From aio_abi.h, io_event.res is defined __s64, negative
errno is assigned to io_event.res for error situation
in Linux Kernel.
But from libaio.h, io_event.res is defined unsigned long,
so convert it to signed value for error detection.
Fixes issue #2325
Change-Id: I99f8b03e8bfedfa260fe91f3e9e8ef0e5ecd0b77
Signed-off-by: Liu Xiaodong <xiaodong.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/12882
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
9be660eabd