summaryrefslogtreecommitdiffstats
path: root/drivers/nvme
diff options
context:
space:
mode:
authorKeith Busch <keith.busch@intel.com>2016-02-11 13:05:42 -0700
committerJens Axboe <axboe@fb.com>2016-02-12 08:10:08 -0700
commitae1fba20015bca7401db2422fe18c9c049184163 (patch)
treebd7c64840a6a5b76aafcd6505f265da487e3aca2 /drivers/nvme
parentef2d4615c59efb312e531a5e949970f37ca1c841 (diff)
downloadlinux-ae1fba20015bca7401db2422fe18c9c049184163.tar.bz2
NVMe: Requeue requests on suspended queues
It's possible a request may get to the driver after the nvme queue was disabled. This has the request requeue if that happens. Note the request is still "started" by the driver, but requeuing will clear the start state for timeout handling. Signed-off-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/pci.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 72ef8322d32a..e5c2bea01dbf 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -678,6 +678,11 @@ static int nvme_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(req);
spin_lock_irq(&nvmeq->q_lock);
+ if (unlikely(nvmeq->cq_vector < 0)) {
+ ret = BLK_MQ_RQ_QUEUE_BUSY;
+ spin_unlock_irq(&nvmeq->q_lock);
+ goto out;
+ }
__nvme_submit_cmd(nvmeq, &cmnd);
nvme_process_cq(nvmeq);
spin_unlock_irq(&nvmeq->q_lock);