From e223b6dc051ad030a70d5c6ed6226b95bdfc3af7 Mon Sep 17 00:00:00 2001 From: Rami Rosen Date: Wed, 14 Jan 2009 00:00:13 +0200 Subject: [PATCH] rt2x00: fix a wrong parameter for __test_and_clear_bit() in rt2x00rfkill_free(). When running modprobe rt73usb, and then rmmod rt73usb, and then iwconfig, the wlan0 device does not disappear. When repeating this process again, we get a kernel Oops errors and "BUG: unable to handle kernel paging request..." message in the kernel log. The reason for this is that there is an error in rt2x00rfkill_free(), which is called in the process of removing the device (rt2x00lib_remove_dev() in rt2x00dev.c). rt2x00rfkill_free() clears the RFKILL_STATE_ALLOCATED bit , which is bit number 1 () in rt2x00dev->flags instead of in rt2x00dev->rfkill_state. As a result, when checking the DEVICE_STATE_REGISTERED_HW bit (bit number 1 in rt2x00dev->flags) in rt2x00lib_remove_hw() it is **unset**, and we wrongly **don't** call ieee80211_unregister_hw(). This patch corrects this: the parameter for __test_and_clear_bit() in rt2x00rfkill_free() should be &rt2x00dev->rfkill_state and not &rt2x00dev->flags. Signed-off-by: Rami Rosen Acked-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2x00rfkill.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/rt2x00/rt2x00rfkill.c b/drivers/net/wireless/rt2x00/rt2x00rfkill.c index c3f53a92180..3298cae1e12 100644 --- a/drivers/net/wireless/rt2x00/rt2x00rfkill.c +++ b/drivers/net/wireless/rt2x00/rt2x00rfkill.c @@ -162,7 +162,7 @@ void rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev) void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev) { - if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->flags)) + if (!test_bit(RFKILL_STATE_ALLOCATED, &rt2x00dev->rfkill_state)) return; cancel_delayed_work_sync(&rt2x00dev->rfkill_work); -- 2.41.0