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Commit d31a36a6 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville
Browse files

ath9k: reduce baseband hang detection false positive rate 



Check if the baseband state remains stable, and add a small delay
between register reads.

Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 558ff225

drivers/net/wireless/ath/ath9k/hw.c

+7 −1
Original line number Diff line number Diff line
@@ -1534,7 +1534,7 @@ EXPORT_SYMBOL(ath9k_hw_check_nav); 
bool ath9k_hw_check_alive(struct ath_hw *ah)

{

	int count = 50;

	u32 reg;

	u32 reg, last_val;



	if (AR_SREV_9300(ah))

		return !ath9k_hw_detect_mac_hang(ah);
@@ -1542,9 +1542,13 @@ bool ath9k_hw_check_alive(struct ath_hw *ah) 
	if (AR_SREV_9285_12_OR_LATER(ah))

		return true;



	last_val = REG_READ(ah, AR_OBS_BUS_1);

	do {

		reg = REG_READ(ah, AR_OBS_BUS_1);

		if (reg != last_val)

			return true;



		last_val = reg;

		if ((reg & 0x7E7FFFEF) == 0x00702400)

			continue;
@@ -1556,6 +1560,8 @@ bool ath9k_hw_check_alive(struct ath_hw *ah) 
		default:

			return true;

		}



		udelay(1);

	} while (count-- > 0);



	return false;