workqueue: fix flush_workqueue() vs CPU_DEAD race

[powerpc.git] / kernel / irq / chip.c

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 475e8a7..615ce97 100644 (file)
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/irq.h>
+#include <linux/msi.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
@@ -168,7 +169,7 @@ EXPORT_SYMBOL(set_irq_data);
 /**
  *     set_irq_data - set irq type data for an irq
  *     @irq:   Interrupt number
- *     @data:  Pointer to interrupt specific data
+ *     @entry: Pointer to MSI descriptor data
  *
  *     Set the hardware irq controller data for an irq
  */
@@ -185,6 +186,8 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
        desc = irq_desc + irq;
        spin_lock_irqsave(&desc->lock, flags);
        desc->msi_desc = entry;
+       if (entry)
+               entry->irq = irq;
        spin_unlock_irqrestore(&desc->lock, flags);
        return 0;
 }
@@ -230,10 +233,6 @@ static void default_enable(unsigned int irq)
  */
 static void default_disable(unsigned int irq)
 {
-       struct irq_desc *desc = irq_desc + irq;
-
-       if (!(desc->status & IRQ_DELAYED_DISABLE))
-               desc->chip->mask(irq);
 }
 
 /*
@@ -298,13 +297,18 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
 
        if (unlikely(desc->status & IRQ_INPROGRESS))
                goto out_unlock;
-       desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
        kstat_cpu(cpu).irqs[irq]++;
 
        action = desc->action;
-       if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+       if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
+               if (desc->chip->mask)
+                       desc->chip->mask(irq);
+               desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
+               desc->status |= IRQ_PENDING;
                goto out_unlock;
+       }
 
+       desc->status &= ~(IRQ_REPLAY | IRQ_WAITING | IRQ_PENDING);
        desc->status |= IRQ_INPROGRESS;
        spin_unlock(&desc->lock);
 
@@ -396,11 +400,13 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 
        /*
         * If its disabled or no action available
-        * keep it masked and get out of here
+        * then mask it and get out of here:
         */
        action = desc->action;
        if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
                desc->status |= IRQ_PENDING;
+               if (desc->chip->mask)
+                       desc->chip->mask(irq);
                goto out;
        }
 
@@ -562,10 +568,8 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
 
        /* Uninstall? */
        if (handle == handle_bad_irq) {
-               if (desc->chip != &no_irq_chip) {
-                       desc->chip->mask(irq);
-                       desc->chip->ack(irq);
-               }
+               if (desc->chip != &no_irq_chip)
+                       mask_ack_irq(desc, irq);
                desc->status |= IRQ_DISABLED;
                desc->depth = 1;
        }