1 files changed, 6 insertions, 6 deletions

diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index 2d202f274e73..29a0e039d436 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -74,20 +74,20 @@ void __init reserve_crashkernel(void)
         ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(),
                         &crash_size, &crash_base);
         if (ret == 0 && crash_size > 0) {
-                if (crash_base == 0)
-                        crash_base = KDUMP_KERNELBASE;
                 crashk_res.start = crash_base;
-        } else {
-                /* handle the device tree */
-                crash_size = crashk_res.end - crashk_res.start + 1;
+                crashk_res.end = crash_base + crash_size - 1;
         }
 
-        if (crash_size == 0)
+        if (crashk_res.end == crashk_res.start) {
+                crashk_res.start = crashk_res.end = 0;
                 return;
+        }
 
         /* We might have got these values via the command line or the
          * device tree, either way sanitise them now. */
 
+        crash_size = crashk_res.end - crashk_res.start + 1;
+
         if (crashk_res.start != KDUMP_KERNELBASE)
                 printk("Crash kernel location must be 0x%x\n",
                                 KDUMP_KERNELBASE);