diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 35f5cf4..894f5fc 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -2420,14 +2420,25 @@ void ath9k_hw_write_associd(struct ath_hw *ah) } EXPORT_SYMBOL(ath9k_hw_write_associd); +#define ATH9K_MAX_TSF_READ 10 + u64 ath9k_hw_gettsf64(struct ath_hw *ah) { - u64 tsf; + u32 tsf_lower, tsf_upper1, tsf_upper2; + int i; + + tsf_upper1 = REG_READ(ah, AR_TSF_U32); + for (i = 0; i < ATH9K_MAX_TSF_READ; i++) { + tsf_lower = REG_READ(ah, AR_TSF_L32); + tsf_upper2 = REG_READ(ah, AR_TSF_U32); + if (tsf_upper2 == tsf_upper1) + break; + tsf_upper1 = tsf_upper2; + } - tsf = REG_READ(ah, AR_TSF_U32); - tsf = (tsf << 32) | REG_READ(ah, AR_TSF_L32); + WARN_ON( i == ATH9K_MAX_TSF_READ ); - return tsf; + return (((u64)tsf_upper1 << 32) | tsf_lower); } EXPORT_SYMBOL(ath9k_hw_gettsf64); |