From db9683fb19a0f0da1cb4c296ffe1a8db03333cbc Mon Sep 17 00:00:00 2001 From: Stefano Brivio Date: Tue, 6 Nov 2007 22:48:45 +0100 Subject: [PATCH] b43legacy: rewrite and fix rfkill initialization The rfkill subsystem doesn't like code like that rfkill_allocate(); rfkill_register(); rfkill_unregister(); rfkill_register(); /* <- This will crash */ This sequence happens with modprobe b43 ifconfig wlanX up ifconfig wlanX down ifconfig wlanX up Fix this by always re-allocating the rfkill stuff before register. The patch to b43 by Michael Buesch has been ported to b43legacy. Signed-off-by: Stefano Brivio Signed-off-by: John W. Linville --- drivers/net/wireless/b43legacy/main.c | 2 -- drivers/net/wireless/b43legacy/rfkill.c | 16 ++++++++++------ drivers/net/wireless/b43legacy/rfkill.h | 8 ++++---- 3 files changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c index 8133efa5a5..2b888960c3 100644 --- a/drivers/net/wireless/b43legacy/main.c +++ b/drivers/net/wireless/b43legacy/main.c @@ -3384,7 +3384,6 @@ static int b43legacy_setup_modes(struct b43legacy_wldev *dev, static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev) { - b43legacy_rfkill_free(dev); /* We release firmware that late to not be required to re-request * is all the time when we reinit the core. */ b43legacy_release_firmware(dev); @@ -3466,7 +3465,6 @@ static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev) if (!wl->current_dev) wl->current_dev = dev; INIT_WORK(&dev->restart_work, b43legacy_chip_reset); - b43legacy_rfkill_alloc(dev); b43legacy_radio_turn_off(dev, 1); b43legacy_switch_analog(dev, 0); diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c index a366129c8b..b9d38a4f28 100644 --- a/drivers/net/wireless/b43legacy/rfkill.c +++ b/drivers/net/wireless/b43legacy/rfkill.c @@ -48,18 +48,21 @@ static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev) struct b43legacy_wldev *dev = poll_dev->private; struct b43legacy_wl *wl = dev->wl; bool enabled; + bool report_change = 0; mutex_lock(&wl->mutex); B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED); enabled = b43legacy_is_hw_radio_enabled(dev); if (unlikely(enabled != dev->radio_hw_enable)) { dev->radio_hw_enable = enabled; + report_change = 1; b43legacyinfo(wl, "Radio hardware status changed to %s\n", enabled ? "ENABLED" : "DISABLED"); - mutex_unlock(&wl->mutex); + } + mutex_unlock(&wl->mutex); + + if (unlikely(report_change)) input_report_key(poll_dev->input, KEY_WLAN, enabled); - } else - mutex_unlock(&wl->mutex); } /* Called when the RFKILL toggled in software. @@ -70,10 +73,11 @@ static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state) struct b43legacy_wl *wl = dev->wl; int err = 0; - mutex_lock(&wl->mutex); - if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) - goto out_unlock; + if (!wl->rfkill.registered) + return 0; + mutex_lock(&wl->mutex); + B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED); switch (state) { case RFKILL_STATE_ON: if (!dev->radio_hw_enable) { diff --git a/drivers/net/wireless/b43legacy/rfkill.h b/drivers/net/wireless/b43legacy/rfkill.h index b68215e788..11150a8032 100644 --- a/drivers/net/wireless/b43legacy/rfkill.h +++ b/drivers/net/wireless/b43legacy/rfkill.h @@ -16,14 +16,14 @@ struct b43legacy_rfkill { struct rfkill *rfkill; /* The poll device for the RFKILL input button */ struct input_polled_dev *poll_dev; + /* Did initialization succeed? Used for freeing. */ + bool registered; /* The unique name of this rfkill switch */ - char name[32]; + char name[sizeof("b43legacy-phy4294967295")]; }; -/* All the init functions return void, because we are not interested +/* The init function returns void, because we are not interested * in failing the b43 init process when rfkill init failed. */ -void b43legacy_rfkill_alloc(struct b43legacy_wldev *dev); -void b43legacy_rfkill_free(struct b43legacy_wldev *dev); void b43legacy_rfkill_init(struct b43legacy_wldev *dev); void b43legacy_rfkill_exit(struct b43legacy_wldev *dev); -- 2.39.5