1 files changed, 74 insertions, 59 deletions

diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index b9d38a4f286d..520910fd5c45 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -26,6 +26,8 @@
 #include "radio.h"
 #include "b43legacy.h"
 
+#include <linux/kmod.h>
+
 
 /* Returns TRUE, if the radio is enabled in hardware. */
 static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
@@ -51,7 +53,10 @@ static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev)
         bool report_change = 0;
 
         mutex_lock(&wl->mutex);
-        B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED);
+        if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
+                mutex_unlock(&wl->mutex);
+                return;
+        }
         enabled = b43legacy_is_hw_radio_enabled(dev);
         if (unlikely(enabled != dev->radio_hw_enable)) {
                 dev->radio_hw_enable = enabled;
@@ -61,8 +66,12 @@ static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev)
         }
         mutex_unlock(&wl->mutex);
 
-        if (unlikely(report_change))
-                input_report_key(poll_dev->input, KEY_WLAN, enabled);
+        /* send the radio switch event to the system - note both a key press
+         * and a release are required */
+        if (unlikely(report_change)) {
+                input_report_key(poll_dev->input, KEY_WLAN, 1);
+                input_report_key(poll_dev->input, KEY_WLAN, 0);
+        }
 }
 
 /* Called when the RFKILL toggled in software.
@@ -71,13 +80,15 @@ static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state)
 {
         struct b43legacy_wldev *dev = data;
         struct b43legacy_wl *wl = dev->wl;
-        int err = 0;
+        int err = -EBUSY;
 
         if (!wl->rfkill.registered)
                 return 0;
 
         mutex_lock(&wl->mutex);
-        B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED);
+        if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
+                goto out_unlock;
+        err = 0;
         switch (state) {
         case RFKILL_STATE_ON:
                 if (!dev->radio_hw_enable) {
@@ -103,11 +114,11 @@ out_unlock:
 
 char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
 {
-        struct b43legacy_wl *wl = dev->wl;
+        struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 
-        if (!wl->rfkill.rfkill)
+        if (!rfk->registered)
                 return NULL;
-        return rfkill_get_led_name(wl->rfkill.rfkill);
+        return rfkill_get_led_name(rfk->rfkill);
 }
 
 void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
@@ -116,53 +127,13 @@ void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
         struct b43legacy_rfkill *rfk = &(wl->rfkill);
         int err;
 
-        if (rfk->rfkill) {
-                err = rfkill_register(rfk->rfkill);
-                if (err) {
-                        b43legacywarn(wl, "Failed to register RF-kill button\n");
-                        goto err_free_rfk;
-                }
-        }
-        if (rfk->poll_dev) {
-                err = input_register_polled_device(rfk->poll_dev);
-                if (err) {
-                        b43legacywarn(wl, "Failed to register RF-kill polldev\n");
-                        goto err_free_polldev;
-                }
-        }
-
-        return;
-err_free_rfk:
-        rfkill_free(rfk->rfkill);
-        rfk->rfkill = NULL;
-err_free_polldev:
-        input_free_polled_device(rfk->poll_dev);
-        rfk->poll_dev = NULL;
-}
-
-void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
-{
-        struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
-
-        if (rfk->poll_dev)
-                input_unregister_polled_device(rfk->poll_dev);
-        if (rfk->rfkill)
-                rfkill_unregister(rfk->rfkill);
-}
-
-void b43legacy_rfkill_alloc(struct b43legacy_wldev *dev)
-{
-        struct b43legacy_wl *wl = dev->wl;
-        struct b43legacy_rfkill *rfk = &(wl->rfkill);
+        rfk->registered = 0;
 
+        rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
+        if (!rfk->rfkill)
+                goto out_error;
         snprintf(rfk->name, sizeof(rfk->name),
                  "b43legacy-%s", wiphy_name(wl->hw->wiphy));
-
-        rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
-        if (!rfk->rfkill) {
-                b43legacywarn(wl, "Failed to allocate RF-kill button\n");
-                return;
-        }
         rfk->rfkill->name = rfk->name;
         rfk->rfkill->state = RFKILL_STATE_ON;
         rfk->rfkill->data = dev;
@@ -170,20 +141,64 @@ void b43legacy_rfkill_alloc(struct b43legacy_wldev *dev)
         rfk->rfkill->user_claim_unsupported = 1;
 
         rfk->poll_dev = input_allocate_polled_device();
-        if (rfk->poll_dev) {
-                rfk->poll_dev->private = dev;
-                rfk->poll_dev->poll = b43legacy_rfkill_poll;
-                rfk->poll_dev->poll_interval = 1000; /* msecs */
-        } else
-                b43legacywarn(wl, "Failed to allocate RF-kill polldev\n");
+        if (!rfk->poll_dev)
+                goto err_free_rfk;
+        rfk->poll_dev->private = dev;
+        rfk->poll_dev->poll = b43legacy_rfkill_poll;
+        rfk->poll_dev->poll_interval = 1000; /* msecs */
+
+        rfk->poll_dev->input->name = rfk->name;
+        rfk->poll_dev->input->id.bustype = BUS_HOST;
+        rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor;
+        rfk->poll_dev->input->evbit[0] = BIT(EV_KEY);
+        set_bit(KEY_WLAN, rfk->poll_dev->input->keybit);
+
+        err = rfkill_register(rfk->rfkill);
+        if (err)
+                goto err_free_polldev;
+
+#ifdef CONFIG_RFKILL_INPUT_MODULE
+        /* B43legacy RF-kill isn't useful without the rfkill-input subsystem.
+         * Try to load the module. */
+        err = request_module("rfkill-input");
+        if (err)
+                b43legacywarn(wl, "Failed to load the rfkill-input module."
+                        "The built-in radio LED will not work.\n");
+#endif /* CONFIG_RFKILL_INPUT */
+
+        err = input_register_polled_device(rfk->poll_dev);
+        if (err)
+                goto err_unreg_rfk;
+
+        rfk->registered = 1;
+
+        return;
+err_unreg_rfk:
+        rfkill_unregister(rfk->rfkill);
+err_free_polldev:
+        input_free_polled_device(rfk->poll_dev);
+        rfk->poll_dev = NULL;
+err_free_rfk:
+        rfkill_free(rfk->rfkill);
+        rfk->rfkill = NULL;
+out_error:
+        rfk->registered = 0;
+        b43legacywarn(wl, "RF-kill button init failed\n");
 }
 
-void b43legacy_rfkill_free(struct b43legacy_wldev *dev)
+void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
 {
         struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 
+        if (!rfk->registered)
+                return;
+        rfk->registered = 0;
+
+        input_unregister_polled_device(rfk->poll_dev);
+        rfkill_unregister(rfk->rfkill);
         input_free_polled_device(rfk->poll_dev);
         rfk->poll_dev = NULL;
         rfkill_free(rfk->rfkill);
         rfk->rfkill = NULL;
 }
+