1 files changed, 7 insertions, 1 deletions

diff --git a/arch/mips/kernel/csrc-ioasic.c b/arch/mips/kernel/csrc-ioasic.c
index 87e88feb4a25..6cbbf6e106b9 100644
--- a/arch/mips/kernel/csrc-ioasic.c
+++ b/arch/mips/kernel/csrc-ioasic.c
@@ -37,7 +37,7 @@ static struct clocksource clocksource_dec = {
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
-void __init dec_ioasic_clocksource_init(void)
+int __init dec_ioasic_clocksource_init(void)
 {
         unsigned int freq;
         u32 start, end;
@@ -56,8 +56,14 @@ void __init dec_ioasic_clocksource_init(void)
         end = dec_ioasic_hpt_read(&clocksource_dec);
 
         freq = (end - start) * 8;
+
+        /* An early revision of the I/O ASIC didn't have the counter.  */
+        if (!freq)
+                return -ENXIO;
+
         printk(KERN_INFO "I/O ASIC clock frequency %dHz\n", freq);
 
         clocksource_dec.rating = 200 + freq / 10000000;
         clocksource_register_hz(&clocksource_dec, freq);
+        return 0;
 }