| From 8edcb0ba0d56f5914eef11eda6db8bfe74eb9ca8 Mon Sep 17 00:00:00 2001 |
| From: Stanislaw Gruszka <sgruszka@redhat.com> |
| Date: Tue, 10 Jun 2014 12:51:06 +0200 |
| Subject: rt2x00: disable TKIP on USB |
| |
| From: Stanislaw Gruszka <sgruszka@redhat.com> |
| |
| 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 |
| <snip> |
| [ 860.827280] Call Trace: |
| [ 860.827282] [<ffffffff81682ea6>] dump_stack+0x4d/0x66 |
| [ 860.827284] [<ffffffff8167eb9b>] __schedule_bug+0x47/0x55 |
| [ 860.827285] [<ffffffff81685bb3>] __schedule+0x733/0x7b0 |
| [ 860.827287] [<ffffffff81685c59>] schedule+0x29/0x70 |
| [ 860.827289] [<ffffffff81684f8a>] schedule_timeout+0x15a/0x2b0 |
| [ 860.827291] [<ffffffff8105ac50>] ? ftrace_raw_event_tick_stop+0xc0/0xc0 |
| [ 860.827294] [<ffffffff810c13c2>] ? __module_text_address+0x12/0x70 |
| [ 860.827296] [<ffffffff81686823>] wait_for_completion_timeout+0xb3/0x140 |
| [ 860.827298] [<ffffffff81080fc0>] ? wake_up_state+0x20/0x20 |
| [ 860.827301] [<ffffffff814d5b3d>] usb_start_wait_urb+0x7d/0x150 |
| [ 860.827303] [<ffffffff814d5cd5>] usb_control_msg+0xc5/0x110 |
| [ 860.827305] [<ffffffffa02fb0c6>] rt2x00usb_vendor_request+0xc6/0x160 [rt2x00usb] |
| [ 860.827307] [<ffffffffa02fb215>] rt2x00usb_vendor_req_buff_lock+0x75/0x150 [rt2x00usb] |
| [ 860.827309] [<ffffffffa02fb393>] rt2x00usb_vendor_request_buff+0xa3/0xe0 [rt2x00usb] |
| [ 860.827311] [<ffffffffa023d1a3>] rt2x00usb_register_multiread+0x33/0x40 [rt2800usb] |
| [ 860.827314] [<ffffffffa05805f9>] rt2800_get_tkip_seq+0x39/0x50 [rt2800lib] |
| [ 860.827321] [<ffffffffa0480f88>] ieee80211_get_key+0x218/0x2a0 [mac80211] |
| [ 860.827322] [<ffffffff815cc68c>] ? __nlmsg_put+0x6c/0x80 |
| [ 860.827329] [<ffffffffa051b02e>] nl80211_get_key+0x22e/0x360 [cfg80211] |
| |
| Reported-and-tested-by: Peter Wu <lekensteyn@gmail.com> |
| Reported-and-tested-by: Pontus Fuchs <pontus.fuchs@gmail.com> |
| Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> |
| Signed-off-by: John W. Linville <linville@tuxdriver.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/net/wireless/rt2x00/rt2x00mac.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/drivers/net/wireless/rt2x00/rt2x00mac.c |
| +++ b/drivers/net/wireless/rt2x00/rt2x00mac.c |
| @@ -487,6 +487,8 @@ int rt2x00mac_set_key(struct ieee80211_h |
| 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; |
| |