drm/radeon: Update IH_RB_RPTR register after each processed interrupt

This might decrease the chance of IH ring buffer overflows.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/cik.c

@@ -8251,6 +8251,7 @@ int cik_irq_process(struct radeon_device *rdev)
 		/* wptr/rptr are in bytes! */
 		rptr += 16;
 		rptr &= rdev->ih.ptr_mask;
+		WREG32(IH_RB_RPTR, rptr);
 	}
 	if (queue_hotplug)
 		schedule_work(&rdev->hotplug_work);
@@ -8259,7 +8260,6 @@ int cik_irq_process(struct radeon_device *rdev)
 	if (queue_thermal)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
-	WREG32(IH_RB_RPTR, rdev->ih.rptr);
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

drivers/gpu/drm/radeon/evergreen.c

@@ -5137,6 +5137,7 @@ int evergreen_irq_process(struct radeon_device *rdev)
 		/* wptr/rptr are in bytes! */
 		rptr += 16;
 		rptr &= rdev->ih.ptr_mask;
+		WREG32(IH_RB_RPTR, rptr);
 	}
 	if (queue_hotplug)
 		schedule_work(&rdev->hotplug_work);
@@ -5145,7 +5146,6 @@ int evergreen_irq_process(struct radeon_device *rdev)
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
-	WREG32(IH_RB_RPTR, rdev->ih.rptr);
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

drivers/gpu/drm/radeon/r600.c

@@ -4048,6 +4048,7 @@ int r600_irq_process(struct radeon_device *rdev)
 		/* wptr/rptr are in bytes! */
 		rptr += 16;
 		rptr &= rdev->ih.ptr_mask;
+		WREG32(IH_RB_RPTR, rptr);
 	}
 	if (queue_hotplug)
 		schedule_work(&rdev->hotplug_work);
@@ -4056,7 +4057,6 @@ int r600_irq_process(struct radeon_device *rdev)
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
-	WREG32(IH_RB_RPTR, rdev->ih.rptr);
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */

drivers/gpu/drm/radeon/si.c

@@ -6664,13 +6664,13 @@ int si_irq_process(struct radeon_device *rdev)
 		/* wptr/rptr are in bytes! */
 		rptr += 16;
 		rptr &= rdev->ih.ptr_mask;
+		WREG32(IH_RB_RPTR, rptr);
 	}
 	if (queue_hotplug)
 		schedule_work(&rdev->hotplug_work);
 	if (queue_thermal && rdev->pm.dpm_enabled)
 		schedule_work(&rdev->pm.dpm.thermal.work);
 	rdev->ih.rptr = rptr;
-	WREG32(IH_RB_RPTR, rdev->ih.rptr);
 	atomic_set(&rdev->ih.lock, 0);
 
 	/* make sure wptr hasn't changed while processing */