diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 414473c19c..b4843d3bcf 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -4042,6 +4042,25 @@ static void nvme_ctrl_shutdown(NvmeCtrl *n)
     }
 }
 
+static void __nvme_select_ns_iocs(NvmeCtrl *n, NvmeNamespace *ns)
+{
+    ns->iocs = nvme_cse_iocs_none;
+    switch (ns->csi) {
+    case NVME_CSI_NVM:
+        if (NVME_CC_CSS(n->bar.cc) != NVME_CC_CSS_ADMIN_ONLY) {
+            ns->iocs = nvme_cse_iocs_nvm;
+        }
+        break;
+    case NVME_CSI_ZONED:
+        if (NVME_CC_CSS(n->bar.cc) == NVME_CC_CSS_CSI) {
+            ns->iocs = nvme_cse_iocs_zoned;
+        } else if (NVME_CC_CSS(n->bar.cc) == NVME_CC_CSS_NVM) {
+            ns->iocs = nvme_cse_iocs_nvm;
+        }
+        break;
+    }
+}
+
 static void nvme_select_ns_iocs(NvmeCtrl *n)
 {
     NvmeNamespace *ns;
@@ -4052,21 +4071,8 @@ static void nvme_select_ns_iocs(NvmeCtrl *n)
         if (!ns) {
             continue;
         }
-        ns->iocs = nvme_cse_iocs_none;
-        switch (ns->csi) {
-        case NVME_CSI_NVM:
-            if (NVME_CC_CSS(n->bar.cc) != NVME_CC_CSS_ADMIN_ONLY) {
-                ns->iocs = nvme_cse_iocs_nvm;
-            }
-            break;
-        case NVME_CSI_ZONED:
-            if (NVME_CC_CSS(n->bar.cc) == NVME_CC_CSS_CSI) {
-                ns->iocs = nvme_cse_iocs_zoned;
-            } else if (NVME_CC_CSS(n->bar.cc) == NVME_CC_CSS_NVM) {
-                ns->iocs = nvme_cse_iocs_nvm;
-            }
-            break;
-        }
+
+        __nvme_select_ns_iocs(n, ns);
     }
 }