[SPARC64]: Set dummy bucket->{imap,iclr} unique on SUN4V.

So that free_irq() disable's the IRQ correctly.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 5 deletions

diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index e1729e5189a3..580b4de8b7c6 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -143,7 +143,6 @@ void enable_irq(unsigned int irq)
 {
         struct ino_bucket *bucket = __bucket(irq);
         unsigned long imap;
-        unsigned long tid;
 
         imap = bucket->imap;
         if (imap == 0UL)
@@ -169,6 +168,8 @@ void enable_irq(unsigned int irq)
                         printk("sun4v_intr_setstate(%x): "
                                "err(%d)\n", ino, err);
         } else {
+                unsigned long tid;
+
                 if (tlb_type == cheetah || tlb_type == cheetah_plus) {
                         unsigned long ver;
 
@@ -342,9 +343,12 @@ unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino, int pil, unsign
         /* Catch accidental accesses to these things.  IMAP/ICLR handling
          * is done by hypervisor calls on sun4v platforms, not by direct
          * register accesses.
+         *
+         * But we need to make them look unique for the disable_irq() logic
+         * in free_irq().
          */
-        bucket->imap = ~0UL;
-        bucket->iclr = ~0UL;
+        bucket->imap = ~0UL - sysino;
+        bucket->iclr = ~0UL - sysino;
 
         bucket->pil = pil;
         bucket->flags = flags;
@@ -547,7 +551,6 @@ void free_irq(unsigned int irq, void *dev_id)
         bucket = __bucket(irq);
         if (bucket != &pil0_dummy_bucket) {
                 struct irq_desc *desc = bucket->irq_info;
-                unsigned long imap = bucket->imap;
                 int ent, i;
 
                 for (i = 0; i < MAX_IRQ_DESC_ACTION; i++) {
@@ -560,6 +563,8 @@ void free_irq(unsigned int irq, void *dev_id)
                 }
 
                 if (!desc->action_active_mask) {
+                        unsigned long imap = bucket->imap;
+
                         /* This unique interrupt source is now inactive. */
                         bucket->flags &= ~IBF_ACTIVE;
 
@@ -803,7 +808,6 @@ EXPORT_SYMBOL(probe_irq_off);
 static int retarget_one_irq(struct irqaction *p, int goal_cpu)
 {
         struct ino_bucket *bucket = get_ino_in_irqaction(p) + ivector_table;
-        unsigned long imap = bucket->imap;
 
         while (!cpu_online(goal_cpu)) {
                 if (++goal_cpu >= NR_CPUS)
@@ -816,6 +820,7 @@ static int retarget_one_irq(struct irqaction *p, int goal_cpu)
                 sun4v_intr_settarget(ino, goal_cpu);
                 sun4v_intr_setenabled(ino, HV_INTR_ENABLED);
         } else {
+                unsigned long imap = bucket->imap;
                 unsigned int tid;
 
                 if (tlb_type == cheetah || tlb_type == cheetah_plus) {