[PATCH 2/2] nvme-fc: check sgl supported by target

[Max Gurtovoy]

SGLs support is mandatory for NVMe/tcp, make sure that the target is
aligned to the specification.

Signed-off-by: Max Gurtovoy <mgurtovoy at nvidia.com>
---
 drivers/nvme/host/fc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 6ffa8de2a0d7..03032d9b0573 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -3100,6 +3100,11 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl)
 	}
 
 	/* FC-NVME supports normal SGL Data Block Descriptors */
+	if (!(ctrl->ctrl.sgls & ((1 << 0) | (1 << 1)))) {
+		dev_err(ctrl->ctrl.device,
+			"Mandatory sgls are not supported!\n");
+		goto out_disconnect_admin_queue;
+	}
 
 	if (opts->queue_size > ctrl->ctrl.maxcmd) {
 		/* warn if maxcmd is lower than queue_size */
-- 
2.25.4