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>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 873119f2436e..da8b01fb1bf8 100644
--- 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,