Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
+5
+5
drivers/nvme/host/pci.c
+5
drivers/nvme/host/pci.c
···
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989
990
990
while (nvme_cqe_pending(nvmeq)) {
991
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found++;
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+
/*
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+
* load-load control dependency between phase and the rest of
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+
* the cqe requires a full read memory barrier
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+
*/
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+
dma_rmb();
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nvme_handle_cqe(nvmeq, nvmeq->cq_head);
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nvme_update_cq_head(nvmeq);
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}