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

* 'bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen: try harder to balloon up under memory pressure.
  Xen balloon: fix totalram_pages counting.
  xen: explicitly create/destroy stop_machine workqueues outside suspend/resume region.
  xen: improve error handling in do_suspend.
  xen: don't leak IRQs over suspend/resume.
  xen: call clock resume notifier on all CPUs
  xen: use iret for return from 64b kernel to 32b usermode
  xen: don't call dpm_resume_noirq() with interrupts disabled.
  xen: register runstate info for boot CPU early
  xen: register runstate on secondary CPUs
  xen: register timer interrupt with IRQF_TIMER
  xen: correctly restore pfn_to_mfn_list_list after resume
  xen: restore runstate_info even if !have_vcpu_info_placement
  xen: re-register runstate area earlier on resume.
  xen: wait up to 5 minutes for device connetion
  xen: improvement to wait_for_devices()
  xen: fix is_disconnected_device/exists_disconnected_device
  xen/xenbus: make DEVICE_ATTR()s static

1 files changed, 24 insertions, 13 deletions

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 10d03d7931c4..c4997930afc7 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -43,7 +43,6 @@ static int xen_suspend(void *data)
         if (err) {
                 printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n",
                         err);
-                dpm_resume_noirq(PMSG_RESUME);
                 return err;
         }
 
@@ -69,7 +68,6 @@ static int xen_suspend(void *data)
         }
 
         sysdev_resume();
-        dpm_resume_noirq(PMSG_RESUME);
 
         return 0;
 }
@@ -81,6 +79,12 @@ static void do_suspend(void)
 
         shutting_down = SHUTDOWN_SUSPEND;
 
+        err = stop_machine_create();
+        if (err) {
+                printk(KERN_ERR "xen suspend: failed to setup stop_machine %d\n", err);
+                goto out;
+        }
+
 #ifdef CONFIG_PREEMPT
         /* If the kernel is preemptible, we need to freeze all the processes
            to prevent them from being in the middle of a pagetable update
@@ -88,29 +92,32 @@ static void do_suspend(void)
         err = freeze_processes();
         if (err) {
                 printk(KERN_ERR "xen suspend: freeze failed %d\n", err);
-                return;
+                goto out_destroy_sm;
         }
 #endif
 
         err = dpm_suspend_start(PMSG_SUSPEND);
         if (err) {
                 printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err);
-                goto out;
+                goto out_thaw;
         }
 
-        printk(KERN_DEBUG "suspending xenstore...\n");
-        xs_suspend();
-
         err = dpm_suspend_noirq(PMSG_SUSPEND);
         if (err) {
                 printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err);
-                goto resume_devices;
+                goto out_resume;
         }
 
+        printk(KERN_DEBUG "suspending xenstore...\n");
+        xs_suspend();
+
         err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
+
+        dpm_resume_noirq(PMSG_RESUME);
+
         if (err) {
                 printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
-                goto out;
+                cancelled = 1;
         }
 
         if (!cancelled) {
@@ -119,17 +126,21 @@ static void do_suspend(void)
         } else
                 xs_suspend_cancel();
 
-        dpm_resume_noirq(PMSG_RESUME);
-
-resume_devices:
+out_resume:
         dpm_resume_end(PMSG_RESUME);
 
         /* Make sure timer events get retriggered on all CPUs */
         clock_was_set();
-out:
+
+out_thaw:
 #ifdef CONFIG_PREEMPT
         thaw_processes();
+
+out_destroy_sm:
 #endif
+        stop_machine_destroy();
+
+out:
         shutting_down = SHUTDOWN_INVALID;
 }
 #endif  /* CONFIG_PM_SLEEP */