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ath9k: fix pending tx frames accounting

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Packets originally buffered for the regular hardware tx queues can end
up being transmitted through the U-APSD queue (via PS-Poll or U-APSD).
When packets are dropped due to retransmit failures, the pending frames
counter is not always updated properly.
Fix this by keeping track of the queue that a frame was accounted for in
the ath_frame_info struct, and using that on completion to decide
whether the counter should be updated.
This fixes some spurious transmit queue hangs.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2014-07-16 20:26:05 +02:00
committed by John W. Linville
parent d1d3799fcb
commit d954cd7700
2 changed files with 16 additions and 12 deletions
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3
drivers/net/wireless/ath/ath9k/ath9k.h
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@@ -182,7 +182,8 @@ struct ath_atx_ac {
struct ath_frame_info {
struct ath_buf *bf;
int framelen;
u16 framelen;
s8 txq;
enum ath9k_key_type keytype;
u8 keyix;
u8 rtscts_rate;