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-rw-r--r--arch/x86/platform/uv/tlb_uv.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index fd8759111b65..3e4bdb442fbc 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -2221,13 +2221,17 @@ static int __init uv_bau_init(void)
else if (is_uv1_hub())
ops = uv1_bau_ops;
+ nuvhubs = uv_num_possible_blades();
+ if (nuvhubs < 2) {
+ pr_crit("UV: BAU disabled - insufficient hub count\n");
+ goto err_bau_disable;
+ }
+
for_each_possible_cpu(cur_cpu) {
mask = &per_cpu(uv_flush_tlb_mask, cur_cpu);
zalloc_cpumask_var_node(mask, GFP_KERNEL, cpu_to_node(cur_cpu));
}
- nuvhubs = uv_num_possible_blades();
-
uv_base_pnode = 0x7fffffff;
for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
cpus = uv_blade_nr_possible_cpus(uvhub);
@@ -2240,9 +2244,8 @@ static int __init uv_bau_init(void)
enable_timeouts();
if (init_per_cpu(nuvhubs, uv_base_pnode)) {
- set_bau_off();
- nobau_perm = 1;
- return 0;
+ pr_crit("UV: BAU disabled - per CPU init failed\n");
+ goto err_bau_disable;
}
vector = UV_BAU_MESSAGE;
@@ -2268,6 +2271,16 @@ static int __init uv_bau_init(void)
}
return 0;
+
+err_bau_disable:
+
+ for_each_possible_cpu(cur_cpu)
+ free_cpumask_var(per_cpu(uv_flush_tlb_mask, cur_cpu));
+
+ set_bau_off();
+ nobau_perm = 1;
+
+ return -EINVAL;
}
core_initcall(uv_bau_init);
fs_initcall(uv_ptc_init);