[PATCH] bcm43xx: split the channel helper functions, so that they can be used without a valid running core.

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

3 files changed, 59 insertions, 37 deletions

diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c
index b4767e42e8f4..6195c2a1516d 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c
@@ -1169,7 +1169,7 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm)
         if (have_a) {
                 for (i = 0, channel = 0; channel < 201; channel++) {
                         chan = &geo.a[i++];
-                        chan->freq = bcm43xx_channel_to_freq(bcm, channel);
+                        chan->freq = bcm43xx_channel_to_freq_a(channel);
                         chan->channel = channel;
                 }
                 geo.a_channels = i;
@@ -1177,7 +1177,7 @@ static void bcm43xx_geo_init(struct bcm43xx_private *bcm)
         if (have_bg) {
                 for (i = 0, channel = 1; channel < 15; channel++) {
                         chan = &geo.bg[i++];
-                        chan->freq = bcm43xx_channel_to_freq(bcm, channel);
+                        chan->freq = bcm43xx_channel_to_freq_bg(channel);
                         chan->channel = channel;
                 }
                 geo.bg_channels = i;
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.h b/drivers/net/wireless/bcm43xx/bcm43xx_main.h
index 0a22e833915d..7d696d257f7a 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_main.h
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.h
@@ -187,58 +187,78 @@ struct bcm43xx_xmitstatus_queue {
 
 /* Lightweight function to convert a frequency (in Mhz) to a channel number. */
 static inline
-u8 bcm43xx_freq_to_channel(struct bcm43xx_private *bcm,
-                           int freq)
+u8 bcm43xx_freq_to_channel_a(int freq)
+{
+        return ((freq - 5000) / 5);
+}
+static inline
+u8 bcm43xx_freq_to_channel_bg(int freq)
 {
         u8 channel;
 
-        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) {
-                channel = (freq - 5000) / 5;
-        } else {
-                if (freq == 2484)
-                        channel = 14;
-                else
-                        channel = (freq - 2407) / 5;
-        }
+        if (freq == 2484)
+                channel = 14;
+        else
+                channel = (freq - 2407) / 5;
 
         return channel;
 }
+static inline
+u8 bcm43xx_freq_to_channel(struct bcm43xx_private *bcm,
+                           int freq)
+{
+        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A)
+                return bcm43xx_freq_to_channel_a(freq);
+        return bcm43xx_freq_to_channel_bg(freq);
+}
 
 /* Lightweight function to convert a channel number to a frequency (in Mhz). */
 static inline
-int bcm43xx_channel_to_freq(struct bcm43xx_private *bcm,
-                            u8 channel)
+int bcm43xx_channel_to_freq_a(u8 channel)
+{
+        return (5000 + (5 * channel));
+}
+static inline
+int bcm43xx_channel_to_freq_bg(u8 channel)
 {
         int freq;
 
-        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) {
-                freq = 5000 + (5 * channel);
-        } else {
-                if (channel == 14)
-                        freq = 2484;
-                else
-                        freq = 2407 + (5 * channel);
-        }
+        if (channel == 14)
+                freq = 2484;
+        else
+                freq = 2407 + (5 * channel);
 
         return freq;
 }
+static inline
+int bcm43xx_channel_to_freq(struct bcm43xx_private *bcm,
+                            u8 channel)
+{
+        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A)
+                return bcm43xx_channel_to_freq_a(channel);
+        return bcm43xx_channel_to_freq_bg(channel);
+}
 
 /* Lightweight function to check if a channel number is valid.
  * Note that this does _NOT_ check for geographical restrictions!
  */
 static inline
+int bcm43xx_is_valid_channel_a(u8 channel)
+{
+        return (channel <= 200);
+}
+static inline
+int bcm43xx_is_valid_channel_bg(u8 channel)
+{
+        return (channel >= 1 && channel <= 14);
+}
+static inline
 int bcm43xx_is_valid_channel(struct bcm43xx_private *bcm,
-                            u8 channel)
+                             u8 channel)
 {
-        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A) {
-                if (channel <= 200)
-                        return 1;
-        } else {
-                if (channel >= 1 && channel <= 14)
-                        return 1;
-        }
-
-        return 0;
+        if (bcm->current_core->phy->type == BCM43xx_PHYTYPE_A)
+                return bcm43xx_is_valid_channel_a(channel);
+        return bcm43xx_is_valid_channel_bg(channel);
 }
 
 void bcm43xx_tsf_read(struct bcm43xx_private *bcm, u64 *tsf);
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
index df37d28996c9..aa2d9930c436 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_wx.c
@@ -111,8 +111,9 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
         unsigned long flags;
         u8 channel;
         int freq;
-        int err = 0;
+        int err = -EINVAL;
 
+        spin_lock_irqsave(&bcm->lock, flags);
         if ((data->freq.m >= 0) && (data->freq.m <= 1000)) {
                 channel = data->freq.m;
                 freq = bcm43xx_channel_to_freq(bcm, channel);
@@ -121,16 +122,17 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
                 freq = data->freq.m;
         }
         if (!bcm43xx_is_valid_channel(bcm, channel))
-                return -EINVAL;
-
-        spin_lock_irqsave(&bcm->lock, flags);
+                goto out_unlock;
         if (bcm->initialized) {
                 //ieee80211softmac_disassoc(softmac, $REASON);
                 bcm43xx_mac_suspend(bcm);
                 err = bcm43xx_radio_selectchannel(bcm, channel, 0);
                 bcm43xx_mac_enable(bcm);
-        } else
+        } else {
                 bcm->current_core->radio->initial_channel = channel;
+                err = 0;
+        }
+out_unlock:
         spin_unlock_irqrestore(&bcm->lock, flags);
 
         return err;