powerpc/mpc85xx: check number of cores

Panic if the number of cores is more than CONFIG_MAX_CPUS because it will
surely overflow gd structure.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

diff --git a/arch/powerpc/cpu/mpc85xx/cpu.c b/arch/powerpc/cpu/mpc85xx/cpu.c
index 26fc84c..40cce1d 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cpu.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu.c
@@ -127,6 +127,11 @@ int checkcpu (void)
 
        printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);
 
+       if (nr_cores > CONFIG_MAX_CPUS) {
+               panic("\nUnexpected number of cores: %d, max is %d\n",
+                       nr_cores, CONFIG_MAX_CPUS);
+       }
+
        get_sys_info(&sysinfo);
 
        puts("Clock Configuration:");