Commit 3d1c1e59 authored May 16, 2020 by Linus Torvalds

linux-block

Pull block fix from Jens Axboe:
 "Just a single NVMe pull in here, with a single fix for a missing DMA
  read memory barrier for completions"

* tag 'block-5.7-2020-05-16' of git://git.kernel.dk/linux-block:
  nvme-pci: dma read memory barrier for completions

parents cf0ca701 39489553

drivers/nvme/host/pci.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -989,6 +989,11 @@ static inline int nvme_process_cq(struct nvme_queue *nvmeq)

		while (nvme_cqe_pending(nvmeq)) {
		found++;
		/*
		* load-load control dependency between phase and the rest of
		* the cqe requires a full read memory barrier
		*/
		dma_rmb();
		nvme_handle_cqe(nvmeq, nvmeq->cq_head);
		nvme_update_cq_head(nvmeq);
		}

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