nvme-pci: queue creation fixes

We've been ignoring NVMe error status on queue creations. Fortunately they
are uncommon, but we should handle these anyway. This patch adds checks
for the a positive error return value that indicates an NVMe status.

If we do see a negative return, the controller isn't usable, so this
patch returns immediately in since we can't unwind that failure.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 4963a40..7a42cca 100644 (file)
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1475,11 +1475,13 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid)
         */
        vector = dev->num_vecs == 1 ? 0 : qid;
        result = adapter_alloc_cq(dev, qid, nvmeq, vector);
-       if (result < 0)
-               goto out;
+       if (result)
+               return result;
 
        result = adapter_alloc_sq(dev, qid, nvmeq);
        if (result < 0)
+               return result;
+       else if (result)
                goto release_cq;
 
        /*
@@ -1501,7 +1503,6 @@ release_sq:
        adapter_delete_sq(dev, qid);
 release_cq:
        adapter_delete_cq(dev, qid);
-out:
        return result;
 }