drm/i915: dereferencing an error pointer

We need to check that "ctx" is a valid pointer before dereferencing it.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 873119f..da8b01f 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -497,11 +497,13 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
 
        ctx = create_hw_context(dev, file_priv);
        mutex_unlock(&dev->struct_mutex);
+       if (IS_ERR(ctx))
+               return PTR_ERR(ctx);
 
        args->ctx_id = ctx->id;
        DRM_DEBUG_DRIVER("HW context %d created\n", args->ctx_id);
 
-       return PTR_RET(ctx);
+       return 0;
 }
 
 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,