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[ Upstream commit cd8db057e93ddaacbec025b567490555d2bca280 ] Make sure to detect short transfers when reading a device register. The modem-status handling had sufficient error checks in place, but move handling of short transfers into the register accessor function itself for consistency. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>