somehow splnet was forgotten in the receive path which leads to
the following splassert:
splassert: if_start: want 7 have 5
Starting stack trace...
splassert_check() at splassert_check+0x7e
if_start() at if_start+0x32
ieee80211_deliver_data() at ieee80211_deliver_data+0x1bd
ieee80211_decap() at ieee80211_decap+0xd2
athn_usb_rx_frame() at athn_usb_rx_frame+0x115
athn_usb_rxeof() at athn_usb_rxeof+0xee
usb_transfer_complete() at usb_transfer_complete+0x256
ehci_softintr() at ehci_softintr+0x35
softintr_dispatch() at softintr_dispatch+0x5d
Xsoftnet() at Xsoftnet+0x2d
the following diff fixes that. ok?
Index: if_athn_usb.c
===================================================================
RCS file: /home/cvs/src/sys/dev/usb/if_athn_usb.c,v
retrieving revision 1.9
diff -u -p -u -p -r1.9 if_athn_usb.c
--- if_athn_usb.c 10 Nov 2012 14:35:06 -0000 1.9
+++ if_athn_usb.c 12 Nov 2012 00:38:23 -0000
@@ -1665,6 +1673,7 @@ athn_usb_rx_frame(struct athn_usb_softc
struct ar_htc_frame_hdr *htc;
struct ar_rx_status *rs;
uint16_t datalen;
+ int s;
if (__predict_false(m->m_len < sizeof(*htc)))
goto skip;
@@ -1695,6 +1704,8 @@ athn_usb_rx_frame(struct athn_usb_softc
m_adj(m, sizeof(*rs)); /* Strip Rx status. */
m->m_pkthdr.rcvif = ifp;
+ s = splnet();
+
/* Grab a reference to the source node. */
wh = mtod(m, struct ieee80211_frame *);
ni = ieee80211_find_rxnode(ic, wh);
@@ -1722,6 +1733,7 @@ athn_usb_rx_frame(struct athn_usb_softc
/* Node is no longer needed. */
ieee80211_release_node(ic, ni);
+ splx(s);
return;
skip:
m_freem(m);
