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mac80211: fix channel switch for chanctx-based drivers

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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.

Reported-by: Linus Torvalds <[email protected]>
Signed-off-by: Michal Kazior <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Michal Kazior authored and Linus Torvalds committed 2014-08-22 14:45:49 -07:00
1 parent 433ab34d26
commit 47e4df94d1
1 file changed
+1 -1
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net/mac80211/chan.c
+1 -1
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@@ -1444,7 +1444,7 @@ ieee80211_vif_use_reserved_switch(struct ieee80211_local *local)
list_del(&sdata->reserved_chanctx_list);
list_move(&sdata->assigned_chanctx_list,
&new_ctx->assigned_vifs);
&ctx->assigned_vifs);
sdata->reserved_chanctx = NULL;
ieee80211_vif_chanctx_reservation_complete(sdata);