diff options
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 1f4711b60aa..fe5f8dc1e6f 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -534,18 +534,23 @@ int __cpuinit __cpu_up(unsigned int cpu) struct _lowcore *cpu_lowcore; struct stack_frame *sf; sigp_ccode ccode; + u32 lowcore; if (smp_cpu_state[cpu] != CPU_STATE_CONFIGURED) return -EIO; if (smp_alloc_lowcore(cpu)) return -ENOMEM; - - ccode = signal_processor_p((__u32)(unsigned long)(lowcore_ptr[cpu]), - cpu, sigp_set_prefix); - if (ccode) { - smp_free_lowcore(cpu); - return -EIO; - } + do { + ccode = signal_processor(cpu, sigp_initial_cpu_reset); + if (ccode == sigp_busy) + udelay(10); + if (ccode == sigp_not_operational) + goto err_out; + } while (ccode == sigp_busy); + + lowcore = (u32)(unsigned long)lowcore_ptr[cpu]; + while (signal_processor_p(lowcore, cpu, sigp_set_prefix) == sigp_busy) + udelay(10); idle = current_set[cpu]; cpu_lowcore = lowcore_ptr[cpu]; @@ -574,6 +579,10 @@ int __cpuinit __cpu_up(unsigned int cpu) while (!cpu_online(cpu)) cpu_relax(); return 0; + +err_out: + smp_free_lowcore(cpu); + return -EIO; } static int __init setup_possible_cpus(char *s) |