From: Arik Nemtsov <arik@xxxxxxxxxx>
Print how much time a flush took. This will help debug the time it takes
to switch between channels.
Signed-off-by: Arik Nemtsov <arik@xxxxxxxxxx>
Signed-off-by: Luciano Coelho <luca@xxxxxxxxx>
---
drivers/net/wireless/ti/wlcore/tx.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/ti/wlcore/tx.c b/drivers/net/wireless/ti/wlcore/tx.c
index 24ac8ec..d89e0db 100644
--- a/drivers/net/wireless/ti/wlcore/tx.c
+++ b/drivers/net/wireless/ti/wlcore/tx.c
@@ -1076,9 +1076,10 @@ void wl12xx_tx_reset(struct wl1271 *wl)
/* caller must *NOT* hold wl->mutex */
void wl1271_tx_flush(struct wl1271 *wl)
{
- unsigned long timeout;
+ unsigned long timeout, start_time;
int i;
- timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
+ start_time = jiffies;
+ timeout = start_time + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
/* only one flush should be in progress, for consistent queue state */
mutex_lock(&wl->flush_mutex);
@@ -1087,19 +1088,23 @@ void wl1271_tx_flush(struct wl1271 *wl)
while (!time_after(jiffies, timeout)) {
mutex_lock(&wl->mutex);
- wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
+ wl1271_debug(DEBUG_MAC80211, "flushing tx buffer: %d %d",
wl->tx_frames_cnt,
wl1271_tx_total_queue_count(wl));
if ((wl->tx_frames_cnt == 0) &&
(wl1271_tx_total_queue_count(wl) == 0)) {
mutex_unlock(&wl->mutex);
+ wl1271_debug(DEBUG_MAC80211, "tx flush took %d ms",
+ jiffies_to_msecs(jiffies - start_time));
goto out;
}
mutex_unlock(&wl->mutex);
msleep(1);
}
- wl1271_warning("Unable to flush all TX buffers, timed out.");
+ wl1271_warning("Unable to flush all TX buffers, "
+ "timed out (timeout %d ms",
+ WL1271_TX_FLUSH_TIMEOUT / 1000);
/* forcibly flush all Tx buffers on our queues */
mutex_lock(&wl->mutex);
--
1.7.10.4
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