interruptible_wait_timeout returns a signed long, so make sure that we use a signed long to hold the result. Using an unsigned value would horribly misinterpet an error such as -ERESTARTSYS. CRs-Fixed: 341347 Change-Id: Ic0dedbadff2dbe404e68a2a78f6282b5976d05c1 Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>