efi_loader: Add check for fallback fdt memory reservation

When running bootefi, we allocate new space but never check whether
the allocation succeeded. This patch adds a check so that in case
things go wrong, we at least know they did.

Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index a0a543496763a801a6aed0a88e982767faeb7712..771300ee94b739e36f16f2c6eed98e539e9b23c0 100644 (file)
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -133,7 +133,13 @@ static void *copy_fdt(void *fdt)
                               &new_fdt_addr) != EFI_SUCCESS) {
                /* If we can't put it there, put it somewhere */
                new_fdt_addr = (ulong)memalign(4096, fdt_size);
+               if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
+                                      &new_fdt_addr) != EFI_SUCCESS) {
+                       printf("ERROR: Failed to reserve space for FDT\n");
+                       return NULL;
+               }
        }
+
        new_fdt = (void*)(ulong)new_fdt_addr;
        memcpy(new_fdt, fdt, fdt_totalsize(fdt));
        fdt_set_totalsize(new_fdt, fdt_size);