diff options
| author | Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> | 2014-05-27 14:45:50 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-05-29 13:10:32 -0400 |
| commit | cf42c4e5d3019d801ec6d033b63de5446a53af5c (patch) | |
| tree | 012cf18eb22e33250c74eff31a55eabccf2fbc66 | |
| parent | 39c52ee8cb6d473dda6c33431339ca2bc984d66d (diff) | |
wil6210: optimize wil_release_reorder_frames
In case of receiving frame with sequence number far greater than current,
wil_release_reorder_frames() will iterate many times over empty buffer.
Optimize this case by checking buffer emptiness and simply update
head_seq_num without iterating.
Suggested-by: Vladimir Shulman <Vladimir.Shulman@Wilocity.com>
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/rx_reorder.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/wil6210/rx_reorder.c b/drivers/net/wireless/ath/wil6210/rx_reorder.c index ec29954bd44d..747ae1275877 100644 --- a/drivers/net/wireless/ath/wil6210/rx_reorder.c +++ b/drivers/net/wireless/ath/wil6210/rx_reorder.c @@ -49,10 +49,17 @@ static void wil_release_reorder_frames(struct wil6210_priv *wil, { int index; - while (seq_less(r->head_seq_num, hseq)) { + /* note: this function is never called with + * hseq preceding r->head_seq_num, i.e it is always true + * !seq_less(hseq, r->head_seq_num) + * and thus on loop exit it should be + * r->head_seq_num == hseq + */ + while (seq_less(r->head_seq_num, hseq) && r->stored_mpdu_num) { index = reorder_index(r, r->head_seq_num); wil_release_reorder_frame(wil, r, index); } + r->head_seq_num = hseq; } static void wil_reorder_release(struct wil6210_priv *wil, |