[PATCH] bcm43xx: opencoded locking

As many people don't seem to like the locking "obfuscation"
in the bcm43xx driver, this patch removes it.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 67 insertions, 54 deletions

diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
index 5c36e29efff..ebe2a8469a7 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
@@ -56,12 +56,11 @@ static int bcm43xx_wx_get_name(struct net_device *net_dev,
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	int i;
-	unsigned long flags;
 	struct bcm43xx_phyinfo *phy;
 	char suffix[7] = { 0 };
 	int have_a = 0, have_b = 0, have_g = 0;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	for (i = 0; i < bcm->nr_80211_available; i++) {
 		phy = &(bcm->core_80211_ext[i].phy);
 		switch (phy->type) {
@@ -77,7 +76,7 @@ static int bcm43xx_wx_get_name(struct net_device *net_dev,
 			assert(0);
 		}
 	}
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	i = 0;
 	if (have_a) {
@@ -111,7 +110,9 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
 	int freq;
 	int err = -EINVAL;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
+
 	if ((data->freq.m >= 0) && (data->freq.m <= 1000)) {
 		channel = data->freq.m;
 		freq = bcm43xx_channel_to_freq(bcm, channel);
@@ -131,7 +132,8 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
 		err = 0;
 	}
 out_unlock:
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -143,11 +145,10 @@ static int bcm43xx_wx_get_channelfreq(struct net_device *net_dev,
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	struct bcm43xx_radioinfo *radio;
-	unsigned long flags;
 	int err = -ENODEV;
 	u16 channel;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	radio = bcm43xx_current_radio(bcm);
 	channel = radio->channel;
 	if (channel == 0xFF) {
@@ -162,7 +163,7 @@ static int bcm43xx_wx_get_channelfreq(struct net_device *net_dev,
 
 	err = 0;
 out_unlock:
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -180,13 +181,15 @@ static int bcm43xx_wx_set_mode(struct net_device *net_dev,
 	if (mode == IW_MODE_AUTO)
 		mode = BCM43xx_INITIAL_IWMODE;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
 		if (bcm->ieee->iw_mode != mode)
 			bcm43xx_set_iwmode(bcm, mode);
 	} else
 		bcm->ieee->iw_mode = mode;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -197,11 +200,10 @@ static int bcm43xx_wx_get_mode(struct net_device *net_dev,
 			       char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	data->mode = bcm->ieee->iw_mode;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -214,7 +216,6 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	struct iw_range *range = (struct iw_range *)extra;
 	const struct ieee80211_geo *geo;
-	unsigned long flags;
 	int i, j;
 	struct bcm43xx_phyinfo *phy;
 
@@ -254,7 +255,7 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
 			  IW_ENC_CAPA_CIPHER_TKIP |
 			  IW_ENC_CAPA_CIPHER_CCMP;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	phy = bcm43xx_current_phy(bcm);
 
 	range->num_bitrates = 0;
@@ -301,7 +302,7 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
 	}
 	range->num_frequency = j;
 
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -314,11 +315,11 @@ static int bcm43xx_wx_set_nick(struct net_device *net_dev,
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	size_t len;
 
-	bcm43xx_lock_noirq(bcm);
+	mutex_lock(&bcm->mutex);
 	len =  min((size_t)data->data.length, (size_t)IW_ESSID_MAX_SIZE);
 	memcpy(bcm->nick, extra, len);
 	bcm->nick[len] = '\0';
-	bcm43xx_unlock_noirq(bcm);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -331,12 +332,12 @@ static int bcm43xx_wx_get_nick(struct net_device *net_dev,
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	size_t len;
 
-	bcm43xx_lock_noirq(bcm);
+	mutex_lock(&bcm->mutex);
 	len = strlen(bcm->nick) + 1;
 	memcpy(extra, bcm->nick, len);
 	data->data.length = (__u16)len;
 	data->data.flags = 1;
-	bcm43xx_unlock_noirq(bcm);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -350,7 +351,8 @@ static int bcm43xx_wx_set_rts(struct net_device *net_dev,
 	unsigned long flags;
 	int err = -EINVAL;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	if (data->rts.disabled) {
 		bcm->rts_threshold = BCM43xx_MAX_RTS_THRESHOLD;
 		err = 0;
@@ -361,7 +363,8 @@ static int bcm43xx_wx_set_rts(struct net_device *net_dev,
 			err = 0;
 		}
 	}
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -372,13 +375,12 @@ static int bcm43xx_wx_get_rts(struct net_device *net_dev,
 			      char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	data->rts.value = bcm->rts_threshold;
 	data->rts.fixed = 0;
 	data->rts.disabled = (bcm->rts_threshold == BCM43xx_MAX_RTS_THRESHOLD);
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -392,7 +394,8 @@ static int bcm43xx_wx_set_frag(struct net_device *net_dev,
 	unsigned long flags;
 	int err = -EINVAL;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	if (data->frag.disabled) {
 		bcm->ieee->fts = MAX_FRAG_THRESHOLD;
 		err = 0;
@@ -403,7 +406,8 @@ static int bcm43xx_wx_set_frag(struct net_device *net_dev,
 			err = 0;
 		}
 	}
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -414,13 +418,12 @@ static int bcm43xx_wx_get_frag(struct net_device *net_dev,
 			       char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	data->frag.value = bcm->ieee->fts;
 	data->frag.fixed = 0;
 	data->frag.disabled = (bcm->ieee->fts == MAX_FRAG_THRESHOLD);
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -442,7 +445,8 @@ static int bcm43xx_wx_set_xmitpower(struct net_device *net_dev,
 		return -EOPNOTSUPP;
 	}
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
 		goto out_unlock;
 	radio = bcm43xx_current_radio(bcm);
@@ -466,7 +470,8 @@ static int bcm43xx_wx_set_xmitpower(struct net_device *net_dev,
 	err = 0;
 
 out_unlock:
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -478,10 +483,9 @@ static int bcm43xx_wx_get_xmitpower(struct net_device *net_dev,
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
 	struct bcm43xx_radioinfo *radio;
-	unsigned long flags;
 	int err = -ENODEV;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
 		goto out_unlock;
 	radio = bcm43xx_current_radio(bcm);
@@ -493,7 +497,7 @@ static int bcm43xx_wx_get_xmitpower(struct net_device *net_dev,
 
 	err = 0;
 out_unlock:
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -580,7 +584,8 @@ static int bcm43xx_wx_set_interfmode(struct net_device *net_dev,
 		return -EINVAL;
 	}
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
 		err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
 		if (err) {
@@ -595,7 +600,8 @@ static int bcm43xx_wx_set_interfmode(struct net_device *net_dev,
 		} else
 			bcm43xx_current_radio(bcm)->interfmode = mode;
 	}
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return err;
 }
@@ -606,12 +612,11 @@ static int bcm43xx_wx_get_interfmode(struct net_device *net_dev,
 				     char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 	int mode;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	mode = bcm43xx_current_radio(bcm)->interfmode;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	switch (mode) {
 	case BCM43xx_RADIO_INTERFMODE_NONE:
@@ -641,9 +646,11 @@ static int bcm43xx_wx_set_shortpreamble(struct net_device *net_dev,
 	int on;
 
 	on = *((int *)extra);
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	bcm->short_preamble = !!on;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -654,12 +661,11 @@ static int bcm43xx_wx_get_shortpreamble(struct net_device *net_dev,
 					char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 	int on;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	on = bcm->short_preamble;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	if (on)
 		strncpy(extra, "1 (Short Preamble enabled)", MAX_WX_STRING);
@@ -681,11 +687,13 @@ static int bcm43xx_wx_set_swencryption(struct net_device *net_dev,
 	
 	on = *((int *)extra);
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	bcm->ieee->host_encrypt = !!on;
 	bcm->ieee->host_decrypt = !!on;
 	bcm->ieee->host_build_iv = !on;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 
 	return 0;
 }
@@ -696,12 +704,11 @@ static int bcm43xx_wx_get_swencryption(struct net_device *net_dev,
 				       char *extra)
 {
 	struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
-	unsigned long flags;
 	int on;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
 	on = bcm->ieee->host_encrypt;
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	mutex_unlock(&bcm->mutex);
 
 	if (on)
 		strncpy(extra, "1 (SW encryption enabled) ", MAX_WX_STRING);
@@ -764,11 +771,13 @@ static int bcm43xx_wx_sprom_read(struct net_device *net_dev,
 	if (!sprom)
 		goto out;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
 	err = -ENODEV;
 	if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
 		err = bcm43xx_sprom_read(bcm, sprom);
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 	if (!err)
 		data->data.length = sprom2hex(sprom, extra);
 	kfree(sprom);
@@ -809,11 +818,15 @@ static int bcm43xx_wx_sprom_write(struct net_device *net_dev,
 	if (err)
 		goto out_kfree;
 
-	bcm43xx_lock_irqsafe(bcm, flags);
+	mutex_lock(&bcm->mutex);
+	spin_lock_irqsave(&bcm->irq_lock, flags);
+	spin_lock(&bcm->leds_lock);
 	err = -ENODEV;
 	if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
 		err = bcm43xx_sprom_write(bcm, sprom);
-	bcm43xx_unlock_irqsafe(bcm, flags);
+	spin_unlock(&bcm->leds_lock);
+	spin_unlock_irqrestore(&bcm->irq_lock, flags);
+	mutex_unlock(&bcm->mutex);
 out_kfree:
 	kfree(sprom);
 out: