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iwlegacy: add flush callback

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Dump implementation of flush, which just wait until all TX queues
become empty.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2012-12-20 14:31:51 +01:00 committed by John W. Linville
parent 93476b1e68
commit 70277f47b5
4 changed files with 39 additions and 0 deletions
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1
drivers/net/wireless/iwlegacy/3945-mac.c
View File

@ -3474,6 +3474,7 @@ struct ieee80211_ops il3945_mac_ops = {
.sta_add = il3945_mac_sta_add,
.sta_remove = il_mac_sta_remove,
.tx_last_beacon = il_mac_tx_last_beacon,
.flush = il_mac_flush,
};
static int

1
drivers/net/wireless/iwlegacy/4965-mac.c
View File

@ -6308,6 +6308,7 @@ const struct ieee80211_ops il4965_mac_ops = {
.sta_remove = il_mac_sta_remove,
.channel_switch = il4965_mac_channel_switch,
.tx_last_beacon = il_mac_tx_last_beacon,
.flush = il_mac_flush,
};
static int

36
drivers/net/wireless/iwlegacy/common.c
View File

@ -4707,6 +4707,42 @@ out:
}
EXPORT_SYMBOL(il_mac_change_interface);
void
il_mac_flush(struct ieee80211_hw *hw, bool drop)
{
struct il_priv *il = hw->priv;
unsigned long timeout = jiffies + msecs_to_jiffies(500);
int i;
mutex_lock(&il->mutex);
D_MAC80211("enter\n");
if (il->txq == NULL)
goto out;
for (i = 0; i < il->hw_params.max_txq_num; i++) {
struct il_queue *q;
if (i == il->cmd_queue)
continue;
q = &il->txq[i].q;
if (q->read_ptr == q->write_ptr)
continue;
if (time_after(jiffies, timeout)) {
IL_ERR("Failed to flush queue %d\n", q->id);
break;
}
msleep(20);
}
out:
D_MAC80211("leave\n");
mutex_unlock(&il->mutex);
}
EXPORT_SYMBOL(il_mac_flush);
/*
* On every watchdog tick we check (latest) time stamp. If it does not
* change during timeout period and queue is not empty we reset firmware.

1
drivers/net/wireless/iwlegacy/common.h
View File

@ -1723,6 +1723,7 @@ void il_mac_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif);
int il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum nl80211_iftype newtype, bool newp2p);
void il_mac_flush(struct ieee80211_hw *hw, bool drop);
int il_alloc_txq_mem(struct il_priv *il);
void il_free_txq_mem(struct il_priv *il);