From: Christoph Hellwig Date: Tue, 20 Nov 2018 15:57:54 +0000 (+0100) Subject: nvme: warn when finding multi-port subsystems without multipathing enabled X-Git-Tag: v5.15~7422^2~9^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=14a1336e6fff47dd1028b484d6c802105c58e2ee;p=platform%2Fkernel%2Flinux-starfive.git nvme: warn when finding multi-port subsystems without multipathing enabled 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 Reviewed-by: Sagi Grimberg --- diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index cee79cb..081cbdc 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -531,6 +531,9 @@ 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)