ath9k_hw: disable fast channel change when changing from/to half/quarter mode

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index e576a92f18a3..75fd87f295d4 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1687,6 +1687,10 @@ static int ath9k_hw_do_fastcc(struct ath_hw *ah, struct ath9k_channel *chan)
         if (chan->channel == ah->curchan->channel)
                 goto fail;
 
+        if ((ah->curchan->channelFlags | chan->channelFlags) &
+            (CHANNEL_HALF | CHANNEL_QUARTER))
+                goto fail;
+
         if ((chan->channelFlags & CHANNEL_ALL) !=
             (ah->curchan->channelFlags & CHANNEL_ALL))
                 goto fail;