Merge branch 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen

* 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: do not release any memory under 1M in domain 0
  xen: events: do not unmask event channels on resume
  xen: correct size of level2_kernel_pgt

1 files changed, 18 insertions, 7 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 97612f548a8e..321a0c8346e5 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1299,9 +1299,6 @@ static void restore_cpu_virqs(unsigned int cpu)
                 evtchn_to_irq[evtchn] = irq;
                 irq_info[irq] = mk_virq_info(evtchn, virq);
                 bind_evtchn_to_cpu(evtchn, cpu);
-
-                /* Ready for use. */
-                unmask_evtchn(evtchn);
         }
 }
 
@@ -1327,10 +1324,6 @@ static void restore_cpu_ipis(unsigned int cpu)
                 evtchn_to_irq[evtchn] = irq;
                 irq_info[irq] = mk_ipi_info(evtchn, ipi);
                 bind_evtchn_to_cpu(evtchn, cpu);
-
-                /* Ready for use. */
-                unmask_evtchn(evtchn);
-
         }
 }
 
@@ -1390,6 +1383,7 @@ void xen_poll_irq(int irq)
 void xen_irq_resume(void)
 {
         unsigned int cpu, irq, evtchn;
+        struct irq_desc *desc;
 
         init_evtchn_cpu_bindings();
 
@@ -1408,6 +1402,23 @@ void xen_irq_resume(void)
                 restore_cpu_virqs(cpu);
                 restore_cpu_ipis(cpu);
         }
+
+        /*
+         * Unmask any IRQF_NO_SUSPEND IRQs which are enabled. These
+         * are not handled by the IRQ core.
+         */
+        for_each_irq_desc(irq, desc) {
+                if (!desc->action || !(desc->action->flags & IRQF_NO_SUSPEND))
+                        continue;
+                if (desc->status & IRQ_DISABLED)
+                        continue;
+
+                evtchn = evtchn_from_irq(irq);
+                if (evtchn == -1)
+                        continue;
+
+                unmask_evtchn(evtchn);
+        }
 }
 
 static struct irq_chip xen_dynamic_chip __read_mostly = {