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Commit ceb18029 authored by Ian Campbell's avatar Ian Campbell Committed by Stefano Stabellini
Browse files

xen: suspend: refactor cancellation flag into a structure 



Will add extra fields in subsequent patches.

Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent bd1c0ad2

drivers/xen/manage.c

+19 −13
Original line number Diff line number Diff line
@@ -34,11 +34,15 @@ enum shutdown_state { 
/* Ignore multiple shutdown requests. */

static enum shutdown_state shutting_down = SHUTDOWN_INVALID;



struct suspend_info {

	int cancelled;

};



#ifdef CONFIG_PM_SLEEP

static int xen_hvm_suspend(void *data)

{

	struct suspend_info *si = data;

	int err;

	int *cancelled = data;



	BUG_ON(!irqs_disabled());
@@ -54,12 +58,12 @@ static int xen_hvm_suspend(void *data) 
	 * or the domain was merely checkpointed, and 0 if it

	 * is resuming in a new domain.

	 */

	*cancelled = HYPERVISOR_suspend(0UL);

	si->cancelled = HYPERVISOR_suspend(0UL);



	xen_hvm_post_suspend(*cancelled);

	xen_hvm_post_suspend(si->cancelled);

	gnttab_resume();



	if (!*cancelled) {

	if (!si->cancelled) {

		xen_irq_resume();

		xen_console_resume();

		xen_timer_resume();
@@ -72,8 +76,8 @@ static int xen_hvm_suspend(void *data) 


static int xen_suspend(void *data)

{

	struct suspend_info *si = data;

	int err;

	int *cancelled = data;



	BUG_ON(!irqs_disabled());
@@ -93,13 +97,13 @@ static int xen_suspend(void *data) 
	 * or the domain was merely checkpointed, and 0 if it

	 * is resuming in a new domain.

	 */

	*cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));

	si->cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));



	xen_post_suspend(*cancelled);

	xen_post_suspend(si->cancelled);

	gnttab_resume();

	xen_mm_unpin_all();



	if (!*cancelled) {

	if (!si->cancelled) {

		xen_irq_resume();

		xen_console_resume();

		xen_timer_resume();
@@ -113,7 +117,7 @@ static int xen_suspend(void *data) 
static void do_suspend(void)

{

	int err;

	int cancelled = 1;

	struct suspend_info si;



	shutting_down = SHUTDOWN_SUSPEND;
@@ -143,20 +147,22 @@ static void do_suspend(void) 
		goto out_resume;

	}



	si.cancelled = 1;



	if (xen_hvm_domain())

		err = stop_machine(xen_hvm_suspend, &cancelled, cpumask_of(0));

		err = stop_machine(xen_hvm_suspend, &si, cpumask_of(0));

	else

		err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));

		err = stop_machine(xen_suspend, &si, cpumask_of(0));



	dpm_resume_noirq(PMSG_RESUME);



	if (err) {

		printk(KERN_ERR "failed to start xen_suspend: %d\n", err);

		cancelled = 1;

		si.cancelled = 1;

	}



out_resume:

	if (!cancelled) {

	if (!si.cancelled) {

		xen_arch_resume();

		xs_resume();

	} else