1 files changed, 9 insertions, 5 deletions

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 886e80347b32..4c60a50e66b2 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -257,13 +257,11 @@ int __init early_irq_init(void)
         count = ARRAY_SIZE(irq_desc);
 
         for (i = 0; i < count; i++) {
-                desc[i].irq_data.irq = i;
-                desc[i].irq_data.chip = &no_irq_chip;
                 desc[i].kstat_irqs = alloc_percpu(unsigned int);
-                irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
-                alloc_masks(desc + i, GFP_KERNEL, node);
-                desc_smp_init(desc + i, node);
+                alloc_masks(&desc[i], GFP_KERNEL, node);
+                raw_spin_lock_init(&desc[i].lock);
                 lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
+                desc_set_defaults(i, &desc[i], node);
         }
         return arch_early_irq_init();
 }
@@ -346,6 +344,12 @@ irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node)
         if (!cnt)
                 return -EINVAL;
 
+        if (irq >= 0) {
+                if (from > irq)
+                        return -EINVAL;
+                from = irq;
+        }
+
         mutex_lock(&sparse_irq_lock);
 
         start = bitmap_find_next_zero_area(allocated_irqs, IRQ_BITMAP_BITS,