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nvme fixes for Linux 6.1

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- fix SRCU protection of nvme_ns_head list (Caleb Sander)
  - clear the prp2 field when not used (Lei Rao)
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Merge tag 'nvme-6.1-2022-01-02' of git://git.infradead.org/nvme into block-6.1

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.1

 - fix SRCU protection of nvme_ns_head list (Caleb Sander)
 - clear the prp2 field when not used (Lei Rao)"

* tag 'nvme-6.1-2022-01-02' of git://git.infradead.org/nvme:
  nvme: fix SRCU protection of nvme_ns_head list
  nvme-pci: clear the prp2 field when not used
This commit is contained in:
Jens Axboe 2022-12-02 08:01:06 -07:00
commit d0f411c0b9
3 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/nvme/host/core.c
View File

@ -4304,7 +4304,7 @@ static void nvme_ns_remove(struct nvme_ns *ns)
mutex_unlock(&ns->ctrl->subsys->lock);
/* guarantee not available in head->list */
synchronize_rcu();
synchronize_srcu(&ns->head->srcu);
if (!nvme_ns_head_multipath(ns->head))
nvme_cdev_del(&ns->cdev, &ns->cdev_device);

3
drivers/nvme/host/multipath.c
View File

@ -174,11 +174,14 @@ void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
struct nvme_ns_head *head = ns->head;
sector_t capacity = get_capacity(head->disk);
int node;
int srcu_idx;
srcu_idx = srcu_read_lock(&head->srcu);
list_for_each_entry_rcu(ns, &head->list, siblings) {
if (capacity != get_capacity(ns->disk))
clear_bit(NVME_NS_READY, &ns->flags);
}
srcu_read_unlock(&head->srcu, srcu_idx);
for_each_node(node)
rcu_assign_pointer(head->current_path[node], NULL);

2
drivers/nvme/host/pci.c
View File

@ -797,6 +797,8 @@ static blk_status_t nvme_setup_prp_simple(struct nvme_dev *dev,
cmnd->dptr.prp1 = cpu_to_le64(iod->first_dma);
if (bv->bv_len > first_prp_len)
cmnd->dptr.prp2 = cpu_to_le64(iod->first_dma + first_prp_len);
else
cmnd->dptr.prp2 = 0;
return BLK_STS_OK;
}