Re: Regression in 2.6.27-rcX caused by commit bc19d6e0b74ef03a3baf035412c95192b54dfc6f

[Matthew Garrett <mjg59@srcf.ucam.org>]

Oh, hey, I suck. This one might stand a better chance of not falling 
over.

diff --git a/drivers/net/wireless/b43/rfkill.c b/drivers/net/wireless/b43/rfkill.c
index fec5645..991e318 100644
--- a/drivers/net/wireless/b43/rfkill.c
+++ b/drivers/net/wireless/b43/rfkill.c
@@ -49,21 +49,18 @@ static void b43_rfkill_update_state(struct b43_wldev *dev)
 	struct b43_rfkill *rfk = &(dev->wl->rfkill);
 
 	if (!dev->radio_hw_enable) {
-		rfk->rfkill->state = RFKILL_STATE_HARD_BLOCKED;
+		rfkill_force_state(rfk->rfkill, RFKILL_STATE_HARD_BLOCKED);
 		return;
 	}
 
 	if (!dev->phy.radio_on)
-		rfk->rfkill->state = RFKILL_STATE_SOFT_BLOCKED;
+		rfkill_force_state(rfk->rfkill, RFKILL_STATE_SOFT_BLOCKED);
 	else
-		rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
-
+		rfkill_force_state(rfk->rfkill, RFKILL_STATE_UNBLOCKED);
 }
 
-/* The poll callback for the hardware button. */
-static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
+static void b43_rfkill_update(struct b43_wldev *dev)
 {
-	struct b43_wldev *dev = poll_dev->private;
 	struct b43_wl *wl = dev->wl;
 	bool enabled;
 	bool report_change = 0;
@@ -82,13 +79,25 @@ static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
 			enabled ? "ENABLED" : "DISABLED");
 	}
 	mutex_unlock(&wl->mutex);
+}
 
-	/* 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);
-	}
+static void b43_rfkill_poll(unsigned long data)
+{
+	struct b43_rfkill *rfkill = (struct b43_rfkill *)data;
+	schedule_work(&rfkill->poll_queue);
+}
+
+static void b43_rfkill_work(struct work_struct *work)
+{
+	struct b43_rfkill *rfk = container_of(work, struct b43_rfkill, 
+					      poll_queue);
+	struct b43_wl *wl = container_of(rfk, struct b43_wl, rfkill);
+	struct b43_wldev *dev = wl->current_dev;
+
+	b43_rfkill_update(dev);
+	rfk->poll_timer.function = b43_rfkill_poll;
+	rfk->poll_timer.expires = round_jiffies(jiffies + HZ);
+	add_timer(&rfk->poll_timer);
 }
 
 /* Called when the RFKILL toggled in software. */
@@ -158,48 +167,23 @@ void b43_rfkill_init(struct b43_wldev *dev)
 	rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
 	rfk->rfkill->user_claim_unsupported = 1;
 
-	rfk->poll_dev = input_allocate_polled_device();
-	if (!rfk->poll_dev) {
-		rfkill_free(rfk->rfkill);
-		goto err_freed_rfk;
-	}
-
-	rfk->poll_dev->private = dev;
-	rfk->poll_dev->poll = b43_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;
+		goto err_free_rfk;
 
-#ifdef CONFIG_RFKILL_INPUT_MODULE
-	/* B43 RF-kill isn't useful without the rfkill-input subsystem.
-	 * Try to load the module. */
-	err = request_module("rfkill-input");
-	if (err)
-		b43warn(wl, "Failed to load the rfkill-input module. "
-			"The built-in radio LED will not work.\n");
-#endif /* CONFIG_RFKILL_INPUT */
+	rfk->registered = 1;
 
-	err = input_register_polled_device(rfk->poll_dev);
-	if (err)
-		goto err_unreg_rfk;
+	INIT_WORK(&rfk->poll_queue, b43_rfkill_work);
 
-	rfk->registered = 1;
+	init_timer(&rfk->poll_timer);
+	rfk->poll_timer.function = b43_rfkill_poll;
+	rfk->poll_timer.expires = round_jiffies(jiffies + HZ);
+	rfk->poll_timer.data = (unsigned long)rfk;
+	add_timer(&rfk->poll_timer);
 
 	return;
-err_unreg_rfk:
-	rfkill_unregister(rfk->rfkill);
-err_free_polldev:
-	input_free_polled_device(rfk->poll_dev);
-	rfk->poll_dev = NULL;
-err_freed_rfk:
+err_free_rfk:
+	rfkill_free(rfk->rfkill);
 	rfk->rfkill = NULL;
 out_error:
 	rfk->registered = 0;
@@ -214,9 +198,8 @@ void b43_rfkill_exit(struct b43_wldev *dev)
 		return;
 	rfk->registered = 0;
 
-	input_unregister_polled_device(rfk->poll_dev);
+	del_timer(&rfk->poll_timer);
+
 	rfkill_unregister(rfk->rfkill);
-	input_free_polled_device(rfk->poll_dev);
-	rfk->poll_dev = NULL;
 	rfk->rfkill = NULL;
 }
diff --git a/drivers/net/wireless/b43/rfkill.h b/drivers/net/wireless/b43/rfkill.h
index adacf93..1a4a719 100644
--- a/drivers/net/wireless/b43/rfkill.h
+++ b/drivers/net/wireless/b43/rfkill.h
@@ -7,14 +7,14 @@ struct b43_wldev;
 #ifdef CONFIG_B43_RFKILL
 
 #include <linux/rfkill.h>
-#include <linux/input-polldev.h>
-
 
 struct b43_rfkill {
 	/* The RFKILL subsystem data structure */
 	struct rfkill *rfkill;
-	/* The poll device for the RFKILL input button */
-	struct input_polled_dev *poll_dev;
+	/* The timer list for the RFKILL polling */
+	struct timer_list poll_timer;
+	/* Workqueue for the RFKILL polling */
+	struct work_struct poll_queue;
 	/* Did initialization succeed? Used for freeing. */
 	bool registered;
 	/* The unique name of this rfkill switch */

-- 
Matthew Garrett | mjg59@srcf.ucam.org