[PATCH v2 19/20] scsi: ibmvfc: fix nr_nvme_hw_queues module parameter ignored for NVMe queue sizing

[Tyrel Datwyler <tyreld@linux.ibm.com>]

max_nvme_queues was computed as min(IBMVFC_MAX_NVME_QUEUES, online_cpus),
silently ignoring the nr_nvme_hw_queues module parameter.  The SCSI path
correctly caps shost->nr_hw_queues with nr_scsi_hw_queues, but the NVMe
equivalent was never applied, making the 'nvme_host_queues' parameter a
no-op.

Apply the same pattern as the SCSI side: incorporate nr_nvme_hw_queues
into the max_nvme_queues calculation at probe time so that
nvme_scrqs.max_queues and nvme_scrqs.desired_queues both respect the
administrator-provided limit.

Fixes: 018fc3965291 ("scsi: ibmvfc: initialize NVMe channel configuration during driver probe")
Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com>
---
 drivers/scsi/ibmvscsi/ibmvfc-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ibmvscsi/ibmvfc-core.c b/drivers/scsi/ibmvscsi/ibmvfc-core.c
index 914dafd576a0..ca9a0437fc0c 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc-core.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc-core.c
@@ -6871,7 +6871,9 @@ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	int rc = -ENOMEM;
 	unsigned int online_cpus = num_online_cpus();
 	unsigned int max_scsi_queues = min_t(unsigned int, IBMVFC_MAX_SCSI_QUEUES, online_cpus);
-	unsigned int max_nvme_queues = min_t(unsigned int, IBMVFC_MAX_NVME_QUEUES, online_cpus);
+	unsigned int max_nvme_queues = min_t(unsigned int,
+					     min(IBMVFC_MAX_NVME_QUEUES, nr_nvme_hw_queues),
+					     online_cpus);
 
 	ENTER;
 	shost = scsi_host_alloc(&driver_template, sizeof(*vhost));
-- 
2.55.0