From: Klaus Jensen <k.jensen@samsung.com>
Date: Tue, 23 Mar 2021 21:42:56 +0000 (+0100)
Subject: hw/block/nvme: update dmsrl limit on namespace detachment
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=9b8671ed43eed95e43ea97528e761810177d09a3;p=qmiga%2Fqemu.git

hw/block/nvme: update dmsrl limit on namespace detachment

The Non-MDTS DMSRL limit must be recomputed when namespaces are
detached.

Fixes: 645ce1a70cb6 ("hw/block/nvme: support namespace attachment command")
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Gollu Appalanaidu <anaidu.gollu@samsung.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
---

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 5911adcf57..0e5ba27c46 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -4868,6 +4868,21 @@ static uint16_t nvme_aer(NvmeCtrl *n, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
+static void nvme_update_dmrsl(NvmeCtrl *n)
+{
+    int nsid;
+
+    for (nsid = 1; nsid <= NVME_MAX_NAMESPACES; nsid++) {
+        NvmeNamespace *ns = nvme_ns(n, nsid);
+        if (!ns) {
+            continue;
+        }
+
+        n->dmrsl = MIN_NON_ZERO(n->dmrsl,
+                                BDRV_REQUEST_MAX_BYTES / nvme_l2b(ns, 1));
+    }
+}
+
 static void __nvme_select_ns_iocs(NvmeCtrl *n, NvmeNamespace *ns);
 static uint16_t nvme_ns_attachment(NvmeCtrl *n, NvmeRequest *req)
 {
@@ -4917,6 +4932,8 @@ static uint16_t nvme_ns_attachment(NvmeCtrl *n, NvmeRequest *req)
             }
 
             nvme_ns_detach(ctrl, ns);
+
+            nvme_update_dmrsl(ctrl);
         }
 
         /*