iio: Reject trailing garbage when parsing fixed point numbers
When parsing a fixed point number IIO stops parsing the string once it has reached the last requested decimal place. This means that the remainder of the string is silently accepted regardless, of whether it is part of a valid number or not. This patch modifies the code to scan the whole string and only accept valid numbers. Since fract_mult is 0 after the last decimal place any digit that may follows won't affect the result. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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