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nvme-pci: do not try to add queue maps at runtime

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The block layer allocates the set's maps once. We can't add special
purpose queues at runtime if they weren't allocated at initialization
time.

Tested-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Keith Busch 2026-02-10 10:38:09 -08:00
parent 4735b510a0
commit baa47c4f89
1 changed files with 12 additions and 0 deletions
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12
drivers/nvme/host/pci.c
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@ -2902,6 +2902,18 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
dev->nr_write_queues = write_queues;
dev->nr_poll_queues = poll_queues;
if (dev->ctrl.tagset) {
/*
* The set's maps are allocated only once at initialization
* time. We can't add special queues later if their mq_map
* wasn't preallocated.
*/
if (dev->ctrl.tagset->nr_maps < 3)
dev->nr_poll_queues = 0;
if (dev->ctrl.tagset->nr_maps < 2)
dev->nr_write_queues = 0;
}
/*
* The initial number of allocated queue slots may be too large if the
* user reduced the special queue parameters. Cap the value to the