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nvme: refactor ns->ctrl by request

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Just for current code in nvme_cleanup_cmd(), we don't have to get
namespace instance, but we need controller instance.

Controller instance can be retrieved by namespace instance, but it can
be directly accessed by nvme_request instance from request.

	ctrl = nvme_req(req)->ctrl;

We don't have to go around namespace instance from request instance
through gendisk.

Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Minwoo Im 2021-01-13 23:36:27 +09:00 committed by Christoph Hellwig
parent 0dc9edaf80
commit fc97e942d9
1 changed files with 3 additions and 3 deletions
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6
drivers/nvme/host/core.c
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@ -841,11 +841,11 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
void nvme_cleanup_cmd(struct request *req)
{
if (req->rq_flags & RQF_SPECIAL_PAYLOAD) {
struct nvme_ns *ns = req->rq_disk->private_data;
struct nvme_ctrl *ctrl = nvme_req(req)->ctrl;
struct page *page = req->special_vec.bv_page;
if (page == ns->ctrl->discard_page)
clear_bit_unlock(0, &ns->ctrl->discard_page_busy);
if (page == ctrl->discard_page)
clear_bit_unlock(0, &ctrl->discard_page_busy);
else
kfree(page_address(page) + req->special_vec.bv_offset);
}