tree 0566e2687e90c95bed3c8fdd69b3d82e817207c9
parent 06d2f6ca5a38abe92f1f3a132b331eee773868c3
author Linus Walleij <linus.walleij@linaro.org> 1438698109 +0200
committer Jonathan Cameron <jic23@kernel.org> 1439403982 +0100

iio: lsiio: fix error code handling error

commit acf50b3586f8d8a7530b905e111dda41876d38f4
"tools:iio:lsiio: add error handling"
introduced error handling of errors returned from
read_sysfs_string(), but with a simple if (retval),
missing the fact that these functions return a positive
value if the read was successful.

As a result lsiio regresses and does not show any
devices on my filesystem. Fix this by checking for
only negative error codes.

Cc: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>