[PATCH v2 2/4] rtl8192u: ieee80211_device: Replace semaphore wx_sem with mutex

From: Binoy Jayan
Date: Thu Jun 02 2016 - 06:54:06 EST

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The semaphore 'wx_sem' in ieee80211_device is a simple mutex,
so it should be written as one. Semaphores are going away in the future.

Signed-off-by: Binoy Jayan <binoy.jayan@xxxxxxxxxx>
---
This patch depends on the following patch:
rtl8192u: r8192_priv: Replace semaphore wx_sem with mutex

drivers/staging/rtl8192u/ieee80211/ieee80211.h | 2 +-
.../staging/rtl8192u/ieee80211/ieee80211_softmac.c | 36 +++++++++++-----------
.../rtl8192u/ieee80211/ieee80211_softmac_wx.c | 34 ++++++++++----------
drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c | 6 ++--
drivers/staging/rtl8192u/r8192U_core.c | 4 +--
5 files changed, 41 insertions(+), 41 deletions(-)

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211.h b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
index 68931e5..ef9ae22 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211.h
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211.h
@@ -1799,7 +1799,7 @@ struct ieee80211_device {
short scanning;
short proto_started;

- struct semaphore wx_sem;
+ struct mutex wx_mutex;
struct semaphore scan_sem;

spinlock_t mgmt_tx_lock;
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
index ae1274c..c983e49 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
@@ -621,7 +621,7 @@ static void ieee80211_start_scan(struct ieee80211_device *ieee)

}

-/* called with wx_sem held */
+/* called with wx_mutex held */
void ieee80211_start_scan_syncro(struct ieee80211_device *ieee)
{
if (IS_DOT11D_ENABLE(ieee) )
@@ -1389,7 +1389,7 @@ static void ieee80211_associate_procedure_wq(struct work_struct *work)
{
struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, associate_procedure_wq);
ieee->sync_scan_hurryup = 1;
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (ieee->data_hard_stop)
ieee->data_hard_stop(ieee->dev);
@@ -1402,7 +1402,7 @@ static void ieee80211_associate_procedure_wq(struct work_struct *work)
ieee->associate_seq = 1;
ieee80211_associate_step1(ieee);

- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}

inline void ieee80211_softmac_new_net(struct ieee80211_device *ieee, struct ieee80211_network *net)
@@ -2331,7 +2331,7 @@ static void ieee80211_start_ibss_wq(struct work_struct *work)
struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, start_ibss_wq);
/* iwconfig mode ad-hoc will schedule this and return
* on the other hand this will block further iwconfig SET
- * operations because of the wx_sem hold.
+ * operations because of the wx_mutex hold.
* Anyway some most set operations set a flag to speed-up
* (abort) this wq (when syncro scanning) before sleeping
* on the semaphore
@@ -2340,7 +2340,7 @@ static void ieee80211_start_ibss_wq(struct work_struct *work)
printk("==========oh driver down return\n");
return;
}
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (ieee->current_network.ssid_len == 0) {
strcpy(ieee->current_network.ssid, IEEE80211_DEFAULT_TX_ESSID);
@@ -2431,7 +2431,7 @@ static void ieee80211_start_ibss_wq(struct work_struct *work)
ieee->data_hard_resume(ieee->dev);
netif_carrier_on(ieee->dev);

- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}

inline void ieee80211_start_ibss(struct ieee80211_device *ieee)
@@ -2439,7 +2439,7 @@ inline void ieee80211_start_ibss(struct ieee80211_device *ieee)
schedule_delayed_work(&ieee->start_ibss_wq, 150);
}

-/* this is called only in user context, with wx_sem held */
+/* this is called only in user context, with wx_mutex held */
void ieee80211_start_bss(struct ieee80211_device *ieee)
{
unsigned long flags;
@@ -2505,7 +2505,7 @@ static void ieee80211_associate_retry_wq(struct work_struct *work)
struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, associate_retry_wq);
unsigned long flags;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
if(!ieee->proto_started)
goto exit;

@@ -2537,7 +2537,7 @@ static void ieee80211_associate_retry_wq(struct work_struct *work)
spin_unlock_irqrestore(&ieee->lock, flags);

exit:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}

struct sk_buff *ieee80211_get_beacon_(struct ieee80211_device *ieee)
@@ -2583,9 +2583,9 @@ EXPORT_SYMBOL(ieee80211_get_beacon);
void ieee80211_softmac_stop_protocol(struct ieee80211_device *ieee)
{
ieee->sync_scan_hurryup = 1;
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
ieee80211_stop_protocol(ieee);
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(ieee80211_softmac_stop_protocol);

@@ -2609,9 +2609,9 @@ void ieee80211_stop_protocol(struct ieee80211_device *ieee)
void ieee80211_softmac_start_protocol(struct ieee80211_device *ieee)
{
ieee->sync_scan_hurryup = 0;
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
ieee80211_start_protocol(ieee);
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}
EXPORT_SYMBOL(ieee80211_softmac_start_protocol);

@@ -2728,7 +2728,7 @@ void ieee80211_softmac_init(struct ieee80211_device *ieee)
INIT_WORK(&ieee->wx_sync_scan_wq, ieee80211_wx_sync_scan_wq);

- sema_init(&ieee->wx_sem, 1);
+ mutex_init(&ieee->wx_mutex);
sema_init(&ieee->scan_sem, 1);

spin_lock_init(&ieee->mgmt_tx_lock);
@@ -2742,14 +2742,14 @@ void ieee80211_softmac_init(struct ieee80211_device *ieee)

void ieee80211_softmac_free(struct ieee80211_device *ieee)
{
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
kfree(ieee->pDot11dInfo);
ieee->pDot11dInfo = NULL;
del_timer_sync(&ieee->associate_timer);

cancel_delayed_work(&ieee->associate_retry_wq);

- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
}

/********************************************************
@@ -3138,7 +3138,7 @@ int ieee80211_wpa_supplicant_ioctl(struct ieee80211_device *ieee, struct iw_poin
struct ieee_param *param;
int ret=0;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
//IEEE_DEBUG_INFO("wpa_supplicant: len=%d\n", p->length);

if (p->length < sizeof(struct ieee_param) || !p->pointer) {
@@ -3183,7 +3183,7 @@ int ieee80211_wpa_supplicant_ioctl(struct ieee80211_device *ieee, struct iw_poin

kfree(param);
out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);

return ret;
}
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac_wx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac_wx.c
index aad288a..21bd0dc 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac_wx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac_wx.c
@@ -34,7 +34,7 @@ int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info
int ret;
struct iw_freq *fwrq = &wrqu->freq;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (ieee->iw_mode == IW_MODE_INFRA) {
ret = -EOPNOTSUPP;
@@ -79,7 +79,7 @@ int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info

ret = 0;
out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(ieee80211_wx_set_freq);
@@ -145,7 +145,7 @@ int ieee80211_wx_set_wap(struct ieee80211_device *ieee,

ieee->sync_scan_hurryup = 1;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
/* use ifconfig hw ether */
if (ieee->iw_mode == IW_MODE_MASTER) {
ret = -1;
@@ -173,7 +173,7 @@ int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
if (ifup)
ieee80211_start_protocol(ieee);
out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(ieee80211_wx_set_wap);
@@ -274,7 +274,7 @@ int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info

ieee->sync_scan_hurryup = 1;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (wrqu->mode == ieee->iw_mode)
goto out;
@@ -293,7 +293,7 @@ int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info
}

out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return 0;
}
EXPORT_SYMBOL(ieee80211_wx_set_mode);
@@ -353,7 +353,7 @@ void ieee80211_wx_sync_scan_wq(struct work_struct *work)
ieee80211_start_send_beacons(ieee);

netif_carrier_on(ieee->dev);
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);

}

@@ -362,7 +362,7 @@ int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info
{
int ret = 0;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)) {
ret = -1;
@@ -376,7 +376,7 @@ int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info
}

out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(ieee80211_wx_set_scan);
@@ -391,7 +391,7 @@ int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
unsigned long flags;

ieee->sync_scan_hurryup = 1;
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

proto_started = ieee->proto_started;

@@ -430,7 +430,7 @@ int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
if (proto_started)
ieee80211_start_protocol(ieee);
out:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return ret;
}
EXPORT_SYMBOL(ieee80211_wx_set_essid);
@@ -453,7 +453,7 @@ int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
int enable = (parms[0] > 0);
short prev = ieee->raw_tx;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (enable)
ieee->raw_tx = 1;
@@ -475,7 +475,7 @@ int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
netif_carrier_off(ieee->dev);
}

- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);

return 0;
}
@@ -514,7 +514,7 @@ int ieee80211_wx_set_power(struct ieee80211_device *ieee,
{
int ret = 0;

- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (wrqu->power.disabled) {
ieee->ps = IEEE80211_PS_DISABLED;
@@ -553,7 +553,7 @@ int ieee80211_wx_set_power(struct ieee80211_device *ieee,

}
exit:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return ret;

}
@@ -564,7 +564,7 @@ int ieee80211_wx_get_power(struct ieee80211_device *ieee,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);

if (ieee->ps == IEEE80211_PS_DISABLED) {
wrqu->power.disabled = 1;
@@ -592,7 +592,7 @@ int ieee80211_wx_get_power(struct ieee80211_device *ieee,
wrqu->power.flags |= IW_POWER_UNICAST_R;

exit:
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
return 0;

}
diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c
index 208be5f..563d7fe 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_wx.c
@@ -253,7 +253,7 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
int i = 0;
int err = 0;
IEEE80211_DEBUG_WX("Getting scan\n");
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
spin_lock_irqsave(&ieee->lock, flags);

list_for_each_entry(network, &ieee->network_list, list) {
@@ -262,7 +262,7 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
{
err = -E2BIG;
break;
- }
+ }
if (ieee->scan_age == 0 ||
time_after(network->last_scanned + ieee->scan_age, jiffies))
ev = rtl819x_translate_scan(ieee, ev, stop, network, info);
@@ -277,7 +277,7 @@ int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
}

spin_unlock_irqrestore(&ieee->lock, flags);
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
wrqu->data.length = ev - extra;
wrqu->data.flags = 0;

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 3d1b52f..c6d3119 100644
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -3344,14 +3344,14 @@ RESET_START:

ieee->sync_scan_hurryup = 1;
if (ieee->state == IEEE80211_LINKED) {
- down(&ieee->wx_sem);
+ mutex_lock(&ieee->wx_mutex);
netdev_dbg(dev, "ieee->state is IEEE80211_LINKED\n");
ieee80211_stop_send_beacons(priv->ieee80211);
del_timer_sync(&ieee->associate_timer);
cancel_delayed_work(&ieee->associate_retry_wq);
ieee80211_stop_scan(ieee);
netif_carrier_off(dev);
- up(&ieee->wx_sem);
+ mutex_unlock(&ieee->wx_mutex);
} else {
netdev_dbg(dev, "ieee->state is NOT LINKED\n");
ieee80211_softmac_stop_protocol(priv->ieee80211);
--
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Next message: Arnd Bergmann: "Re: [PATCH v2 0/4] *** rtl8192u: Replace semaphores with mutexes ***"
Previous message: Binoy Jayan: "[PATCH v2 4/4] rtl8192u: Remove unused semaphore rf_sem"
In reply to: Binoy Jayan: "[PATCH v2 4/4] rtl8192u: Remove unused semaphore rf_sem"
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