linux-kernel - [RFC 16/19] HSI: omap_ssi_port: ensure clocks are kept enabled during transfer

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Message-Id: <1466267229-25012-17-git-send-email-sre@kernel.org>
Date:	Sat, 18 Jun 2016 18:27:06 +0200
From:	Sebastian Reichel <sre@...nel.org>
To:	Sebastian Reichel <sre@...nel.org>, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Tony Lindgren <tony@...mide.com>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Pavel Machek <pavel@....cz>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Pali Rohár <pali.rohar@...il.com>
Subject: [RFC 16/19] HSI: omap_ssi_port: ensure clocks are kept enabled during transfer

ensure, that clocks remain enabled, when a transfer is started.

Signed-off-by: Sebastian Reichel <sre@...nel.org>
---
 drivers/hsi/controllers/omap_ssi_port.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hsi/controllers/omap_ssi_port.c b/drivers/hsi/controllers/omap_ssi_port.c
index aef5a8666d48..f91c6a4bb1a5 100644
--- a/drivers/hsi/controllers/omap_ssi_port.c
+++ b/drivers/hsi/controllers/omap_ssi_port.c
@@ -645,6 +645,7 @@ static void ssi_transfer(struct omap_ssi_port *omap_port,
 	struct hsi_msg *msg;
 	int err = -1;
 
+	pm_runtime_get(omap_port->pdev);
 	spin_lock_bh(&omap_port->lock);
 	while (err < 0) {
 		err = ssi_start_transfer(queue);
@@ -659,6 +660,7 @@ static void ssi_transfer(struct omap_ssi_port *omap_port,
 		}
 	}
 	spin_unlock_bh(&omap_port->lock);
+	pm_runtime_put(omap_port->pdev);
 }
 
 static void ssi_cleanup_queues(struct hsi_client *cl)
-- 
2.8.1