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nvme: clean up nvme_scan_work 

Move the check for the supported CNS value into nvme_scan_ns_list, and
limit the life time of the identify controller allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-04-04 10:16:03 +02:00 committed by Jens Axboe
parent b9a5c3d4c3
commit 25dcaa9292
1 changed files with 8 additions and 8 deletions
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16
drivers/nvme/host/core.c
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@ -3738,6 +3738,9 @@ static int nvme_scan_ns_list(struct nvme_ctrl *ctrl, unsigned nn)
unsigned num_lists = DIV_ROUND_UP_ULL((u64)nn, 1024);
int ret = 0;
if (nvme_ctrl_limited_cns(ctrl))
return -EOPNOTSUPP;
ns_list = kzalloc(NVME_IDENTIFY_DATA_SIZE, GFP_KERNEL);
if (!ns_list)
return -ENOMEM;
@ -3824,17 +3827,14 @@ static void nvme_scan_work(struct work_struct *work)
if (nvme_identify_ctrl(ctrl, &id))
return;
nn = le32_to_cpu(id->nn);
kfree(id);
mutex_lock(&ctrl->scan_lock);
nn = le32_to_cpu(id->nn);
if (!nvme_ctrl_limited_cns(ctrl)) {
if (!nvme_scan_ns_list(ctrl, nn))
goto out_free_id;
}
nvme_scan_ns_sequential(ctrl, nn);
out_free_id:
if (nvme_scan_ns_list(ctrl, nn) != 0)
nvme_scan_ns_sequential(ctrl, nn);
mutex_unlock(&ctrl->scan_lock);
kfree(id);
down_write(&ctrl->namespaces_rwsem);
list_sort(NULL, &ctrl->namespaces, ns_cmp);
up_write(&ctrl->namespaces_rwsem);