linux-kernel - [PATCH 4/6] wireless:libertas: do not confirm sleep if commands are pending

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Date:	Wed,  6 Jan 2016 22:08:12 +0100
From:	Andreas Kemnade <andreas@...nade.info>
To:	Kalle Valo <kvalo@...eaurora.org>,
	libertas-dev@...ts.infradead.org, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH 4/6] wireless:libertas: do not confirm sleep if commands are pending

If the main thread gets one PS AWAKE event and one PS SLEEP event
in one iteration over event_fifo there will never be checks for
commands to be processed, since psstate will always be
PS_STATE_SLEEP or PS_STATE_PRE_SLEEP

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 drivers/net/wireless/libertas/cmdresp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/libertas/cmdresp.c b/drivers/net/wireless/libertas/cmdresp.c
index 701125f..c95bf6d 100644
--- a/drivers/net/wireless/libertas/cmdresp.c
+++ b/drivers/net/wireless/libertas/cmdresp.c
@@ -257,6 +257,10 @@ int lbs_process_event(struct lbs_private *priv, u32 event)
 			       "EVENT: in FULL POWER mode, ignoring PS_SLEEP\n");
 			break;
 		}
+		if (!list_empty(&priv->cmdpendingq)) {
+			lbs_deb_cmd("EVENT: commands in queue, do not sleep\n");
+			break;
+		}
 		priv->psstate = PS_STATE_PRE_SLEEP;
 
 		lbs_ps_confirm_sleep(priv);
-- 
2.1.4

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