nvdimm/pmem: cleanup the disk if pmem_release_disk() is yet assigned

[ Upstream commit accf58afb689f81daadde24080ea1164ad2db75f ]

Prior to devm being able to use pmem_release_disk() there are other
failure which can occur for which we must account for and release the
disk for. Address those few cases.

Fixes: 3dd60fb9d95d ("nvdimm/pmem: stop using q_usage_count as external pgmap refcount")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20211103230437.1639990-6-mcgrof@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 054154c..2721dd2 100644 (file)
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -429,8 +429,10 @@ static int pmem_attach_disk(struct device *dev,
                bb_range.end = res->end;
        }
 
-       if (IS_ERR(addr))
-               return PTR_ERR(addr);
+       if (IS_ERR(addr)) {
+               rc = PTR_ERR(addr);
+               goto out;
+       }
        pmem->virt_addr = addr;
 
        blk_queue_write_cache(q, true, fua);
@@ -455,7 +457,8 @@ static int pmem_attach_disk(struct device *dev,
                flags = DAXDEV_F_SYNC;
        dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags);
        if (IS_ERR(dax_dev)) {
-               return PTR_ERR(dax_dev);
+               rc = PTR_ERR(dax_dev);
+               goto out;
        }
        dax_write_cache(dax_dev, nvdimm_has_cache(nd_region));
        pmem->dax_dev = dax_dev;
@@ -470,8 +473,10 @@ static int pmem_attach_disk(struct device *dev,
                                          "badblocks");
        if (!pmem->bb_state)
                dev_warn(dev, "'badblocks' notification disabled\n");
-
        return 0;
+out:
+       blk_cleanup_disk(pmem->disk);
+       return rc;
 }
 
 static int nd_pmem_probe(struct device *dev)