nvme: zns: Simplify nvme_zone_parse_entry()

Instead of passing a pointer to a struct nvme_ctrl and a pointer to a
struct nvme_ns_head as the first two arguments of
nvme_zone_parse_entry(), pass only a pointer to a struct nvme_ns as both
the controller structure and ns head structure can be infered from the
namespace structure.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Author: damien-lemoal

drivers/nvme/host/zns.c

@@ -146,17 +146,16 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns,
 	return NULL;
 }
 
-static int nvme_zone_parse_entry(struct nvme_ctrl *ctrl,
-				 struct nvme_ns_head *head,
+static int nvme_zone_parse_entry(struct nvme_ns *ns,
 				 struct nvme_zone_descriptor *entry,
 				 unsigned int idx, report_zones_cb cb,
 				 void *data)
 {
+	struct nvme_ns_head *head = ns->head;
 	struct blk_zone zone = { };
 
 	if ((entry->zt & 0xf) != NVME_ZONE_TYPE_SEQWRITE_REQ) {
-		dev_err(ctrl->device, "invalid zone type %#x\n",
-				entry->zt);
+		dev_err(ns->ctrl->device, "invalid zone type %#x\n", entry->zt);
 		return -EINVAL;
 	}
 
@@ -213,8 +212,7 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector,
 			break;
 
 		for (i = 0; i < nz && zone_idx < nr_zones; i++) {
-			ret = nvme_zone_parse_entry(ns->ctrl, ns->head,
-						    &report->entries[i],
+			ret = nvme_zone_parse_entry(ns, &report->entries[i],
 						    zone_idx, cb, data);
 			if (ret)
 				goto out_free;