Commit 397c699f authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe

nvme-pci: remove unnecessary completion doorbell check

The nvme pci driver never unmaps the doorbell registers while the requests
are active, so we can always safely update the completion queue head.
Signed-off-by: Keith Busch's avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
Reviewed-by: Sagi Grimberg's avatarSagi Grimberg <sagi@grimberg.me>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 0bc88192
......@@ -920,11 +920,9 @@ static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq)
{
u16 head = nvmeq->cq_head;
if (likely(nvmeq->cq_vector >= 0)) {
if (nvme_dbbuf_update_and_check_event(head, nvmeq->dbbuf_cq_db,
nvmeq->dbbuf_cq_ei))
writel(head, nvmeq->q_db + nvmeq->dev->db_stride);
}
if (nvme_dbbuf_update_and_check_event(head, nvmeq->dbbuf_cq_db,
nvmeq->dbbuf_cq_ei))
writel(head, nvmeq->q_db + nvmeq->dev->db_stride);
}
static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
......
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