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authorAdam Thomson <Adam.Thomson.Opensource@diasemi.com>2014-11-06 15:11:00 +0300
committerJonathan Cameron <jic23@kernel.org>2014-06-21 15:31:38 +0400
commita2c12493ed7e63a18cef33a71686d12ffcd6600e (patch)
treeaf4d43b6129b5184fe2bf620cdfd4a52e960ab4b /drivers/iio/inkern.c
parentb70e19c222a64018d308ebc80333575aff9f4e51 (diff)
downloadlinux-a2c12493ed7e63a18cef33a71686d12ffcd6600e.tar.xz
iio: of_iio_channel_get_by_name() returns non-null pointers for error legs
Currently in the inkern.c code for IIO framework, the function of_iio_channel_get_by_name() will return a non-NULL pointer when it cannot find a channel using of_iio_channel_get() and when it tries to search for 'io-channel-ranges' property and fails. This is incorrect behaviour as the function which calls this expects a NULL pointer for failure. This patch rectifies the issue. Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org> Cc: Stable@vger.kernel.org
Diffstat (limited to 'drivers/iio/inkern.c')
-rw-r--r--drivers/iio/inkern.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index d833d55052ea..c7497009d60a 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -183,7 +183,7 @@ static struct iio_channel *of_iio_channel_get_by_name(struct device_node *np,
else if (name && index >= 0) {
pr_err("ERROR: could not get IIO channel %s:%s(%i)\n",
np->full_name, name ? name : "", index);
- return chan;
+ return NULL;
}
/*
@@ -193,8 +193,9 @@ static struct iio_channel *of_iio_channel_get_by_name(struct device_node *np,
*/
np = np->parent;
if (np && !of_get_property(np, "io-channel-ranges", NULL))
- break;
+ return NULL;
}
+
return chan;
}
@@ -317,6 +318,7 @@ struct iio_channel *iio_channel_get(struct device *dev,
if (channel != NULL)
return channel;
}
+
return iio_channel_get_sys(name, channel_name);
}
EXPORT_SYMBOL_GPL(iio_channel_get);