We were either returning 0, or a negative value cast to an unsigned int
for errors and the clients of that API weren't exactly checking
anything.

We're in luck, we can take shortcuts in a testing library to just assert
when an expected error occurs.

Signed-off-by: Damien Lespiau <[email protected]>
---
 lib/igt_fb.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index f383970..b8448c8 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -396,8 +396,7 @@ void igt_paint_image(cairo_t *cr, const char *filename,
  * for rgb pixel formats.
  *
  * Returns:
- * The kms id of the created framebuffer on success or a negative error code on
- * failure.
+ * The kms id of the created framebuffer.
  */
 unsigned int
 igt_create_fb_with_bo_size(int fd, int width, int height,
@@ -416,20 +415,16 @@ igt_create_fb_with_bo_size(int fd, int width, int height,
        bpp = igt_drm_format_to_bpp(format);
        ret = create_bo_for_fb(fd, width, height, bpp, tiling, &fb->gem_handle,
                              &fb->size, &fb->stride, bo_size);
-       if (ret < 0)
-               return ret;
+       igt_assert(ret == 0);
 
        memset(handles, 0, sizeof(handles));
        handles[0] = fb->gem_handle;
        memset(pitches, 0, sizeof(pitches));
        pitches[0] = fb->stride;
        memset(offsets, 0, sizeof(offsets));
-       if (drmModeAddFB2(fd, width, height, format, handles, pitches,
-                         offsets, &fb_id, 0) < 0) {
-               gem_close(fd, fb->gem_handle);
-
-               return 0;
-       }
+       ret = drmModeAddFB2(fd, width, height, format, handles, pitches,
+                           offsets, &fb_id, 0);
+       igt_assert(ret == 0);
 
        fb->width = width;
        fb->height = height;
@@ -457,8 +452,7 @@ igt_create_fb_with_bo_size(int fd, int width, int height,
  * for rgb pixel formats.
  *
  * Returns:
- * The kms id of the created framebuffer on success or a negative error code on
- * failure.
+ * The kms id of the created framebuffer.
  */
 unsigned int igt_create_fb(int fd, int width, int height, uint32_t format,
                           unsigned int tiling, struct igt_fb *fb)
-- 
1.8.3.1

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