[PATCH for-6.0 4/7] hw/block/nvme: fix controller namespaces array indexing

[Klaus Jensen <its@irrelevant.dk>]

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

The controller namespaces array being 0-indexed requires 'nsid - 1'
everywhere. Something that is easy to miss. Align the controller
namespaces array with the subsystem namespaces array such that both are
1-indexed.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.h | 8 ++++----
 hw/block/nvme.c | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 9edc86d79e98..c610ab30dc5c 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -217,7 +217,7 @@ typedef struct NvmeCtrl {
      * Attached namespaces to this controller.  If subsys is not given, all
      * namespaces in this list will always be attached.
      */
-    NvmeNamespace   *namespaces[NVME_MAX_NAMESPACES];
+    NvmeNamespace   *namespaces[NVME_MAX_NAMESPACES + 1];
     NvmeSQueue      **sq;
     NvmeCQueue      **cq;
     NvmeSQueue      admin_sq;
@@ -232,7 +232,7 @@ static inline NvmeNamespace *nvme_ns(NvmeCtrl *n, uint32_t nsid)
         return NULL;
     }
 
-    return n->namespaces[nsid - 1];
+    return n->namespaces[nsid];
 }
 
 static inline bool nvme_ns_is_attached(NvmeCtrl *n, NvmeNamespace *ns)
@@ -253,7 +253,7 @@ static inline void nvme_ns_attach(NvmeCtrl *n, NvmeNamespace *ns)
     uint32_t nsid = nvme_nsid(ns);
     assert(nsid && nsid <= NVME_MAX_NAMESPACES);
 
-    n->namespaces[nsid - 1] = ns;
+    n->namespaces[nsid] = ns;
 }
 
 static inline void nvme_ns_detach(NvmeCtrl *n, NvmeNamespace *ns)
@@ -261,7 +261,7 @@ static inline void nvme_ns_detach(NvmeCtrl *n, NvmeNamespace *ns)
     uint32_t nsid = nvme_nsid(ns);
     assert(nsid && nsid <= NVME_MAX_NAMESPACES);
 
-    n->namespaces[nsid - 1] = NULL;
+    n->namespaces[nsid] = NULL;
 }
 
 static inline NvmeCQueue *nvme_cq(NvmeRequest *req)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 6842b01ab58b..7a7e793c6c26 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -5909,7 +5909,7 @@ int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
             return -1;
         }
     } else {
-        if (n->namespaces[nsid - 1]) {
+        if (n->namespaces[nsid]) {
             error_setg(errp, "namespace id '%d' is already in use", nsid);
             return -1;
         }
-- 
2.31.0