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Subject[GIT pull] x86 fix for 4.13
Linus,

please pull the latest x86-urgent-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-urgent-for-linus

The recent irq core changes unearthed API abuse in the HPET code, which
manifested itself in a suspend/resume regression. The fix replaces the
cruft with the proper function calls and cures the regression.

Thanks,

tglx

------------------>
Thomas Gleixner (1):
x86/hpet: Cure interface abuse in the resume path


arch/x86/kernel/hpet.c | 27 +++++++++++----------------
1 file changed, 11 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 16f82a3aaec7..8ce4212e2b8d 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -345,21 +345,10 @@ static int hpet_shutdown(struct clock_event_device *evt, int timer)
return 0;
}

-static int hpet_resume(struct clock_event_device *evt, int timer)
-{
- if (!timer) {
- hpet_enable_legacy_int();
- } else {
- struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
-
- irq_domain_deactivate_irq(irq_get_irq_data(hdev->irq));
- irq_domain_activate_irq(irq_get_irq_data(hdev->irq));
- disable_hardirq(hdev->irq);
- irq_set_affinity(hdev->irq, cpumask_of(hdev->cpu));
- enable_irq(hdev->irq);
- }
+static int hpet_resume(struct clock_event_device *evt)
+{
+ hpet_enable_legacy_int();
hpet_print_config();
-
return 0;
}

@@ -417,7 +406,7 @@ static int hpet_legacy_set_periodic(struct clock_event_device *evt)

static int hpet_legacy_resume(struct clock_event_device *evt)
{
- return hpet_resume(evt, 0);
+ return hpet_resume(evt);
}

static int hpet_legacy_next_event(unsigned long delta,
@@ -510,8 +499,14 @@ static int hpet_msi_set_periodic(struct clock_event_device *evt)
static int hpet_msi_resume(struct clock_event_device *evt)
{
struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
+ struct irq_data *data = irq_get_irq_data(hdev->irq);
+ struct msi_msg msg;

- return hpet_resume(evt, hdev->num);
+ /* Restore the MSI msg and unmask the interrupt */
+ irq_chip_compose_msi_msg(data, &msg);
+ hpet_msi_write(hdev, &msg);
+ hpet_msi_unmask(data);
+ return 0;
}

static int hpet_msi_next_event(unsigned long delta,
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