[PATCH] x86_64 irq: reset more to default when clear irq_vector for destroy_irq

 
Clear the irq releated entries in irq_vector, irq_domain and vector_irq 
instead of clearing irq_vector only. So when new irq is created, it 
could get that vector.

Signed-off-By: Yinghai Lu <[email protected]>

--- linux-2.6/arch/x86_64/kernel/io_apic.c	2006-10-24
13:40:48.000000000 -0700
+++ linux-2.6.xx/arch/x86_64/kernel/io_apic.c	2006-10-24
14:03:08.000000000 -0700
@@ -716,6 +716,22 @@
 	return vector;
 }
 
+static void __clear_irq_vector(int irq)
+{
+	int old_vector = -1;
+	if (irq_vector[irq] > 0)
+		old_vector = irq_vector[irq];
+	if (old_vector >= 0) {
+		cpumask_t old_mask;
+		int old_cpu;
+		cpus_and(old_mask, irq_domain[irq], cpu_online_map);
+		for_each_cpu_mask(old_cpu, old_mask)
+			per_cpu(vector_irq, old_cpu)[old_vector] = -1;
+	}
+	irq_vector[irq] = 0;
+	irq_domain[irq] = CPU_MASK_NONE;
+}
+
 void __setup_vector_irq(int cpu)
 {
 	/* Initialize vector_irq on a new cpu */
@@ -1803,7 +1819,7 @@
 	dynamic_irq_cleanup(irq);
 
 	spin_lock_irqsave(&vector_lock, flags);
-	irq_vector[irq] = 0;
+	__clear_irq_vector(irq);
 	spin_unlock_irqrestore(&vector_lock, flags);
 }
 


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH] x86_64 irq: reset more to default when clear irq_vector for destroy_irq
    • From: "Yinghai Lu" <[email protected]>
  • Re: [PATCH] x86_64 irq: reset more to default when clear irq_vector for destroy_irq
    • From: Josef Sipek <[email protected]>

• Prev by Date: Re: [patch 3/3] mm: fault handler to replace nopage and populate
• Next by Date: Re: [PATCH] Freeze bdevs when freezing processes.
• Previous by thread: [PATCH 1/1] Fabric7 VIOC: Ethtool
• Next by thread: Re: [PATCH] x86_64 irq: reset more to default when clear irq_vector for destroy_irq
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]