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wil6210: optimize wil_release_reorder_frames

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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>
This commit is contained in:
Vladimir Kondratiev 2014-05-27 14:45:50 +03:00 committed by John W. Linville
parent 39c52ee8cb
commit cf42c4e5d3
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/ath/wil6210/rx_reorder.c
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@ -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,