS_MODE_ACTIVE) r8712_set_rpwm(padapter, PS_STATE_S4); + up(&pwrpriv->lock); } - up(&pwrpriv->lock); } static void rpwm_workitem_callback(struct work_struct *work) @@ -160,13 +157,13 @@ static void rpwm_workitem_callback(struct work_struct *work) struct _adapter *padapter = container_of(pwrpriv, struct _adapter, pwrctrlpriv); u8 cpwm = pwrpriv->cpwm; - _enter_pwrlock(&pwrpriv->lock); if (pwrpriv->cpwm != pwrpriv->rpwm) { + _enter_pwrlock(&pwrpriv->lock); cpwm = r8712_read8(padapter, SDIO_HCPWM); pwrpriv->rpwm_retry = 1; r8712_set_rpwm(padapter, pwrpriv->rpwm); + up(&pwrpriv->lock); } - up(&pwrpriv->lock); } static void rpwm_check_handler (void *FunctionContext) diff --git a/drivers/staging/rtl8712/rtl871x_pwrctrl.h b/drivers/staging/rtl8712/rtl871x_pwrctrl.h index b41ca28..6024c4f 100644 --- a/drivers/staging/rtl8712/rtl871x_pwrctrl.h +++ b/drivers/staging/rtl8712/rtl871x_pwrctrl.h @@ -133,7 +133,6 @@ struct pwrctrl_priv { u8 rpwm_retry; uint bSetPSModeWorkItemInProgress; - struct semaphore pnp_pwr_mgnt_sema; spinlock_t pnp_pwr_mgnt_lock; s32 pnp_current_pwr_state; u8 pnp_bstop_trx; diff --git a/drivers/staging/rtl8712/rtl871x_recv.c b/drivers/staging/rtl8712/rtl871x_recv.c index 7069f06..5b03b40 100644 --- a/drivers/staging/rtl8712/rtl871x_recv.c +++ b/drivers/staging/rtl8712/rtl871x_recv.c @@ -93,7 +93,6 @@ sint _r8712_init_recv_priv(struct recv_priv *precvpriv, precvframe++; } precvpriv->rx_pending_cnt = 1; - sema_init(&precvpriv->allrxreturnevt, 0); return r8712_init_recv_priv(precvpriv, padapter); } diff --git a/drivers/staging/rtl8712/rtl871x_recv.h b/drivers/staging/rtl8712/rtl871x_recv.h index cc7a72f..e42e6f0 100644 --- a/drivers/staging/rtl8712/rtl871x_recv.h +++ b/drivers/staging/rtl8712/rtl871x_recv.h @@ -85,8 +85,6 @@ using enter_critical section to protect */ struct recv_priv { spinlock_t lock; - struct semaphore recv_sema; - struct semaphore terminate_recvthread_sema; struct __queue free_recv_queue; struct __queue recv_pending_queue; u8 *pallocated_frame_buf; @@ -100,7 +98,6 @@ struct recv_priv { uint rx_largepacket_crcerr; uint rx_smallpacket_crcerr; uint rx_middlepacket_crcerr; - struct semaphore allrxreturnevt; u8 rx_pending_cnt; uint ff_hwaddr; struct tasklet_struct recv_tasklet; diff --git a/drivers/staging/rtl8712/rtl871x_xmit.c b/drivers/staging/rtl8712/rtl871x_xmit.c index 8bbdee7..aa57e77 100644 --- a/drivers/staging/rtl8712/rtl871x_xmit.c +++ b/drivers/staging/rtl8712/rtl871x_xmit.c @@ -71,8 +71,6 @@ sint _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv, memset((unsigned char *)pxmitpriv, 0, sizeof(struct xmit_priv)); spin_lock_init(&pxmitpriv->lock); - sema_init(&pxmitpriv->xmit_sema, 0); - sema_init(&pxmitpriv->terminate_xmitthread_sema, 0); /* Please insert all the queue initializaiton using _init_queue below */ @@ -121,7 +119,6 @@ sint _r8712_init_xmit_priv(struct xmit_priv *pxmitpriv, _r8712_init_hw_txqueue(&pxmitpriv->bmc_txqueue, BMC_QUEUE_INX); pxmitpriv->frag_len = MAX_FRAG_THRESHOLD; pxmitpriv->txirp_cnt = 1; - sema_init(&(pxmitpriv->tx_retevt), 0); /*per AC pending irp*/ pxmitpriv->beq_cnt = 0; pxmitpriv->bkq_cnt = 0; diff --git a/drivers/staging/rtl8712/rtl871x_xmit.h b/drivers/staging/rtl8712/rtl871x_xmit.h index a034c0f..638b79b 100644 --- a/drivers/staging/rtl8712/rtl871x_xmit.h +++ b/drivers/staging/rtl8712/rtl871x_xmit.h @@ -202,8 +202,6 @@ struct hw_txqueue { struct xmit_priv { spinlock_t lock; - struct semaphore xmit_sema; - struct semaphore terminate_xmitthread_sema; struct __queue be_pending; struct __queue bk_pending; struct __queue vi_pending; @@ -233,7 +231,6 @@ struct xmit_priv { uint tx_drop; struct hw_xmit *hwxmits; u8 hwxmit_entry; - struct semaphore tx_retevt;/*all tx return event;*/ u8 txirp_cnt; struct tasklet_struct xmit_tasklet; _workitem xmit_pipe4_reset_wi; diff --git a/drivers/staging/rtl8712/usb_intf.c b/drivers/staging/rtl8712/usb_intf.c index 5385da2..01378ea 100644 --- a/drivers/staging/rtl8712/usb_intf.c +++ b/drivers/staging/rtl8712/usb_intf.c @@ -280,7 +280,6 @@ static uint r8712_usb_dvobj_init(struct _adapter *padapter) } if ((r8712_alloc_io_queue(padapter)) == _FAIL) status = _FAIL; - sema_init(&(padapter->dvobjpriv.usb_suspend_sema), 0); return status; }