[PATCH v3] hw/block/nvme: fix lbaf formats initialization

[Gollu Appalanaidu <anaidu.gollu@samsung.com>]

Currently LBAF formats are being intialized based on metadata
size if and only if nvme-ns "ms" parameter is non-zero value.
Since FormatNVM command being supported device parameter "ms"
may not be the criteria to initialize the supported LBAFs.

Signed-off-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
---
-v3: Remove "mset" constraint  check if ms < 8, "mset" can be
 set even when ms < 8 and non-zero.

-v2: Addressing review comments (Klaus)
 Change the current "pi" and "ms" constraint check such that it
 will throw the error if ms < 8 and if namespace protection info,
 location and metadata settings are set.
 Splitting this from compare fix patch series.

 hw/block/nvme-ns.c | 58 ++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 33 deletions(-)

diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c
index 7bb618f182..594b0003cf 100644
--- a/hw/block/nvme-ns.c
+++ b/hw/block/nvme-ns.c
@@ -85,38 +85,28 @@ static int nvme_ns_init(NvmeNamespace *ns, Error **errp)
     ds = 31 - clz32(ns->blkconf.logical_block_size);
     ms = ns->params.ms;
 
-    if (ns->params.ms) {
-        id_ns->mc = 0x3;
+    id_ns->mc = 0x3;
 
-        if (ns->params.mset) {
-            id_ns->flbas |= 0x10;
-        }
+    if (ms && ns->params.mset) {
+        id_ns->flbas |= 0x10;
+    }
 
-        id_ns->dpc = 0x1f;
-        id_ns->dps = ((ns->params.pil & 0x1) << 3) | ns->params.pi;
-
-        NvmeLBAF lbaf[16] = {
-            [0] = { .ds =  9           },
-            [1] = { .ds =  9, .ms =  8 },
-            [2] = { .ds =  9, .ms = 16 },
-            [3] = { .ds =  9, .ms = 64 },
-            [4] = { .ds = 12           },
-            [5] = { .ds = 12, .ms =  8 },
-            [6] = { .ds = 12, .ms = 16 },
-            [7] = { .ds = 12, .ms = 64 },
-        };
-
-        memcpy(&id_ns->lbaf, &lbaf, sizeof(lbaf));
-        id_ns->nlbaf = 7;
-    } else {
-        NvmeLBAF lbaf[16] = {
-            [0] = { .ds =  9 },
-            [1] = { .ds = 12 },
-        };
+    id_ns->dpc = 0x1f;
+    id_ns->dps = ((ns->params.pil & 0x1) << 3) | ns->params.pi;
 
-        memcpy(&id_ns->lbaf, &lbaf, sizeof(lbaf));
-        id_ns->nlbaf = 1;
-    }
+    NvmeLBAF lbaf[16] = {
+        [0] = { .ds =  9           },
+        [1] = { .ds =  9, .ms =  8 },
+        [2] = { .ds =  9, .ms = 16 },
+        [3] = { .ds =  9, .ms = 64 },
+        [4] = { .ds = 12           },
+        [5] = { .ds = 12, .ms =  8 },
+        [6] = { .ds = 12, .ms = 16 },
+        [7] = { .ds = 12, .ms = 64 },
+    };
+
+    memcpy(&id_ns->lbaf, &lbaf, sizeof(lbaf));
+    id_ns->nlbaf = 7;
 
     for (i = 0; i <= id_ns->nlbaf; i++) {
         NvmeLBAF *lbaf = &id_ns->lbaf[i];
@@ -395,10 +385,12 @@ static int nvme_ns_check_constraints(NvmeCtrl *n, NvmeNamespace *ns,
         return -1;
     }
 
-    if (ns->params.pi && ns->params.ms < 8) {
-        error_setg(errp, "at least 8 bytes of metadata required to enable "
-                   "protection information");
-        return -1;
+    if (ns->params.ms < 8) {
+        if (ns->params.pi || ns->params.pil) {
+            error_setg(errp, "at least 8 bytes of metadata required to enable "
+                    "protection information, protection information location");
+            return -1;
+        }
     }
 
     if (ns->params.nsid > NVME_MAX_NAMESPACES) {
-- 
2.17.1