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ath: fix DFS timestamp wraparound reset condition 

The DFS pattern detector ought to reset the
detector lines when a pulse is added with
lower time stamp than the previous (which
indicates a TSF restart).

This did not work so far and is fixed with
this patch.

The modification does not change detection
performance within the driver, since it
only ensures early reset (which is later
performed by the PRI detectors anyway).
It is relevant for synthetic tests and
statistical evaluations, where millions
of pulse patterns are processed and an
early reset helps reducing load.

Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Zefir Kurtisi 2015-09-29 12:29:49 +02:00 committed by Kalle Valo
parent 101d1f7fbf
commit 706452b068
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/ath/dfs_pattern_detector.c
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@ -284,10 +284,10 @@ dpd_add_pulse(struct dfs_pattern_detector *dpd, struct pulse_event *event)
if (cd == NULL)
return false;
dpd->last_pulse_ts = event->ts;
/* reset detector on time stamp wraparound, caused by TSF reset */
if (event->ts < dpd->last_pulse_ts)
dpd_reset(dpd);
dpd->last_pulse_ts = event->ts;
/* do type individual pattern matching */
for (i = 0; i < dpd->num_radar_types; i++) {