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p54: implement flush callback

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Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2011-02-16 19:43:06 +01:00 committed by John W. Linville
parent 8b2988c13d
commit 0d4171e215
1 changed files with 43 additions and 0 deletions
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43
drivers/net/wireless/p54/main.c
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@ -524,6 +524,48 @@ static int p54_get_survey(struct ieee80211_hw *dev, int idx,
return 0;
}
static unsigned int p54_flush_count(struct p54_common *priv)
{
unsigned int total = 0, i;
BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats));
/*
* Because the firmware has the sole control over any frames
* in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they
* don't really count as pending or active.
*/
for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++)
total += priv->tx_stats[i].len;
return total;
}
static void p54_flush(struct ieee80211_hw *dev, bool drop)
{
struct p54_common *priv = dev->priv;
unsigned int total, i;
/*
* Currently, it wouldn't really matter if we wait for one second
* or 15 minutes. But once someone gets around and completes the
* TODOs [ancel stuck frames / reset device] in p54_work, it will
* suddenly make sense to wait that long.
*/
i = P54_STATISTICS_UPDATE * 2 / 20;
/*
* In this case no locking is required because as we speak the
* queues have already been stopped and no new frames can sneak
* up from behind.
*/
while ((total = p54_flush_count(priv) && i--)) {
/* waste time */
msleep(20);
}
WARN(total, "tx flush timeout, unresponsive firmware");
}
static const struct ieee80211_ops p54_ops = {
.tx = p54_tx_80211,
.start = p54_start,
@ -536,6 +578,7 @@ static const struct ieee80211_ops p54_ops = {
.sta_remove = p54_sta_add_remove,
.set_key = p54_set_key,
.config = p54_config,
.flush = p54_flush,
.bss_info_changed = p54_bss_info_changed,
.configure_filter = p54_configure_filter,
.conf_tx = p54_conf_tx,