ath5k uses 8 usec as a sifs time, extracted from the initvals, whereas the
standard requires a sifs time of 10. The difference originates from the fact
that the SIFS register has an offset of 2 usec.
Fix the SIFS time definition to use the standard value of 10 usec and subtract
2 usecs when writing the SIFS register.
Signed-off-by: Felix Fietkau <n...@openwrt.org>
---
drivers/net/wireless/ath/ath5k/ath5k.h | 3 +--
drivers/net/wireless/ath/ath5k/qcu.c | 2 +-
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h
b/drivers/net/wireless/ath/ath5k/ath5k.h
index 996d8af..a49aeac 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -224,8 +224,7 @@
/* SIFS */
#define AR5K_INIT_SIFS_TURBO 6
-/* XXX: 8 from initvals 10 from standard */
-#define AR5K_INIT_SIFS_DEFAULT_BG 8
+#define AR5K_INIT_SIFS_DEFAULT_BG 10
#define AR5K_INIT_SIFS_DEFAULT_A 16
#define AR5K_INIT_SIFS_HALF_RATE 32
#define AR5K_INIT_SIFS_QUARTER_RATE 64
diff --git a/drivers/net/wireless/ath/ath5k/qcu.c
b/drivers/net/wireless/ath/ath5k/qcu.c
index 93abcfa..b18c502 100644
--- a/drivers/net/wireless/ath/ath5k/qcu.c
+++ b/drivers/net/wireless/ath/ath5k/qcu.c
@@ -519,7 +519,7 @@ int ath5k_hw_set_ifs_intervals(struct ath5k_hw *ah,
unsigned int slot_time)
return -EINVAL;
sifs = ath5k_hw_get_default_sifs(ah);
- sifs_clock = ath5k_hw_htoclock(ah, sifs);
+ sifs_clock = ath5k_hw_htoclock(ah, sifs - 2);
/* EIFS
* Txtime of ack at lowest rate + SIFS + DIFS
--
1.7.3.2
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