From 8f1b7eb11422d28fbc7432f0dee2f97aead09417 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 22 Oct 2012 12:15:00 +0100
Subject: iio: Do not accept multiple '.' in fixed point numbers

Currently when parsing a fix-point number we silently skip any additional '.'
found in the string.  E.g. '1.2.3.4' gets parsed as '1.234'. This patch
disallows this and returns an error if more than one '.' is encountered.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 37650a7..0994239 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -454,7 +454,7 @@ static ssize_t iio_write_channel_info(struct device *dev,
 				break;
 			else
 				return -EINVAL;
-		} else if (*buf == '.') {
+		} else if (*buf == '.' && integer_part) {
 			integer_part = false;
 		} else {
 			return -EINVAL;
-- 
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