b43: Fix some MAC locking
This fixes some locking w.r.t. the lower MAC (firmware).
It also removes a lot of ancient IRQ-locking that's not needed anymore.
We simply suspend the MAC. That's easier and causes less trouble.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index ba7a5ab..07dc988 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -3324,7 +3324,6 @@
unsigned long flags;
int antenna;
int err = 0;
- u32 savedirqs;
mutex_lock(&wl->mutex);
@@ -3335,24 +3334,14 @@
dev = wl->current_dev;
phy = &dev->phy;
+ b43_mac_suspend(dev);
+
if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
b43_set_retry_limits(dev, conf->short_frame_max_tx_count,
conf->long_frame_max_tx_count);
changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
if (!changed)
- goto out_unlock_mutex;
-
- /* Disable IRQs while reconfiguring the device.
- * This makes it possible to drop the spinlock throughout
- * the reconfiguration process. */
- spin_lock_irqsave(&wl->irq_lock, flags);
- if (b43_status(dev) < B43_STAT_STARTED) {
- spin_unlock_irqrestore(&wl->irq_lock, flags);
- goto out_unlock_mutex;
- }
- savedirqs = b43_interrupt_disable(dev, B43_IRQ_ALL);
- spin_unlock_irqrestore(&wl->irq_lock, flags);
- b43_synchronize_irq(dev);
+ goto out_mac_enable;
/* Switch to the requested channel.
* The firmware takes care of races with the TX handler. */
@@ -3399,11 +3388,9 @@
}
}
- spin_lock_irqsave(&wl->irq_lock, flags);
- b43_interrupt_enable(dev, savedirqs);
- mmiowb();
- spin_unlock_irqrestore(&wl->irq_lock, flags);
- out_unlock_mutex:
+out_mac_enable:
+ b43_mac_enable(dev);
+out_unlock_mutex:
mutex_unlock(&wl->mutex);
return err;
@@ -3461,27 +3448,12 @@
{
struct b43_wl *wl = hw_to_b43_wl(hw);
struct b43_wldev *dev;
- struct b43_phy *phy;
- unsigned long flags;
- u32 savedirqs;
mutex_lock(&wl->mutex);
dev = wl->current_dev;
- phy = &dev->phy;
-
- /* Disable IRQs while reconfiguring the device.
- * This makes it possible to drop the spinlock throughout
- * the reconfiguration process. */
- spin_lock_irqsave(&wl->irq_lock, flags);
- if (b43_status(dev) < B43_STAT_STARTED) {
- spin_unlock_irqrestore(&wl->irq_lock, flags);
+ if (!dev || b43_status(dev) < B43_STAT_STARTED)
goto out_unlock_mutex;
- }
- savedirqs = b43_interrupt_disable(dev, B43_IRQ_ALL);
- spin_unlock_irqrestore(&wl->irq_lock, flags);
- b43_synchronize_irq(dev);
-
b43_mac_suspend(dev);
if (changed & BSS_CHANGED_BASIC_RATES)
@@ -3495,13 +3467,7 @@
}
b43_mac_enable(dev);
-
- spin_lock_irqsave(&wl->irq_lock, flags);
- b43_interrupt_enable(dev, savedirqs);
- /* XXX: why? */
- mmiowb();
- spin_unlock_irqrestore(&wl->irq_lock, flags);
- out_unlock_mutex:
+out_unlock_mutex:
mutex_unlock(&wl->mutex);
return;
diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index af37abc..2ebfc7d 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -178,13 +178,27 @@
b43_power_saving_ctl_bits(dev, 0);
}
+static inline void assert_mac_suspended(struct b43_wldev *dev)
+{
+ if (!B43_DEBUG)
+ return;
+ if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
+ (dev->mac_suspended <= 0)) {
+ b43dbg(dev->wl, "PHY/RADIO register access with "
+ "enabled MAC.\n");
+ dump_stack();
+ }
+}
+
u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
{
+ assert_mac_suspended(dev);
return dev->phy.ops->radio_read(dev, reg);
}
void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
{
+ assert_mac_suspended(dev);
dev->phy.ops->radio_write(dev, reg, value);
}
@@ -208,11 +222,13 @@
u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
{
+ assert_mac_suspended(dev);
return dev->phy.ops->phy_read(dev, reg);
}
void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
{
+ assert_mac_suspended(dev);
dev->phy.ops->phy_write(dev, reg, value);
}
diff --git a/drivers/net/wireless/b43/phy_g.c b/drivers/net/wireless/b43/phy_g.c
index 232181f..3b1d673 100644
--- a/drivers/net/wireless/b43/phy_g.c
+++ b/drivers/net/wireless/b43/phy_g.c
@@ -3047,6 +3047,8 @@
int rfatt, bbatt;
u8 tx_control;
+ b43_mac_suspend(dev);
+
spin_lock_irq(&dev->wl->irq_lock);
/* Calculate the new attenuation values. */
@@ -3103,6 +3105,8 @@
gphy->tx_control);
b43_radio_unlock(dev);
b43_phy_unlock(dev);
+
+ b43_mac_enable(dev);
}
static enum b43_txpwr_result b43_gphy_op_recalc_txpower(struct b43_wldev *dev,
@@ -3215,9 +3219,9 @@
struct b43_phy *phy = &dev->phy;
struct b43_phy_g *gphy = phy->g;
+ b43_mac_suspend(dev);
//TODO: update_aci_moving_average
if (gphy->aci_enable && gphy->aci_wlan_automatic) {
- b43_mac_suspend(dev);
if (!gphy->aci_enable && 1 /*TODO: not scanning? */ ) {
if (0 /*TODO: bunch of conditions */ ) {
phy->ops->interf_mitigation(dev,
@@ -3227,12 +3231,12 @@
if (/*(aci_average > 1000) &&*/ !b43_gphy_aci_scan(dev))
phy->ops->interf_mitigation(dev, B43_INTERFMODE_NONE);
}
- b43_mac_enable(dev);
} else if (gphy->interfmode == B43_INTERFMODE_NONWLAN &&
phy->rev == 1) {
//TODO: implement rev1 workaround
}
b43_lo_g_maintanance_work(dev);
+ b43_mac_enable(dev);
}
static void b43_gphy_op_pwork_60sec(struct b43_wldev *dev)