linux-kernel - [PATCH 3.10 085/143] iio:inkern: fix overwritten -EPROBE_DEFER in of_iio_channel_get_by

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Date:	Fri,  3 Oct 2014 14:34:40 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Johannes Pointner <johannes.pointner@...automation.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Cameron <jic23@...nel.org>
Subject: [PATCH 3.10 085/143] iio:inkern: fix overwritten -EPROBE_DEFER in of_iio_channel_get_by_name

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

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

From: Johannes Pointner <johannes.pointner@...il.com>

commit 872687f626e033b4ddfaec1e410057cfc6636d77 upstream.

Fixes: a2c12493ed7e ('iio: of_iio_channel_get_by_name() returns non-null pointers for error legs')

which improperly assumes that of_iio_channel_get_by_name must always
return NULL and thus now hides -EPROBE_DEFER.

Signed-off-by: Johannes Pointner <johannes.pointner@...automation.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Jonathan Cameron <jic23@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -178,7 +178,7 @@ static struct iio_channel *of_iio_channe
 			index = of_property_match_string(np, "io-channel-names",
 							 name);
 		chan = of_iio_channel_get(np, index);
-		if (!IS_ERR(chan))
+		if (!IS_ERR(chan) || PTR_ERR(chan) == -EPROBE_DEFER)
 			break;
 		else if (name && index >= 0) {
 			pr_err("ERROR: could not get IIO channel %s:%s(%i)\n",


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