diff --git a/package/mac80211/patches/541-ath9k_ar9100_rx_chainmask_fix.patch b/package/mac80211/patches/541-ath9k_ar9100_rx_chainmask_fix.patch
new file mode 100644
index 0000000000..fb06f01ec4
--- /dev/null
+++ b/package/mac80211/patches/541-ath9k_ar9100_rx_chainmask_fix.patch
@@ -0,0 +1,11 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1878,6 +1878,8 @@ int ath9k_hw_fill_cap_info(struct ath_hw
+ 	    !(AR_SREV_9271(ah)))
+ 		/* CB71: GPIO 0 is pulled down to indicate 3 rx chains */
+ 		pCap->rx_chainmask = ath9k_hw_gpio_get(ah, 0) ? 0x5 : 0x7;
++	else if (AR_SREV_9100(ah))
++		pCap->rx_chainmask = 0x7;
+ 	else
+ 		/* Use rx_chainmask from EEPROM. */
+ 		pCap->rx_chainmask = ah->eep_ops->get_eeprom(ah, EEP_RX_MASK);