[PATCH] hw/block/nvme: refactor zone state check for read

[Klaus Jensen <its@irrelevant.dk>]

From: Gollu Appalanaidu <anaidu.gollu@samsung.com>

Align with nvme_check_zone_write.

Remove unnecessary storing status value and return at the end of the
function, if error occurs return immediately if applicable.

Signed-off-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
Reviewed-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 8ac997735041..1dbd6ec129ae 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1210,7 +1210,7 @@ static uint16_t nvme_check_zone_write(NvmeCtrl *n, NvmeNamespace *ns,
 
 static uint16_t nvme_check_zone_state_for_read(NvmeZone *zone)
 {
-    uint16_t status;
+    uint64_t zslba = zone->d.zslba;
 
     switch (nvme_get_zone_state(zone)) {
     case NVME_ZONE_STATE_EMPTY:
@@ -1219,16 +1219,13 @@ static uint16_t nvme_check_zone_state_for_read(NvmeZone *zone)
     case NVME_ZONE_STATE_FULL:
     case NVME_ZONE_STATE_CLOSED:
     case NVME_ZONE_STATE_READ_ONLY:
-        status = NVME_SUCCESS;
-        break;
+        return NVME_SUCCESS;
     case NVME_ZONE_STATE_OFFLINE:
-        status = NVME_ZONE_OFFLINE;
-        break;
+        trace_pci_nvme_err_zone_is_offline(zslba);
+        return NVME_ZONE_OFFLINE;
     default:
         assert(false);
     }
-
-    return status;
 }
 
 static uint16_t nvme_check_zone_read(NvmeNamespace *ns, uint64_t slba,
@@ -1241,10 +1238,10 @@ static uint16_t nvme_check_zone_read(NvmeNamespace *ns, uint64_t slba,
 
     status = nvme_check_zone_state_for_read(zone);
     if (status) {
-        ;
+        return status;
     } else if (unlikely(end > bndry)) {
         if (!ns->params.cross_zone_read) {
-            status = NVME_ZONE_BOUNDARY_ERROR;
+            return NVME_ZONE_BOUNDARY_ERROR;
         } else {
             /*
              * Read across zone boundary - check that all subsequent
@@ -1254,7 +1251,7 @@ static uint16_t nvme_check_zone_read(NvmeNamespace *ns, uint64_t slba,
                 zone++;
                 status = nvme_check_zone_state_for_read(zone);
                 if (status) {
-                    break;
+                    return status;
                 }
             } while (end > nvme_zone_rd_boundary(ns, zone));
         }
-- 
2.30.0