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| author | Keith Busch <kbusch@kernel.org> | 2024-08-26 20:20:57 +0200 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2024-08-27 16:55:40 +0200 |
| commit | 6f01bdbfef3b62955cf6503a8425d527b3a5cf94 (patch) | |
| tree | 7ce5f1a6acf7ec37a336167e0d7e57a48cf54e8f /drivers/nvme/host | |
| parent | nvmet-tcp: fix kernel crash if commands allocation fails (diff) | |
| download | linux-6f01bdbfef3b62955cf6503a8425d527b3a5cf94.tar.xz linux-6f01bdbfef3b62955cf6503a8425d527b3a5cf94.zip | |
nvme-pci: allocate tagset on reset if necessary
If a drive is unable to create IO queues on the initial probe, a
subsequent reset will need to allocate the tagset if IO queue creation
is successful. Without this, blk_mq_update_nr_hw_queues will crash on a
bad pointer due to the invalid tagset.
Fixes: eac3ef262941f62 ("nvme-pci: split the initial probe from the rest path")
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme/host')
| -rw-r--r-- | drivers/nvme/host/pci.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 6cd9395ba9ec..9026a730d5ed 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2508,6 +2508,12 @@ static unsigned int nvme_pci_nr_maps(struct nvme_dev *dev) static void nvme_pci_update_nr_queues(struct nvme_dev *dev) { + if (!dev->ctrl.tagset) { + nvme_alloc_io_tag_set(&dev->ctrl, &dev->tagset, &nvme_mq_ops, + nvme_pci_nr_maps(dev), sizeof(struct nvme_iod)); + return; + } + blk_mq_update_nr_hw_queues(&dev->tagset, dev->online_queues - 1); /* free previously allocated queues that are no longer usable */ nvme_free_queues(dev, dev->online_queues); |