[PATCH v2 09/16] nvme: factor out property/constraint checks

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.c | 43 ++++++++++++++++++++++++++++---------------
 1 file changed, 28 insertions(+), 15 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 44856e873fd1..5f9ebbd6a1d5 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1311,24 +1311,19 @@ static const MemoryRegionOps nvme_cmb_ops = {
     },
 };
 
-static void nvme_realize(PCIDevice *pci_dev, Error **errp)
+static void nvme_check_constraints(NvmeCtrl *n, Error **errp)
 {
-    NvmeCtrl *n = NVME(pci_dev);
-    NvmeIdCtrl *id = &n->id_ctrl;
+    NvmeParams *params = &n->params;
 
-    int i;
-    int64_t bs_size;
-    uint8_t *pci_conf;
-
-    if (n->params.num_queues) {
+    if (params->num_queues) {
         warn_report("num_queues is deprecated; please use max_ioqpairs "
                     "instead");
 
-        n->params.max_ioqpairs = n->params.num_queues - 1;
+        params->max_ioqpairs = params->num_queues - 1;
     }
 
-    if (n->params.max_ioqpairs < 1 ||
-        n->params.max_ioqpairs > PCI_MSIX_FLAGS_QSIZE) {
+    if (params->max_ioqpairs < 1 ||
+        params->max_ioqpairs > PCI_MSIX_FLAGS_QSIZE) {
         error_setg(errp, "max_ioqpairs must be between 1 and %d",
                    PCI_MSIX_FLAGS_QSIZE);
         return;
@@ -1339,16 +1334,34 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
         return;
     }
 
+    if (!params->serial) {
+        error_setg(errp, "serial property not set");
+        return;
+    }
+}
+
+static void nvme_realize(PCIDevice *pci_dev, Error **errp)
+{
+    NvmeCtrl *n = NVME(pci_dev);
+    NvmeIdCtrl *id = &n->id_ctrl;
+    Error *err = NULL;
+
+    int i;
+    int64_t bs_size;
+    uint8_t *pci_conf;
+
+    nvme_check_constraints(n, &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+
     bs_size = blk_getlength(n->conf.blk);
     if (bs_size < 0) {
         error_setg(errp, "could not get backing file size");
         return;
     }
 
-    if (!n->params.serial) {
-        error_setg(errp, "serial property not set");
-        return;
-    }
     blkconf_blocksizes(&n->conf);
     if (!blkconf_apply_backend_options(&n->conf, blk_is_read_only(n->conf.blk),
                                        false, errp)) {
-- 
2.26.0