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Be more careful handling off-channel frames: if the driver (wrongly)

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sends frames up the stack after changing the current channel then
the lookup by ieee channel number may fail leaving a null ptr in
se_chan; if this happens fallback to the channel recorded when the
frame is processed (curchan).  Since the frame doesn't contribute
to scan results for the sta this is acceptable.

Reviewed by:	thompsa
MFC after:	3 days
This commit is contained in:
Sam Leffler 2007-11-26 21:28:18 +00:00
parent 1b72425ab3
commit 1a4ae5c45b
1 changed files with 4 additions and 3 deletions
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7
sys/net80211/ieee80211_scan_sta.c
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@ -290,11 +290,12 @@ found:
*/
c = ieee80211_find_channel_byieee(ic, sp->bchan,
sp->curchan->ic_flags);
if (c == NULL && ise->se_chan == NULL) {
if (c != NULL) {
ise->se_chan = c;
} else if (ise->se_chan == NULL) {
/* should not happen, pick something */
c = sp->curchan;
ise->se_chan = sp->curchan;
}
ise->se_chan = c;
} else
ise->se_chan = sp->curchan;
ise->se_fhdwell = sp->fhdwell;