[igt-dev] [PATCH i-g-t 4/5] igt: add timeline test cases

[Chris Wilson]

Quoting Lionel Landwerlin (2019-05-16 15:39:49)
> +static int
> +__syncobj_timeline_signal(int fd, uint32_t *handles, uint64_t *points, uint32_t count)
> +{
> +       struct drm_syncobj_timeline_array array = { 0 };

Note you can use the gcc {} extension here.

> +       int err = 0;
> +
> +       array.handles = to_user_pointer(handles);
> +       array.points = to_user_pointer(points);
> +       array.count_handles = count;
> +       if (drmIoctl(fd, DRM_IOCTL_SYNCOBJ_TIMELINE_SIGNAL, &array))
> +               err = -errno;

Clear errno afterwards, it just gets left around and messes up assert
strings.

Use igt_assume(err) otherwise Petri will have to silence coverity later.

Use igt_ioctl() instead of drmIoctl() so that we can replace the 
drmIoctl() with the fancy error/signal injection wrappers or whatever
takes our fancy later.
-Chris