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[PATCH for-6.0 v2 6/8] hw/block/nvme: update dmsrl limit on namespace de


From: Klaus Jensen
Subject: [PATCH for-6.0 v2 6/8] hw/block/nvme: update dmsrl limit on namespace detachment
Date: Mon, 5 Apr 2021 19:54:50 +0200

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

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>
---
 hw/block/nvme.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index de0e726dfdd8..3dc51f407671 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -4876,6 +4876,21 @@ 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)
 {
@@ -4925,6 +4940,8 @@ static uint16_t nvme_ns_attachment(NvmeCtrl *n, 
NvmeRequest *req)
             }
 
             nvme_ns_detach(ctrl, ns);
+
+            __nvme_update_dmrsl(ctrl);
         }
 
         /*
-- 
2.31.1




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