linux-kernel - [PATCH 3/5] regulator: Support driver probe deferral

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Message-ID: <1317962127-29003-4-git-send-email-manjugk@ti.com>
Date:	Fri, 07 Oct 2011 10:05:25 +0500
From:	"G, Manjunath Kondaiah" <manjugk@...com>
To:	linux-arm-kernel@...ts.infradead.org
CC:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-omap@...r.kernel.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Dilan Lee <dilee@...dia.com>,
	Manjunath GKondaiah <manjunath.gkondaiah@...aro.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: [PATCH 3/5] regulator: Support driver probe deferral


From: Mark Brown <broonie@...nsource.wolfsonmicro.com>

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.

Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
[manjugk@...com: changed error value from EAGAIN to EPROBE_DEFER]
Signed-off-by: G, Manjunath Kondaiah <manjugk@...com>
Acked-by: Grant Likely <grant.likely@...retlab.ca>
Acked-by: Liam Girdwood <lrg@...com>
---
Cc: linux-omap@...r.kernel.org
Cc: linux-mmc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: Grant Likely <grant.likely@...retlab.ca>
Cc: Greg Kroah-Hartman <greg@...ah.com>
Cc: Dilan Lee <dilee@...dia.com>
Cc: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc: Manjunath GKondaiah <manjunath.gkondaiah@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>

 drivers/regulator/core.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index d8e6a42..95dfd21 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1153,7 +1153,7 @@ 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;
 
@@ -2668,7 +2668,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
 		if (!found) {
 			dev_err(dev, "Failed to find supply %s\n",
 				init_data->supply_regulator);
-			ret = -ENODEV;
+			ret = -EPROBE_DEFER;
 			goto scrub;
 		}
 
-- 
1.7.4.1

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