linux-kernel - [PATCH] regulator: Fix suspend to idle

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Date:   Tue, 30 Jan 2018 12:29:00 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Liam Girdwood <lgirdwood@...il.com>,
        Chunyan Zhang <zhang.chunyan@...aro.org>
Cc:     linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH] regulator: Fix suspend to idle

When suspending to idle with the new suspend mode configuration support
we go through the suspend callbacks with a state of PM_SUSPEND_TO_IDLE
which we don't have regulator constraints for, causing an error.  Avoid
this and similar errors by treating missing constraints as a noop.

Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>
Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/regulator/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 42681c10cbe4..dd4708c58480 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -758,7 +758,7 @@ static int suspend_set_state(struct regulator_dev *rdev,
 
 	rstate = regulator_get_suspend_state(rdev, state);
 	if (rstate == NULL)
-		return -EINVAL;
+		return 0;
 
 	/* If we have no suspend mode configration don't set anything;
 	 * only warn if the driver implements set_suspend_voltage or
-- 
2.15.1