ath9k: Update TX trigger level on a FIFO underrun.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath9k/mac.c b/drivers/net/wireless/ath9k/mac.c
index c344a81e738a..36955e0b1849 100644
--- a/drivers/net/wireless/ath9k/mac.c
+++ b/drivers/net/wireless/ath9k/mac.c
@@ -293,8 +293,10 @@ int ath9k_hw_txprocdesc(struct ath_hal *ah, struct ath_desc *ds)
                 ds->ds_txstat.ts_status |= ATH9K_TXERR_XRETRY;
         if (ads->ds_txstatus1 & AR_Filtered)
                 ds->ds_txstat.ts_status |= ATH9K_TXERR_FILT;
-        if (ads->ds_txstatus1 & AR_FIFOUnderrun)
+        if (ads->ds_txstatus1 & AR_FIFOUnderrun) {
                 ds->ds_txstat.ts_status |= ATH9K_TXERR_FIFO;
+                ath9k_hw_updatetxtriglevel(ah, true);
+        }
         if (ads->ds_txstatus9 & AR_TxOpExceeded)
                 ds->ds_txstat.ts_status |= ATH9K_TXERR_XTXOP;
         if (ads->ds_txstatus1 & AR_TxTimerExpired)