From 04bf30115f4ba2beda1efb6cfbae49cdc757f3a9 Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Sun, 11 Mar 2012 13:07:56 +0000
Subject: [PATCH] regulator: Support driver probe deferral
If we fail to locate a requested regulator return -EPROBE_DEFER. If drivers
pass this error code through to their caller (which they really should)
then this will ensure that the probe is retried later when further devices
become available. In the unusual case where a driver doesn't want this
it can override the default behaviour.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/regulator/core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e9a83f84adaf..fcde037b3461 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1210,7 +1210,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
{
struct regulator_dev *rdev;
struct regulator_map *map;
- struct regulator *regulator = ERR_PTR(-ENODEV);
+ struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
const char *devname = NULL;
int ret;
@@ -2834,7 +2834,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
if (!r) {
dev_err(dev, "Failed to find supply %s\n", supply);
- ret = -ENODEV;
+ ret = -EPROBE_DEFER;
goto scrub;
}
--
2.20.1