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nvme: fix namespace removal list

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[ Upstream commit ff0ffe5b7c ]

This function wants to move a subset of a list from one element to the
tail into another list. It also needs to use the srcu synchronize
instead of the regular rcu version. Do this one element at a time
because that's the only to do it.

Fixes: be647e2c76 ("nvme: use srcu for iterating namespace list")
Reported-by: Venkat Rao Bagalkote <venkat88@linux.vnet.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.vnet.ibm.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Keith Busch 2024-06-13 09:36:50 -07:00 committed by Greg Kroah-Hartman
parent 6019283e1e
commit 9c375a9566
1 changed files with 5 additions and 4 deletions
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9
drivers/nvme/host/core.c
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@ -3810,12 +3810,13 @@ static void nvme_remove_invalid_namespaces(struct nvme_ctrl *ctrl,
mutex_lock(&ctrl->namespaces_lock);
list_for_each_entry_safe(ns, next, &ctrl->namespaces, list) {
if (ns->head->ns_id > nsid)
list_splice_init_rcu(&ns->list, &rm_list,
synchronize_rcu);
if (ns->head->ns_id > nsid) {
list_del_rcu(&ns->list);
synchronize_srcu(&ctrl->srcu);
list_add_tail_rcu(&ns->list, &rm_list);
}
}
mutex_unlock(&ctrl->namespaces_lock);
synchronize_srcu(&ctrl->srcu);
list_for_each_entry_safe(ns, next, &rm_list, list)
nvme_ns_remove(ns);