[PATCH] ath10k: don't allow stand alone monitor mode for non-AP firmware

[Chun-Yeow Yeoh]

Firmware 999.999.0.636 does not allow stand alone monitor
mode. This means that bridging the STA mode and put it into
promiscuous mode will also cause the firmware to crash. Avoid
this.

Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow at gmail.com>
---
 drivers/net/wireless/ath/ath10k/mac.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index e2c01dc..f640328 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -647,10 +647,15 @@ static int ath10k_monitor_vdev_delete(struct ath10k *ar)
 
 static int ath10k_monitor_start(struct ath10k *ar)
 {
-	int ret;
+	int ret = -1;
 
 	lockdep_assert_held(&ar->conf_mutex);
 
+	if (ar->fw_version_build == 636) {
+		ath10k_warn("stand alone monitor mode is not supported\n");
+		return ret;
+	}
+
 	if (!ath10k_monitor_is_enabled(ar)) {
 		ath10k_warn("trying to start monitor with no references\n");
 		return 0;
-- 
1.9.2