linux-kernel - [PATCH 3.13 069/163] iio:inkern: fix overwritten -EPROBE_DEFER in of_iio_channel_get_by

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Message-Id: <1412888588-26755-70-git-send-email-kamal@canonical.com>
Date:	Thu,  9 Oct 2014 14:01:34 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Johannes Pointner <johannes.pointner@...automation.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 069/163] iio:inkern: fix overwritten -EPROBE_DEFER in of_iio_channel_get_by_name

3.13.11.9 -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: Kamal Mostafa <kamal@...onical.com>
---
 drivers/iio/inkern.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 1e8e94d..4fc88e6 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -178,7 +178,7 @@ static struct iio_channel *of_iio_channel_get_by_name(struct device_node *np,
 			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",
-- 
1.9.1

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