From: Christoph Hellwig <[email protected]> [ Upstream commit 14a1336e6fff47dd1028b484d6c802105c58e2ee ]
Without CONFIG_NVME_MULTIPATH enabled a multi-port subsystem might show up as invididual devices and cause problems, warn about it. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Sagi Grimberg <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- drivers/nvme/host/nvme.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index bb4a2003c097..60220de2db52 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -537,6 +537,9 @@ static inline void nvme_mpath_check_last_path(struct nvme_ns *ns) static inline int nvme_mpath_init(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) { + if (ctrl->subsys->cmic & (1 << 3)) + dev_warn(ctrl->device, +"Please enable CONFIG_NVME_MULTIPATH for full support of multi-port devices.\n"); return 0; } static inline void nvme_mpath_uninit(struct nvme_ctrl *ctrl) -- 2.17.1
