[PATCH] nvmet: use U32_MAX value to report NN

[Chaitanya Kulkarni]

On 6/14/21 14:19, Keith Busch wrote:
> On Mon, Jun 14, 2021 at 12:47:12PM -0700, Chaitanya Kulkarni wrote:
>> @@ -393,7 +393,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
>>  	/* no enforcement soft-limit for maxcmd - pick arbitrary high value */
>>  	id->maxcmd = cpu_to_le16(NVMET_MAX_CMD);
>>  
>> -	id->nn = cpu_to_le32(ctrl->subsys->max_nsid);
>> +	id->nn = cpu_to_le32(U32_MAX);
> The NN field has to have the highest valid NSID, and FFFFFFFFh is not
> valid. That's reserved for the broadcast.
>

In that case we have to keep the dynamic id setting for the MNAN and
may have to keep the original proposed fix :-

 drivers/nvme/target/admin-cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/target/admin-cmd.c
b/drivers/nvme/target/admin-cmd.c
index cd60a8184d04..a8ec377bb68d 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -394,7 +394,7 @@ static void nvmet_execute_identify_ctrl(struct
nvmet_req *req)
        id->maxcmd = cpu_to_le16(NVMET_MAX_CMD);
 
        id->nn = cpu_to_le32(ctrl->subsys->max_nsid);
-       id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES);
+       id->mnan = cpu_to_le32(ctrl->subsys->max_nsid);
        id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM |
                        NVME_CTRL_ONCS_WRITE_ZEROES);
 
-- 
2.22.1