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iio: adc: stmpe-adc: Fix wait_for_completion_timeout return value check
[ Upstream commit d345b23 ] wait_for_completion_timeout() returns unsigned long not long. it returns 0 if timed out, and positive if completed. The check for <= 0 is ambiguous and should be == 0 here indicating timeout which is the only error case Fixes: e813dde ("iio: stmpe-adc: Use wait_for_completion_timeout") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Reviewed-by: Philippe Schenker <philippe.schenker@toradex.com> Link: https://lore.kernel.org/r/20220412065150.14486-1-linmq006@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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