sparc32: fix sparcstation 5 boot

The sparcstation 5 I have available has no MID property for the CPU.
This resulted in a panic when booting a SMP kernel on this box.

The assigned field in cpu_data is never used, so if we fail
to read the MID property then inform user and continue booting.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 91c10fb7085..850a1360c0d 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -53,6 +53,7 @@ cpumask_t smp_commenced_mask = CPU_MASK_NONE;
 void __cpuinit smp_store_cpu_info(int id)
 {
         int cpu_node;
+        int mid;
 
         cpu_data(id).udelay_val = loops_per_jiffy;
 
@@ -60,10 +61,13 @@ void __cpuinit smp_store_cpu_info(int id)
         cpu_data(id).clock_tick = prom_getintdefault(cpu_node,
                                                      "clock-frequency", 0);
         cpu_data(id).prom_node = cpu_node;
-        cpu_data(id).mid = cpu_get_hwmid(cpu_node);
+        mid = cpu_get_hwmid(cpu_node);
 
-        if (cpu_data(id).mid < 0)
-                panic("No MID found for CPU%d at node 0x%08d", id, cpu_node);
+        if (mid < 0) {
+                printk(KERN_NOTICE "No MID found for CPU%d at node 0x%08d", id, cpu_node);
+                mid = 0;
+        }
+        cpu_data(id).mid = mid;
 }
 
 void __init smp_cpus_done(unsigned int max_cpus)