diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2014-02-24 22:26:05 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-02-25 14:54:11 -0500 |
| commit | d31a36a6d87f68c3b97193bfca11e99d0cc385f7 (patch) | |
| tree | e1586491e05e15ae022e57eed28d53ea0a1e7e2f /drivers | |
| parent | 558ff225de80ac95b132d3a115ddadcd64498b4f (diff) | |
| download | linux-d31a36a6d87f68c3b97193bfca11e99d0cc385f7.tar.bz2 | |
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: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 11eab9f01fd8..303ce27964c1 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -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; |