linux-kernel - [PATCH 1/2] spi: rockchip: Convert to late and early system PM callbacks

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Message-Id: <20171013100116.8271-1-jeffy.chen@rock-chips.com>
Date:   Fri, 13 Oct 2017 18:01:15 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     briannorris@...omium.org, dianders@...omium.org,
        Jeffy Chen <jeffy.chen@...k-chips.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/2] spi: rockchip: Convert to late and early system PM callbacks

Currently we are suspending the spi master in it's ->suspend callback,
which is racy as some other drivers may still want to transmit messages
on the bus(e.g. spi based pwm backlight).

Convert to late and early system PM callbacks to avoid the race.

Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

 drivers/spi/spi-rockchip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c
index fdcf3076681b..ae539c735ea6 100644
--- a/drivers/spi/spi-rockchip.c
+++ b/drivers/spi/spi-rockchip.c
@@ -914,7 +914,7 @@ static int rockchip_spi_runtime_resume(struct device *dev)
 #endif /* CONFIG_PM */
 
 static const struct dev_pm_ops rockchip_spi_pm = {
-	SET_SYSTEM_SLEEP_PM_OPS(rockchip_spi_suspend, rockchip_spi_resume)
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(rockchip_spi_suspend, rockchip_spi_resume)
 	SET_RUNTIME_PM_OPS(rockchip_spi_runtime_suspend,
 			   rockchip_spi_runtime_resume, NULL)
 };
-- 
2.11.0