drm/radeon: don't actually enable the IRQ regs until irq is enabled

vblank can try and enable the IRQ registers before we've set the interrupt
handler up.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_irq.c b/drivers/gpu/drm/radeon/radeon_irq.c
index 97c0599fdb1e..99be11418ac2 100644
--- a/drivers/gpu/drm/radeon/radeon_irq.c
+++ b/drivers/gpu/drm/radeon/radeon_irq.c
@@ -44,7 +44,8 @@ void radeon_irq_set_state(struct drm_device *dev, u32 mask, int state)
         else
                 dev_priv->irq_enable_reg &= ~mask;
 
-        RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
+        if (!dev->irq_enabled)
+                RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
 }
 
 static void r500_vbl_irq_set_state(struct drm_device *dev, u32 mask, int state)
@@ -56,7 +57,8 @@ static void r500_vbl_irq_set_state(struct drm_device *dev, u32 mask, int state)
         else
                 dev_priv->r500_disp_irq_reg &= ~mask;
 
-        RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
+        if (!dev->irq_enabled)
+                RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
 }
 
 int radeon_enable_vblank(struct drm_device *dev, int crtc)
@@ -355,8 +357,6 @@ void radeon_driver_irq_uninstall(struct drm_device * dev)
         if (!dev_priv)
                 return;
 
-        dev_priv->irq_enabled = 0;
-
         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS690)
                 RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
         /* Disable *all* interrupts */