On Wed, Mar 24, 2021 at 09:09:06PM +0100, Klaus Jensen wrote:
From: Klaus Jensen <k.jen...@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.jen...@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 403c8381a498..e84e43b2692d 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));
+    }
+}
+

Looks good to me!

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);
        }

        /*
--
2.31.0



Reviwed-by: Gollu Appalanaidu <anaidu.go...@samsung.com>


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