[PATCH v4 4/9] drm/xe/irq: Introduce xe_irq_disable()

[Raag Jadav <raag.jadav@intel.com>]

In preparation of usecases which require disabling interrupts before
PCIe FLR, introduce xe_irq_disable() helper. With this we avoid any
side-effects of unwarranted irqs.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
---
v2: Add kernel doc (Matthew Brost)
---
 drivers/gpu/drm/xe/xe_irq.c | 13 ++++++++++++-
 drivers/gpu/drm/xe/xe_irq.h |  1 +
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_irq.c b/drivers/gpu/drm/xe/xe_irq.c
index 7560a45f7f64..9a775c6588dc 100644
--- a/drivers/gpu/drm/xe/xe_irq.c
+++ b/drivers/gpu/drm/xe/xe_irq.c
@@ -841,7 +841,13 @@ static void xe_irq_msi_synchronize_irq(struct xe_device *xe)
 	synchronize_irq(to_pci_dev(xe->drm.dev)->irq);
 }
 
-void xe_irq_suspend(struct xe_device *xe)
+/**
+ * xe_irq_disable() - Disable irqs
+ * @xe: xe device instance
+ *
+ * Synchronize pending irqs and disable them.
+ */
+void xe_irq_disable(struct xe_device *xe)
 {
 	atomic_set(&xe->irq.enabled, 0); /* no new irqs */
 
@@ -850,6 +856,11 @@ void xe_irq_suspend(struct xe_device *xe)
 		xe_irq_msix_synchronize_irq(xe);
 	else
 		xe_irq_msi_synchronize_irq(xe);
+}
+
+void xe_irq_suspend(struct xe_device *xe)
+{
+	xe_irq_disable(xe);
 	xe_irq_reset(xe); /* turn irqs off */
 }
 
diff --git a/drivers/gpu/drm/xe/xe_irq.h b/drivers/gpu/drm/xe/xe_irq.h
index a28bd577ba52..abda0592a105 100644
--- a/drivers/gpu/drm/xe/xe_irq.h
+++ b/drivers/gpu/drm/xe/xe_irq.h
@@ -14,6 +14,7 @@ struct xe_device;
 struct xe_tile;
 struct xe_gt;
 
+void xe_irq_disable(struct xe_device *xe);
 int xe_irq_init(struct xe_device *xe);
 int xe_irq_install(struct xe_device *xe);
 void xe_irq_suspend(struct xe_device *xe);
-- 
2.43.0