ath9k: fix a crash in the PA predistortion apply function

When updating the PAPRD table in hardware, PAPRD itself needs to be
disabled first, otherwise the hardware can throw a data bus error,
which upsets at least some platforms.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 0429dda..6c1d9ef 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -239,6 +239,7 @@ static void ath_paprd_activate(struct ath_softc *sc)
                return;
 
        ath9k_ps_wakeup(sc);
+       ar9003_paprd_enable(ah, false);
        for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) {
                if (!(ah->caps.tx_chainmask & BIT(chain)))
                        continue;