wl12xx: rearrange some ELP wake_up/sleep calls
ELP (Extremely/Enhanced Low Power, or something like that ;)) refers to
the powerstate of the 12xx chip, in which very low power is consumed,
and no commands (from the host) can be issued until the chip is woken up.
Wakeup/sleep commands must be protected by a wl->mutex, so it's generally
a good idea to call wakeup/sleep along with the mutex lock/unlock (where
needed). However, in some places the wl12xx driver calls wakeup/sleep in
some "inner" functions. This result in some "nested" wakeup/sleep calls
which might end up letting the chip go to sleep prematurely (e.g. during
event handling).
Fix it by rearranging the elp calls to come along with mutex_lock/unlock.
Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/wl12xx/event.c b/drivers/net/wireless/wl12xx/event.c
index 413d901..ae69330 100644
--- a/drivers/net/wireless/wl12xx/event.c
+++ b/drivers/net/wireless/wl12xx/event.c
@@ -33,6 +33,7 @@
{
struct delayed_work *dwork;
struct wl1271 *wl;
+ int ret;
dwork = container_of(work, struct delayed_work, work);
wl = container_of(dwork, struct wl1271, pspoll_work);
@@ -55,8 +56,13 @@
* delivery failure occurred, and no-one changed state since, so
* we should go back to powersave.
*/
+ ret = wl1271_ps_elp_wakeup(wl);
+ if (ret < 0)
+ goto out;
+
wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true);
+ wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
};
@@ -129,11 +135,6 @@
/* enable beacon early termination */
ret = wl1271_acx_bet_enable(wl, true);
- if (ret < 0)
- break;
-
- /* go to extremely low power mode */
- wl1271_ps_elp_sleep(wl);
break;
default:
break;
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 5545c3b..3f6517d 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -2792,32 +2792,31 @@
conf_tid->ack_policy = CONF_ACK_POLICY_LEGACY;
conf_tid->apsd_conf[0] = 0;
conf_tid->apsd_conf[1] = 0;
- } else {
- ret = wl1271_ps_elp_wakeup(wl);
- if (ret < 0)
- goto out;
+ goto out;
+ }
- /*
- * the txop is confed in units of 32us by the mac80211,
- * we need us
- */
- ret = wl1271_acx_ac_cfg(wl, wl1271_tx_get_queue(queue),
- params->cw_min, params->cw_max,
- params->aifs, params->txop << 5);
- if (ret < 0)
- goto out_sleep;
+ ret = wl1271_ps_elp_wakeup(wl);
+ if (ret < 0)
+ goto out;
- ret = wl1271_acx_tid_cfg(wl, wl1271_tx_get_queue(queue),
- CONF_CHANNEL_TYPE_EDCF,
- wl1271_tx_get_queue(queue),
- ps_scheme, CONF_ACK_POLICY_LEGACY,
- 0, 0);
- if (ret < 0)
- goto out_sleep;
+ /*
+ * the txop is confed in units of 32us by the mac80211,
+ * we need us
+ */
+ ret = wl1271_acx_ac_cfg(wl, wl1271_tx_get_queue(queue),
+ params->cw_min, params->cw_max,
+ params->aifs, params->txop << 5);
+ if (ret < 0)
+ goto out_sleep;
+
+ ret = wl1271_acx_tid_cfg(wl, wl1271_tx_get_queue(queue),
+ CONF_CHANNEL_TYPE_EDCF,
+ wl1271_tx_get_queue(queue),
+ ps_scheme, CONF_ACK_POLICY_LEGACY,
+ 0, 0);
out_sleep:
- wl1271_ps_elp_sleep(wl);
- }
+ wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
diff --git a/drivers/net/wireless/wl12xx/ps.c b/drivers/net/wireless/wl12xx/ps.c
index 971f13e..b8deada 100644
--- a/drivers/net/wireless/wl12xx/ps.c
+++ b/drivers/net/wireless/wl12xx/ps.c
@@ -149,9 +149,6 @@
case STATION_ACTIVE_MODE:
default:
wl1271_debug(DEBUG_PSM, "leaving psm");
- ret = wl1271_ps_elp_wakeup(wl);
- if (ret < 0)
- return ret;
/* disable beacon early termination */
ret = wl1271_acx_bet_enable(wl, false);
diff --git a/drivers/net/wireless/wl12xx/tx.c b/drivers/net/wireless/wl12xx/tx.c
index db9e47e..2019ed9 100644
--- a/drivers/net/wireless/wl12xx/tx.c
+++ b/drivers/net/wireless/wl12xx/tx.c
@@ -511,22 +511,14 @@
void wl1271_tx_work_locked(struct wl1271 *wl)
{
struct sk_buff *skb;
- bool woken_up = false;
u32 buf_offset = 0;
bool sent_packets = false;
int ret;
if (unlikely(wl->state == WL1271_STATE_OFF))
- goto out;
+ return;
while ((skb = wl1271_skb_dequeue(wl))) {
- if (!woken_up) {
- ret = wl1271_ps_elp_wakeup(wl);
- if (ret < 0)
- goto out_ack;
- woken_up = true;
- }
-
ret = wl1271_prepare_tx_frame(wl, skb, buf_offset);
if (ret == -EAGAIN) {
/*
@@ -573,18 +565,22 @@
wl1271_handle_tx_low_watermark(wl);
}
-
-out:
- if (woken_up)
- wl1271_ps_elp_sleep(wl);
}
void wl1271_tx_work(struct work_struct *work)
{
struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
+ int ret;
mutex_lock(&wl->mutex);
+ ret = wl1271_ps_elp_wakeup(wl);
+ if (ret < 0)
+ goto out;
+
wl1271_tx_work_locked(wl);
+
+ wl1271_ps_elp_wakeup(wl);
+out:
mutex_unlock(&wl->mutex);
}