tree 353fe58930f0fa92f65dbdc0f8855697680965a7
parent bdc8cda1d010887c06bd8c29564b74cd61ec0a7b
author Jonathan Cameron <jic23@kernel.org> 1388786520 +0000
committer Jonathan Cameron <jic23@kernel.org> 1393796728 +0000

iio:adc:vf610 ensure correct handing of interruption of wait for completion

Issue highlighted by smatch warning:

CHECK   drivers/iio/adc/vf610_adc.c
drivers/iio/adc/vf610_adc.c:466 vf610_read_raw() warn: unsigned 'ret' is never less than zero.

As wait_for_completion_interruptible_timeout can return -ERESTARTSTSYS, if
interrupted, ret must be signed.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Fugang Duan <B38611@freescale.com>