powerpc: Use new irq allocator

Use the new functions and free the descriptor when the virq is
destroyed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 9 insertions, 8 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 0531ccda8005..8a958ca26ac2 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -678,16 +678,15 @@ void irq_set_virq_count(unsigned int count)
 static int irq_setup_virq(struct irq_host *host, unsigned int virq,
                             irq_hw_number_t hwirq)
 {
-        struct irq_desc *desc;
+        int res;
 
-        desc = irq_to_desc_alloc_node(virq, 0);
-        if (!desc) {
+        res = irq_alloc_desc_at(virq, 0);
+        if (res != virq) {
                 pr_debug("irq: -> allocating desc failed\n");
                 goto error;
         }
 
-        /* Clear IRQ_NOREQUEST flag */
-        desc->status &= ~IRQ_NOREQUEST;
+        irq_clear_status_flags(virq, IRQ_NOREQUEST);
 
         /* map it */
         smp_wmb();
@@ -696,11 +695,13 @@ static int irq_setup_virq(struct irq_host *host, unsigned int virq,
 
         if (host->ops->map(host, virq, hwirq)) {
                 pr_debug("irq: -> mapping failed, freeing\n");
-                goto error;
+                goto errdesc;
         }
 
         return 0;
 
+errdesc:
+        irq_free_descs(virq, 1);
 error:
         irq_free_virt(virq, 1);
         return -1;
@@ -879,9 +880,9 @@ void irq_dispose_mapping(unsigned int virq)
         smp_mb();
         irq_map[virq].hwirq = host->inval_irq;
 
-        /* Set some flags */
-        irq_to_desc(virq)->status |= IRQ_NOREQUEST;
+        irq_set_status_flags(virq, IRQ_NOREQUEST);
 
+        irq_free_descs(virq, 1);
         /* Free it */
         irq_free_virt(virq, 1);
 }