mac80211: fix channel switch for chanctx-based drivers

The new_ctx pointer is set only for non-chanctx drivers. This yielded a crash for chanctx-based drivers during channel switch finalization: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 IP: ieee80211_vif_use_reserved_switch+0x71c/0xb00 [mac80211] Use an adequate chanctx pointer to fix this.

Michal Kazior committed 12 years ago

Commit 47e4df91 parent 433ab341 file · +1 −1Browse files

Unified · Split

net/mac80211/chan.c+1−1

@@ -1444,7 +1444,7 @@ ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) · 1443 unmodified lines
1444		1444
1445	list_del(&sdata->reserved_chanctx_list);	1445	list_del(&sdata->reserved_chanctx_list);
1446	list_move(&sdata->assigned_chanctx_list,	1446	list_move(&sdata->assigned_chanctx_list,
1447	&new_ctx->assigned_vifs);	1447	&ctx->assigned_vifs);
1448	sdata->reserved_chanctx = NULL;	1448	sdata->reserved_chanctx = NULL;
1449		1449
1450	ieee80211_vif_chanctx_reservation_complete(sdata);	1450	ieee80211_vif_chanctx_reservation_complete(sdata);