drm/i915: Fix an error checking test

'dma_buf_vmap' returns NULL on error, not an error pointer.

Fixes: 6cca22ede8a4 ("drm/i915: Add some mock tests for dmabuf interop")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: http://patchwork.freedesktop.org/patch/msgid/20170627053854.21152-1-christophe.jaillet@wanadoo.fr
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 7c3f5317b8c2828ab10e8cf87c8ab5232d1966d0)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c
index d15cc9d..89dc25a 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c
@@ -246,9 +246,9 @@ static int igt_dmabuf_export_vmap(void *arg)
        i915_gem_object_put(obj);
 
        ptr = dma_buf_vmap(dmabuf);
-       if (IS_ERR(ptr)) {
-               err = PTR_ERR(ptr);
-               pr_err("dma_buf_vmap failed with err=%d\n", err);
+       if (!ptr) {
+               pr_err("dma_buf_vmap failed\n");
+               err = -ENOMEM;
                goto out;
        }