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drm/i915: fix possible NULL dereference of dev_priv

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Dereference dev_priv only after we know it is valid.
Found with smatch.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Mika Kuoppala 2012-11-12 14:20:19 +02:00 committed by Daniel Vetter
parent fc37381cc8
commit 4f1ba0f83a
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/i915/i915_dma.c
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@ -1045,7 +1045,7 @@ static int i915_set_status_page(struct drm_device *dev, void *data,
{
drm_i915_private_t *dev_priv = dev->dev_private;
drm_i915_hws_addr_t *hws = data;
struct intel_ring_buffer *ring = LP_RING(dev_priv);
struct intel_ring_buffer *ring;
if (drm_core_check_feature(dev, DRIVER_MODESET))
return -ENODEV;
@ -1065,6 +1065,7 @@ static int i915_set_status_page(struct drm_device *dev, void *data,
DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr);
ring = LP_RING(dev_priv);
ring->status_page.gfx_addr = hws->addr & (0x1ffff<<12);
dev_priv->dri1.gfx_hws_cpu_addr =