Factor out path deletion operation for one nvme_ctrlr into _bdev_nvme_delete().
_bdev_nvme_delete() traverses all remaining nvme_ctrlrs even after one
nvme_ctrlr was successfully deleted. To remember the successfule
deletion, use two return value variables, rc and _rc. For _rc returned by
_bdev_nvme_delete(), copy _rc to rc if _rc is zero, return _rc immediately
if _rc is not -ENXIO, or do nothing otherwise.
This improves the readability and makes us easier to add more changes.
Additionally, for _bdev_nvme_reset_io(), it is simpler to overwrite rc
to 0 if rc is -EBUSY rather than to return 0 if rc is -EBUSY. This is
very small change and hence done together.
Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Change-Id: I57eafd22918c8c976b9c51bedb9e4369976c1d5c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16819
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
422f5f3d11