fdt: Fixup only valid memory banks

Memory banks with address 0 and size 0 are empty and should not be
passed to the OS via device tree.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>

diff --git a/common/fdt_support.c b/common/fdt_support.c
index 17623a1728f6982887148d82716d2cf4f8ab4258..bd0478de40c812c3f08a43af8f33866f21e12927 100644 (file)
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -418,7 +418,7 @@ static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
 {
        int err, nodeoffset;
-       int len;
+       int len, i;
        u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
 
        if (banks > MEMORY_BANKS_MAX) {
@@ -450,6 +450,12 @@ int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
        if (!banks)
                return 0;
 
+       for (i = 0; i < banks; i++)
+               if (start[i] == 0 && size[i] == 0)
+                       break;
+
+       banks = i;
+
        len = fdt_pack_reg(blob, tmp, start, size, banks);
 
        err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);