drm/radeon: don't set hpd, afmt interrupts when interrupts are disabled

Avoids splatter if the interrupt handler is not registered due
to acceleration being disabled.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org

drivers/gpu/drm/radeon/radeon_irq_kms.c

@@ -400,6 +400,9 @@ void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)
 {
 	unsigned long irqflags;
 
+	if (!rdev->ddev->irq_enabled)
+		return;
+
 	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	rdev->irq.afmt[block] = true;
 	radeon_irq_set(rdev);
@@ -419,6 +422,9 @@ void radeon_irq_kms_disable_afmt(struct radeon_device *rdev, int block)
 {
 	unsigned long irqflags;
 
+	if (!rdev->ddev->irq_enabled)
+		return;
+
 	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	rdev->irq.afmt[block] = false;
 	radeon_irq_set(rdev);
@@ -438,6 +444,9 @@ void radeon_irq_kms_enable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 	unsigned long irqflags;
 	int i;
 
+	if (!rdev->ddev->irq_enabled)
+		return;
+
 	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 		rdev->irq.hpd[i] |= !!(hpd_mask & (1 << i));
@@ -458,6 +467,9 @@ void radeon_irq_kms_disable_hpd(struct radeon_device *rdev, unsigned hpd_mask)
 	unsigned long irqflags;
 	int i;
 
+	if (!rdev->ddev->irq_enabled)
+		return;
+
 	spin_lock_irqsave(&rdev->irq.lock, irqflags);
 	for (i = 0; i < RADEON_MAX_HPD_PINS; ++i)
 		rdev->irq.hpd[i] &= !(hpd_mask & (1 << i));