#include <linux/tty_flip.h>
 #include <linux/sysrq.h>
 
+#include <asm/firmware.h>
 #include <asm/iseries/vio.h>
 #include <asm/iseries/hv_lp_event.h>
 #include <asm/iseries/hv_call_event.h>
        atomic_t wait_flag;
        int rc;
 
+       if (!firmware_has_feature(FW_FEATURE_ISERIES))
+               return -ENODEV;
+
        /* +2 for fudge */
        rc = viopath_open(HvLpConfig_getPrimaryLpIndex(),
                        viomajorsubtype_chario, VIOCHAR_WINDOW + 2);
 {
        int i;
 
+       if (!firmware_has_feature(FW_FEATURE_ISERIES))
+               return -ENODEV;
+
        printk(VIOCONS_KERN_INFO "registering console\n");
        for (i = 0; i < VTTY_PORTS; i++) {
                port_info[i].lp = HvLpIndexInvalid;