Keith Busch b69e2ef24b nvme-pci: dma read memory barrier for completions ... Control dependencies do not guarantee load order across the condition, allowing a CPU to predict and speculate memory reads. Commit 324b494c28 inlined verifying a new completion with its handling. At least one architecture was observed to access the contents out of order, resulting in the driver using stale data for the completion. Add a dma read barrier before reading the completion queue entry and after the condition its contents depend on to ensure the read order is determinsitic. Reported-by: John Garry <john.garry@huawei.com> Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Keith Busch <kbusch@kernel.org> Tested-by: John Garry <john.garry@huawei.com> Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>		2020-05-12 18:02:24 +02:00
..
core.c	nvme: fix possible hang when ns scanning fails during error recovery	2020-05-09 16:07:58 -06:00
fabrics.c	nvme-fabrics: Use scnprintf() for avoiding potential buffer overflow	2020-03-26 04:51:55 +09:00
fabrics.h	nvme: Remove ADMIN_ONLY state	2019-10-14 23:21:44 +09:00
fault_inject.c	nvme: enable to inject errors into admin commands	2019-06-21 11:15:50 +02:00
fc.c	nvme-fc: Revert "add module to ops template to allow module references"	2020-04-04 09:09:39 +02:00
hwmon.c	nvme: hwmon: switch to use <linux/units.h> helpers	2020-01-31 10:30:40 -08:00
Kconfig	nvme: Don't deter users from enabling hwmon support	2020-03-26 04:45:25 +09:00
lightnvm.c	lightnvm: move metadata mapping to lower level driver	2019-08-06 08:20:10 -06:00
Makefile	nvme: Add hardware monitoring support	2019-11-12 01:57:35 +09:00
multipath.c	nvme: fix deadlock caused by ANA update wrong locking	2020-04-04 09:07:03 +02:00
nvme.h	nvme: Fix controller creation races with teardown flow	2020-03-26 04:51:56 +09:00
pci.c	nvme-pci: dma read memory barrier for completions	2020-05-12 18:02:24 +02:00
rdma.c	block-5.7-2020-04-10	2020-04-10 10:06:54 -07:00
tcp.c	nvme-tcp: fix possible crash in recv error flow	2020-04-01 11:07:13 +02:00
trace.c	nvme: trace: parse Get LBA Status command in detail	2019-08-29 12:55:01 -07:00
trace.h	nvme-trace: print result and status in hex format	2019-06-21 11:12:37 +02:00