[06/30] ath5k: Use DCU early termination correctly

Commit Message

Nick Kossifidis Nov. 23, 2010, 6:50 p.m. UTC

None

Patch

diff --git a/drivers/net/wireless/ath/ath5k/dma.c b/drivers/net/wireless/ath/ath5k/dma.c
index e39c953..bfdfcff 100644
--- a/drivers/net/wireless/ath/ath5k/dma.c
+++ b/drivers/net/wireless/ath/ath5k/dma.c
@@ -216,6 +216,14 @@  int ath5k_hw_stop_tx_dma(struct ath5k_hw *ah, unsigned int queue)
 		ath5k_hw_reg_write(ah, tx_queue, AR5K_CR);
 		ath5k_hw_reg_read(ah, AR5K_CR);
 	} else {
+
+		/*
+		 * Enable DCU early termination to quickly
+		 * flush any pending frames from QCU
+		 */
+		AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+					AR5K_QCU_MISC_DCU_EARLY);
+
 		/*
 		 * Schedule TX disable and wait until queue is empty
 		 */
@@ -285,6 +293,12 @@  int ath5k_hw_stop_tx_dma(struct ath5k_hw *ah, unsigned int queue)
 					queue);
 		}
 
+		/*
+		 * Disable DCU early termination
+		 */
+		AR5K_REG_DISABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
+					AR5K_QCU_MISC_DCU_EARLY);
+
 		/* Clear register */
 		ath5k_hw_reg_write(ah, 0, AR5K_QCU_TXD);
 		if (pending) {
diff --git a/drivers/net/wireless/ath/ath5k/qcu.c b/drivers/net/wireless/ath/ath5k/qcu.c
index 52eee34f..ed62273 100644
--- a/drivers/net/wireless/ath/ath5k/qcu.c
+++ b/drivers/net/wireless/ath/ath5k/qcu.c
@@ -340,9 +340,6 @@  int ath5k_hw_reset_tx_queue(struct ath5k_hw *ah, unsigned int queue)
 		/*
 		 * Set misc registers
 		 */
-		/* Enable DCU early termination for this queue */
-		AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_MISC(queue),
-					AR5K_QCU_MISC_DCU_EARLY);
 
 		/* Enable DCU to wait for next fragment from QCU */
 		AR5K_REG_ENABLE_BITS(ah, AR5K_QUEUE_DFS_MISC(queue),