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nvme-multipath: set bdi capabilities once

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[ Upstream commit b2ce4d9069 ]

The queues' backing device info capabilities don't change with each
namespace revalidation. Set it only when each path's request_queue
is initially added to a multipath queue.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Keith Busch
2020-04-09 09:09:04 -07:00
committed by Greg Kroah-Hartman
parent 34035e7842
commit 0d70b94ffc
1 changed files with 8 additions and 0 deletions
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8
drivers/nvme/host/multipath.c
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@@ -11,6 +11,7 @@
* more details.
*/
#include <linux/backing-dev.h>
#include <linux/moduleparam.h>
#include <trace/events/block.h>
#include "nvme.h"
@@ -521,6 +522,13 @@ void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id)
nvme_mpath_set_live(ns);
mutex_unlock(&ns->head->lock);
}
if (bdi_cap_stable_pages_required(ns->queue->backing_dev_info)) {
struct backing_dev_info *info =
ns->head->disk->queue->backing_dev_info;
info->capabilities |= BDI_CAP_STABLE_WRITES;
}
}
void nvme_mpath_remove_disk(struct nvme_ns_head *head)