6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Keith Busch <kbusch@xxxxxxxxxx>
[ Upstream commit 6f01bdbfef3b62955cf6503a8425d527b3a5cf94 ]
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@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/nvme/host/pci.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 89e0798af780..7fc1ab4d9e7d 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2471,6 +2471,12 @@ 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);
--
2.43.0
