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authorChristoph Hellwig <hch@lst.de>2018-11-20 16:57:54 +0100
committerChristoph Hellwig <hch@lst.de>2018-11-30 17:23:22 +0100
commit14a1336e6fff47dd1028b484d6c802105c58e2ee (patch)
tree75f6379c283a095ecc5ae4d0798df0694819986f /drivers
parent751a0cc0cd3a0d51e6aaf6fd3b8bd31f4ecfaf3e (diff)
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 <hch@lst.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nvme/host/nvme.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index cee79cb388af..081cbdcce880 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)