[LMB]: Fix lmb_add_region if region should be added at the head

We introduced a bug in fixing lmb_add_region to handle an initial
region being non-zero.  Before that fix it was impossible to insert a
region at the head of the list since the first region always started
at zero.

Now that its possible for the first region to be non-zero we need to
check to see if the new region should be added at the head and if so
actually add it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/lmb.c b/lib/lmb.c
index e3c8dcb04b46..3c43b95fef4a 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -184,6 +184,11 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
                         break;
                 }
         }
+
+        if (base < rgn->region[0].base) {
+                rgn->region[0].base = base;
+                rgn->region[0].size = size;
+        }
         rgn->cnt++;
 
         return 0;