nvmet: compare mqes and sqsize only for IO SQ

According to the NVMe Spec:
"
MQES: This field indicates the maximum individual queue size that the
controller supports. For NVMe over PCIe implementations, this value
applies to the I/O Submission Queues and I/O Completion Queues that the
host creates. For NVMe over Fabrics implementations, this value applies
to only the I/O Submission Queues that the host creates.
"

Align the target code to compare mqes and sqsize as mentioned in the
NVMe Spec.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index d8da840a1c0ed1e9c383d59c11227f7fddfe607d..4d014c5d0b6a71b1ac00c21128e4769399455ce9 100644 (file)
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -157,7 +157,8 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
                return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
        }
 
-       if (sqsize > mqes) {
+       /* for fabrics, this value applies to only the I/O Submission Queues */
+       if (qid && sqsize > mqes) {
                pr_warn("sqsize %u is larger than MQES supported %u cntlid %d\n",
                                sqsize, mqes, ctrl->cntlid);
                req->error_loc = offsetof(struct nvmf_connect_command, sqsize);