2 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 7f696c82ca0a..6b9233472fbf 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -61,6 +61,8 @@
 
 #define ATH9K_RSSI_BAD                  -128
 
+#define ATH9K_NUM_CHANNELS      38
+
 /* Register read/write primitives */
 #define REG_WRITE(_ah, _reg, _val) \
         ath9k_hw_common(_ah)->ops->write((_ah), (_val), (_reg))
@@ -618,7 +620,7 @@ struct ath_hw {
         struct ath9k_hw_version hw_version;
         struct ath9k_ops_config config;
         struct ath9k_hw_capabilities caps;
-        struct ath9k_channel channels[38];
+        struct ath9k_channel channels[ATH9K_NUM_CHANNELS];
         struct ath9k_channel *curchan;
 
         union {
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index d76003c06fe4..a4c5ed41b176 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -481,6 +481,10 @@ static int ath9k_init_channels_rates(struct ath_softc *sc)
 {
         void *channels;
 
+        BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
+                     ARRAY_SIZE(ath9k_5ghz_chantable) !=
+                     ATH9K_NUM_CHANNELS);
+
         if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes)) {
                 channels = kmemdup(ath9k_2ghz_chantable,
                         sizeof(ath9k_2ghz_chantable), GFP_KERNEL);