libnvdimm: fix mode determination for e820 devices

Correctly display "safe" mode when a btt is established on a e820/memmap
defined pmem namespace.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c
index 8ebfcaa..9edf7eb 100644 (file)
--- a/drivers/nvdimm/namespace_devs.c
+++ b/drivers/nvdimm/namespace_devs.c
@@ -1277,10 +1277,12 @@ static ssize_t mode_show(struct device *dev,
 
        device_lock(dev);
        claim = ndns->claim;
-       if (pmem_should_map_pages(dev) || (claim && is_nd_pfn(claim)))
-               mode = "memory";
-       else if (claim && is_nd_btt(claim))
+       if (claim && is_nd_btt(claim))
                mode = "safe";
+       else if (claim && is_nd_pfn(claim))
+               mode = "memory";
+       else if (!claim && pmem_should_map_pages(dev))
+               mode = "memory";
        else
                mode = "raw";
        rc = sprintf(buf, "%s\n", mode);