[ Upstream commitc55c7a85e0] The subsequent call to os_set_fd_block() overwrites the previous return value. OR the two return values together to fix it. Fixes:f88f0bdfc3("um: UBD Improvements") Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com> Link: https://patch.msgid.link/20250606124428.148164-2-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>