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path: root/drivers/net/wireless/ath/ath9k/mac.h
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Diffstat (limited to 'drivers/net/wireless/ath/ath9k/mac.h')
-rw-r--r--drivers/net/wireless/ath/ath9k/mac.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/mac.h b/drivers/net/wireless/ath/ath9k/mac.h
index 6cc04951a05..0c87771383f 100644
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -86,9 +86,15 @@
#define ATH9K_TX_SW_ABORTED 0x40
#define ATH9K_TX_SW_FILTERED 0x80
+/* 64 bytes */
#define MIN_TX_FIFO_THRESHOLD 0x1
+
+/*
+ * Single stream device AR9285 and AR9271 require 2 KB
+ * to work around a hardware issue, all other devices
+ * have can use the max 4 KB limit.
+ */
#define MAX_TX_FIFO_THRESHOLD ((4096 / 64) - 1)
-#define INIT_TX_FIFO_THRESHOLD MIN_TX_FIFO_THRESHOLD
struct ath_tx_status {
u32 ts_tstamp;