[igt-dev] [PATCH i-g-t] lib: Restore i915.reset before testing it in igt_allow_hang()

[Ville Syrjälä]

On Thu, Oct 24, 2019 at 04:34:16PM +0100, Chris Wilson wrote:
> igt_allow_hang() checks that the GPU can be reset before allowing the
> test to cause a GPU hang (which would need the reset to recover).
> However, our checking for allowing a hang depends on i915.reset which we
> later restore. Do that restoration before the check so that this test is
> not affected by earlier fails.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

Looks sensible.
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  lib/igt_gt.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/igt_gt.c b/lib/igt_gt.c
> index 5ca77471c..256c7cbc0 100644
> --- a/lib/igt_gt.c
> +++ b/lib/igt_gt.c
> @@ -175,8 +175,6 @@ igt_hang_t igt_allow_hang(int fd, unsigned ctx, unsigned flags)
>  	if (!igt_check_boolean_env_var("IGT_HANG", true))
>  		igt_skip("hang injection disabled by user");
>  	gem_context_require_bannable(fd);
> -	if (!igt_check_boolean_env_var("IGT_HANG_WITHOUT_RESET", false))
> -		igt_require(has_gpu_reset(fd));
>  
>  	allow_reset = 1;
>  	if ((flags & HANG_ALLOW_CAPTURE) == 0) {
> @@ -191,6 +189,9 @@ igt_hang_t igt_allow_hang(int fd, unsigned ctx, unsigned flags)
>  	}
>  	igt_require(igt_sysfs_set_parameter(fd, "reset", "%d", allow_reset));
>  
> +	if (!igt_check_boolean_env_var("IGT_HANG_WITHOUT_RESET", false))
> +		igt_require(has_gpu_reset(fd));
> +
>  	ban = context_get_ban(fd, ctx);
>  	if ((flags & HANG_ALLOW_BAN) == 0)
>  		context_set_ban(fd, ctx, 0);
> -- 
> 2.24.0.rc0
> 
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-- 
Ville Syrjälä
Intel