[PATCH 3.16.y-ckt 001/126] spi: sh-msiof: Add runtime PM lock in initializing

[Luis Henriques]

3.16.7-ckt5 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Hisashi Nakamura <hisashi.nakamura.ak at renesas.com>

commit 015760563ec77bf17cec712fa94afdf53b285287 upstream.

SH-MSIOF driver is enabled autosuspend API of spi framework.
But autosuspend framework doesn't work during initializing.
So runtime PM lock is added in SH-MSIOF driver initializing.

Fixes: e2a0ba547ba31c (spi: sh-msiof: Convert to spi core auto_runtime_pm framework)
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak at renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929 at gmail.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/spi/spi-sh-msiof.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 45b09142afe2..7f0f2ebf3cdc 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -421,6 +421,8 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
 	struct device_node	*np = spi->master->dev.of_node;
 	struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master);
 
+	pm_runtime_get_sync(&p->pdev->dev);
+
 	if (!np) {
 		/*
 		 * Use spi->controller_data for CS (same strategy as spi_gpio),
@@ -439,6 +441,9 @@ static int sh_msiof_spi_setup(struct spi_device *spi)
 	if (spi->cs_gpio >= 0)
 		gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH));
 
+
+	pm_runtime_put_sync(&p->pdev->dev);
+
 	return 0;
 }
 
-- 
2.1.4