dm writecache: remove superfluous test in persistent_memory_claim

Remove superfluous test if dax_dev is NULL - dax_direct_access already
does this test.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 613c171..d29d3e2 100644 (file)
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -234,10 +234,6 @@ static int persistent_memory_claim(struct dm_writecache *wc)
 
        wc->memory_vmapped = false;
 
-       if (!wc->ssd_dev->dax_dev) {
-               r = -EOPNOTSUPP;
-               goto err1;
-       }
        s = wc->memory_map_size;
        p = s >> PAGE_SHIFT;
        if (!p) {