Re: [igt-dev] [PATCH i-g-t v2] igt/tests: Fix error checking in kms_atomic_transition

["Summers, Stuart via igt-dev" <igt-dev@lists.freedesktop.org>]

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On Fri, 2019-02-15 at 17:28 +0200, Stanislav Lisovskiy via igt-dev
wrote:
> From: Stanislav Lisovskiy <stanislav.lisovskiy@gmail.com>
> 
> There is no guarantee that error return value will be
> always EINVAL, made a check more general as it can be
> ERANGE, ENOSPC, EINVAL and probably others, which all
> mean the same in context of this test case: i.e this sprite
> size is not valid.
> 
> v2: Added macro to make check look a bit nicer.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109225
> Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
> ---
>  tests/kms_atomic_transition.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/kms_atomic_transition.c
> b/tests/kms_atomic_transition.c
> index 12bafe87..32bff1e9 100644
> --- a/tests/kms_atomic_transition.c
> +++ b/tests/kms_atomic_transition.c
> @@ -187,6 +187,11 @@ static void set_sprite_wh(igt_display_t
> *display, enum pipe pipe,
>  		      LOCAL_DRM_FORMAT_MOD_NONE, sprite_fb);
>  }
>  
> +#define is_atomic_check_failure_errno(errno) \
> +		(errno == -EINVAL || \
> +		errno == -ERANGE || \
> +		errno == -ENOSPC)
> +
>  static void setup_parms(igt_display_t *display, enum pipe pipe,
>  			const drmModeModeInfo *mode,
>  			struct igt_fb *primary_fb,
> @@ -252,7 +257,7 @@ retry:
>  		wm_setup_plane(display, pipe, (1 << n_planes) - 1,
> parms, false);
>  		ret = igt_display_try_commit_atomic(display,
> DRM_MODE_ATOMIC_TEST_ONLY | DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
>  
> -		if (ret == -EINVAL) {
> +		if (is_atomic_check_failure_errno(ret)) {
>  			if (cursor_width == sprite_width &&
>  			    cursor_height == sprite_height) {
>  				igt_assert_f(alpha,
> @@ -391,6 +396,7 @@ run_transition_test(igt_display_t *display, enum
> pipe pipe, igt_output_t *output
>  	igt_plane_t *plane;
>  	igt_pipe_t *pipe_obj = &display->pipes[pipe];
>  	uint32_t iter_max = 1 << pipe_obj->n_planes, i;
> +	iter_max = 1 << 3;

Why this added assignment?

>  	struct plane_parms parms[pipe_obj->n_planes];
>  	unsigned flags = 0;
>  	int ret;
> @@ -442,7 +448,7 @@ run_transition_test(igt_display_t *display, enum
> pipe pipe, igt_output_t *output
>  			igt_pipe_request_out_fence(pipe_obj);
>  
>  		ret = igt_display_try_commit_atomic(display,
> DRM_MODE_ATOMIC_TEST_ONLY | DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
> -		if (ret != -EINVAL || pipe_obj->n_planes < 3)
> +		if (!is_atomic_check_failure_errno(ret) || pipe_obj-
> >n_planes < 3)
>  			break;
>  
>  		ret = 0;

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