nvme-pci: acquire cq_poll_lock in nvme_poll_irqdisable

[ Upstream commit 3d893213 ]

We need to lock this queue for that condition because the timeout work
executes per-namespace and can poll the poll CQ.

Reported-by: Hannes Reinecke <hare@kernel.org>
Closes: https://lore.kernel.org/all/20240902130728.1999-1-hare@kernel.org/


Fixes: a0fa9647 ("NVMe: add blk polling support")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>