diff --git a/drivers/char/drm/drm_pciids.h b/drivers/char/drm/drm_pciids.h
index 54a2914e3a32..11c6950158b3 100644
--- a/drivers/char/drm/drm_pciids.h
+++ b/drivers/char/drm/drm_pciids.h
@@ -220,5 +220,6 @@
 	{0x8086, 0x2572, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0x8086, 0x2582, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0x8086, 0x2592, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
+	{0x8086, 0x2772, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, \
 	{0, 0, 0}
 
diff --git a/drivers/char/drm/radeon_irq.c b/drivers/char/drm/radeon_irq.c
index 5b18bee6492e..cd25f28e26a3 100644
--- a/drivers/char/drm/radeon_irq.c
+++ b/drivers/char/drm/radeon_irq.c
@@ -123,11 +123,6 @@ static int radeon_wait_irq(drm_device_t *dev, int swi_nr)
 
 	dev_priv->stats.boxes |= RADEON_BOX_WAIT_IDLE;
 
-	/* This is a hack to work around mysterious freezes on certain
-	 * systems:
-	 */ 
-	radeon_acknowledge_irqs( dev_priv );
-
 	DRM_WAIT_ON( ret, dev_priv->swi_queue, 3 * DRM_HZ, 
 		     RADEON_READ( RADEON_LAST_SWI_REG ) >= swi_nr );