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>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 4963a407e728..7a42ccad3864 100644
--- 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;
 }