ath9k_hw: Fix TX interrupt mitigation settings

TX interrupt mitigation reduces the number of interrupts
by addressing several interrupt actions (AR_IMR_TXOK,
AR_IMR_TXDESC) all in one interrupt so when enabling
it discard setting the other interrupts.

Without this TX interrupt mitigation would actually
increase the number of interrupts two-fold. We still
leave TX interrupt mitigation disabled as it is still
being tested.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 7bbf502563b..0e425cb4bbb 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -878,10 +878,12 @@ enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah,
         if (ints & ATH9K_INT_TX) {
                 if (ah->config.tx_intr_mitigation)
                         mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
-                if (ah->txok_interrupt_mask)
-                        mask |= AR_IMR_TXOK;
-                if (ah->txdesc_interrupt_mask)
-                        mask |= AR_IMR_TXDESC;
+                else {
+                        if (ah->txok_interrupt_mask)
+                                mask |= AR_IMR_TXOK;
+                        if (ah->txdesc_interrupt_mask)
+                                mask |= AR_IMR_TXDESC;
+                }
                 if (ah->txerr_interrupt_mask)
                         mask |= AR_IMR_TXERR;
                 if (ah->txeol_interrupt_mask)