From 793985a2390311c7a321254c220a25a9e57aa610 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Tue, 10 Jun 2014 12:51:06 +0200 Subject: [PATCH] rt2x00: disable TKIP on USB commit 8edcb0ba0d56f5914eef11eda6db8bfe74eb9ca8 upstream. On USB we can not get atomically TKIP key. We have to disable support for TKIP acceleration on USB hardware to avoid bug as showed bellow. [ 860.827243] BUG: scheduling while atomic: hostapd/3397/0x00000002 [ 860.827280] Call Trace: [ 860.827282] [] dump_stack+0x4d/0x66 [ 860.827284] [] __schedule_bug+0x47/0x55 [ 860.827285] [] __schedule+0x733/0x7b0 [ 860.827287] [] schedule+0x29/0x70 [ 860.827289] [] schedule_timeout+0x15a/0x2b0 [ 860.827291] [] ? ftrace_raw_event_tick_stop+0xc0/0xc0 [ 860.827294] [] ? __module_text_address+0x12/0x70 [ 860.827296] [] wait_for_completion_timeout+0xb3/0x140 [ 860.827298] [] ? wake_up_state+0x20/0x20 [ 860.827301] [] usb_start_wait_urb+0x7d/0x150 [ 860.827303] [] usb_control_msg+0xc5/0x110 [ 860.827305] [] rt2x00usb_vendor_request+0xc6/0x160 [rt2x00usb] [ 860.827307] [] rt2x00usb_vendor_req_buff_lock+0x75/0x150 [rt2x00usb] [ 860.827309] [] rt2x00usb_vendor_request_buff+0xa3/0xe0 [rt2x00usb] [ 860.827311] [] rt2x00usb_register_multiread+0x33/0x40 [rt2800usb] [ 860.827314] [] rt2800_get_tkip_seq+0x39/0x50 [rt2800lib] [ 860.827321] [] ieee80211_get_key+0x218/0x2a0 [mac80211] [ 860.827322] [] ? __nlmsg_put+0x6c/0x80 [ 860.827329] [] nl80211_get_key+0x22e/0x360 [cfg80211] Reported-and-tested-by: Peter Wu Reported-and-tested-by: Pontus Fuchs Signed-off-by: Stanislaw Gruszka Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/rt2x00/rt2x00mac.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c index a87ee9b6585a..87a8ad5d2eb7 100644 --- a/drivers/net/wireless/rt2x00/rt2x00mac.c +++ b/drivers/net/wireless/rt2x00/rt2x00mac.c @@ -487,6 +487,8 @@ int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, crypto.cipher = rt2x00crypto_key_to_cipher(key); if (crypto.cipher == CIPHER_NONE) return -EOPNOTSUPP; + if (crypto.cipher == CIPHER_TKIP && rt2x00_is_usb(rt2x00dev)) + return -EOPNOTSUPP; crypto.cmd = cmd; -- 2.39.2