--- zzzz-none-000/linux-3.10.107/drivers/net/wireless/ath/ath5k/dma.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/net/wireless/ath/ath5k/dma.c	2021-02-04 17:41:59.000000000 +0000
@@ -616,7 +616,16 @@
 		 * SISRs will also clear PISR so no need to worry here.
 		 */
 
-		pisr_clear = pisr & ~AR5K_ISR_BITS_FROM_SISRS;
+		/* XXX: There seems to be  an issue on some cards
+		 *	with tx interrupt flags not being updated
+		 *	on PISR despite that all Tx interrupt bits
+		 * 	are cleared on SISRs. Since we handle all
+		 *	Tx queues all together it shouldn't be an
+		 *	issue if we clear Tx interrupt flags also
+		 * 	on PISR to avoid that.
+		 */
+		pisr_clear = (pisr & ~AR5K_ISR_BITS_FROM_SISRS) |
+					(pisr & AR5K_INT_TX_ALL);
 
 		/*
 		 * Write to clear them...
@@ -661,7 +670,7 @@
 			ah->ah_txq_isr_txok_all |= AR5K_REG_MS(sisr1,
 						AR5K_SISR1_QCU_TXEOL);
 
-		/* Currently this is not much usefull since we treat
+		/* Currently this is not much useful since we treat
 		 * all queues the same way if we get a TXURN (update
 		 * tx trigger level) but we might need it later on*/
 		if (pisr & AR5K_ISR_TXURN)