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author | Yi Sun <yi.sun@unisoc.com> | 2024-01-29 16:52:50 +0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 13:26:30 +0100 |
commit | db48acce75d73dfe51c43d56893cce067b73cf08 (patch) | |
tree | 941a753f916c54e0c954380941008e12702a8e86 /drivers/usb/cdns3/cdns3-debug.h | |
parent | 0947d0d463d4e6fad75f3a3066613cb3d9689b26 (diff) |
virtio-blk: Ensure no requests in virtqueues before deleting vqs.
[ Upstream commit 4ce6e2db00de8103a0687fb0f65fd17124a51aaa ]
Ensure no remaining requests in virtqueues before resetting vdev and
deleting virtqueues. Otherwise these requests will never be completed.
It may cause the system to become unresponsive.
Function blk_mq_quiesce_queue() can ensure that requests have become
in_flight status, but it cannot guarantee that requests have been
processed by the device. Virtqueues should never be deleted before
all requests become complete status.
Function blk_mq_freeze_queue() ensure that all requests in virtqueues
become complete status. And no requests can enter in virtqueues.
Signed-off-by: Yi Sun <yi.sun@unisoc.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Link: https://lore.kernel.org/r/20240129085250.1550594-1-yi.sun@unisoc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-debug.h')
0 files changed, 0 insertions, 0 deletions