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nvme: warn when finding multi-port subsystems without multipathing enabled

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[ Upstream commit 14a1336e6f ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christoph Hellwig 2018-11-20 16:57:54 +01:00 committed by Greg Kroah-Hartman
parent 1f92564331
commit 1bda8b7996
1 changed files with 3 additions and 0 deletions
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3
drivers/nvme/host/nvme.h
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@ -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)