[PATCH] ath9k: don't trigger spectral scan when not enabled

[Zefir Kurtisi]

Doing so enables the FFT generation without prior
configuration, leading to an IRQ storm caused by
invalid (or at least unwanted) PHY errors.

Signed-off-by: Zefir Kurtisi <zefir.kurt...@neratec.com>
---
 drivers/net/wireless/ath/ath9k/common-spectral.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/ath/ath9k/common-spectral.c 
b/drivers/net/wireless/ath/ath9k/common-spectral.c
index 58f1ed1..51b618c 100644
--- a/drivers/net/wireless/ath/ath9k/common-spectral.c
+++ b/drivers/net/wireless/ath/ath9k/common-spectral.c
@@ -739,6 +739,9 @@ void ath9k_cmn_spectral_scan_trigger(struct ath_common 
*common,
                return;
        }
 
+       if (!spec_priv->spec_config.enabled)
+               return;
+
        ath_ps_ops(common)->wakeup(common);
        rxfilter = ath9k_hw_getrxfilter(ah);
        ath9k_hw_setrxfilter(ah, rxfilter |
-- 
2.7.4