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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-05-16 13:24:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-05-16 13:24:41 -0700 |
| commit | 3d1c1e5931ce45b3a3f309385bbc00c78e9951c6 (patch) | |
| tree | 39514214185b9c50678301e7c3f9436a7ffd44a6 | |
| parent | cf0ca701a01cf631333855831fe48b717ed1f20b (diff) | |
| parent | 3948955397511ad5b68dc65fa11fad941d71d307 (diff) | |
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
| -rw-r--r-- | drivers/nvme/host/pci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index e13c370de830..3726dc780d15 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -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); } |