boot: fdt: Move usable variable below updated comment

Move the variable below comment which explains what the variable means.
Update the comment. No functional change.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

diff --git a/boot/image-fdt.c b/boot/image-fdt.c
index c37442c913027255f570cacd6407def1cb733297..2b92bdaff169d991b3b766f40ed8678398012651 100644 (file)
--- a/boot/image-fdt.c
+++ b/boot/image-fdt.c
@@ -218,12 +218,12 @@ int boot_relocate_fdt(struct lmb *lmb, char **of_flat_tree, ulong *of_size)
                        if (start + size < low)
                                continue;
 
-                       usable = min(start + size, low + mapsize);
-
                        /*
                         * At least part of this DRAM bank is usable, try
-                        * using it for LMB allocation.
+                        * using the DRAM bank up to 'usable' address limit
+                        * for LMB allocation.
                         */
+                       usable = min(start + size, low + mapsize);
                        addr = lmb_alloc_base(lmb, of_len, 0x1000, usable);
                        of_start = map_sysmem(addr, of_len);
                        /* Allocation succeeded, use this block. */