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nvmet: add ns tear down label for pt-cmd handling 

In the current implementation before submitting the passthru cmd we
may come across error e.g. getting ns from passthru controller,
allocating a request from passthru controller, etc. For all the failure
cases it only uses single goto label fail_out.

In the target code, we follow the pattern to have a separate label for
each error out the case when setting up multiple things before the actual
action.

This patch follows the same pattern and renames generic fail_out label
to out_put_ns and updates the error out cases in the
nvmet_passthru_execute_cmd() where it is needed.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chaitanya Kulkarni 2020-08-06 13:02:23 -07:00 committed by Jens Axboe
parent e398863b75
commit 4db69a3d7c
1 changed files with 5 additions and 4 deletions
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9
drivers/nvme/target/passthru.c
View File

@ -230,7 +230,7 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
if (unlikely(!ns)) {
pr_err("failed to get passthru ns nsid:%u\n", nsid);
status = NVME_SC_INVALID_NS | NVME_SC_DNR;
goto fail_out;
goto out;
}
q = ns->queue;
@ -240,14 +240,14 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
if (IS_ERR(rq)) {
rq = NULL;
status = NVME_SC_INTERNAL;
goto fail_out;
goto out_put_ns;
}
if (req->sg_cnt) {
ret = nvmet_passthru_map_sg(req, rq);
if (unlikely(ret)) {
status = NVME_SC_INTERNAL;
goto fail_out;
goto out_put_ns;
}
}
@ -274,9 +274,10 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
return;
fail_out:
out_put_ns:
if (ns)
nvme_put_ns(ns);
out:
nvmet_req_complete(req, status);
blk_put_request(rq);
}