ath9k: restart hardware after noise floor calibration failure
When NF calibration fails, the radio often becomes deaf. The usual
hardware hang checks do not detect this, so it's better to issue a reset
when that happens.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/link.c b/drivers/net/wireless/ath/ath9k/link.c
index 2343f56..b829263 100644
--- a/drivers/net/wireless/ath/ath9k/link.c
+++ b/drivers/net/wireless/ath/ath9k/link.c
@@ -371,9 +371,15 @@
/* Perform calibration if necessary */
if (longcal || shortcal) {
- common->ani.caldone =
- ath9k_hw_calibrate(ah, ah->curchan,
- ah->rxchainmask, longcal);
+ int ret = ath9k_hw_calibrate(ah, ah->curchan, ah->rxchainmask,
+ longcal);
+ if (ret < 0) {
+ common->ani.caldone = 0;
+ ath9k_queue_reset(sc, RESET_TYPE_CALIBRATION);
+ return;
+ }
+
+ common->ani.caldone = ret;
}
ath_dbg(common, ANI,