nvme: cancel request synchronously
authorMing Lei <ming.lei@redhat.com>
Mon, 8 Apr 2019 22:31:22 +0000 (06:31 +0800)
committerJens Axboe <axboe@kernel.dk>
Wed, 10 Apr 2019 15:57:35 +0000 (09:57 -0600)
commiteb3afb75b57c28599af0dfa03a99579d410749e9
treea56b6352e2f032e0ff91a73f58917bd7cbae7f26
parent1b8f21b74c3c9c82fce5a751d7aefb7cc0b8d33d
nvme: cancel request synchronously

nvme_cancel_request() is used in error handler, and it is always
reliable to cancel request synchronously, and avoids possible race
in which request may be completed after real hw queue is destroyed.

One issue is reported by our customer on NVMe RDMA, in which freed ib
queue pair may be used in nvme_rdma_complete_rq().

Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: James Smart <james.smart@broadcom.com>
Cc: linux-nvme@lists.infradead.org
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/nvme/host/core.c