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block-5.7-2020-05-16

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Merge tag 'block-5.7-2020-05-16' of git://git.kernel.dk/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
This commit is contained in:
Linus Torvalds 2020-05-16 13:24:41 -07:00
commit 3d1c1e5931
1 changed files with 5 additions and 0 deletions
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5
drivers/nvme/host/pci.c
View File

@ -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);
}