drm: Fix further issues in drivers/char/drm/via_irq.c

Fix de-reference of 'dev_priv' before NULL check.

Signed-off-by: Jayachandran C. <c.jayachandran@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@osdl.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/char/drm/via_irq.c b/drivers/char/drm/via_irq.c
index 1228fa55355b..c33d068cde19 100644
--- a/drivers/char/drm/via_irq.c
+++ b/drivers/char/drm/via_irq.c
@@ -196,7 +196,7 @@ via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence,
 {
         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
         unsigned int cur_irq_sequence;
-        drm_via_irq_t *cur_irq = dev_priv->via_irqs;
+        drm_via_irq_t *cur_irq;
         int ret = 0;
         maskarray_t *masks;
         int real_irq;
@@ -223,7 +223,7 @@ via_driver_irq_wait(drm_device_t * dev, unsigned int irq, int force_sequence,
         }
 
         masks = dev_priv->irq_masks;
-        cur_irq += real_irq;
+        cur_irq = dev_priv->via_irqs + real_irq;
 
         if (masks[real_irq][2] && !force_sequence) {
                 DRM_WAIT_ON(ret, cur_irq->irq_queue, 3 * DRM_HZ,
@@ -248,11 +248,12 @@ void via_driver_irq_preinstall(drm_device_t * dev)
 {
         drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
         u32 status;
-        drm_via_irq_t *cur_irq = dev_priv->via_irqs;
+        drm_via_irq_t *cur_irq;
         int i;
 
         DRM_DEBUG("driver_irq_preinstall: dev_priv: %p\n", dev_priv);
         if (dev_priv) {
+                cur_irq = dev_priv->via_irqs;
 
                 dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE;
                 dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING;