[Intel-gfx] [PATCH i-g-t] Check all sysfs entries are readable without dmesg spam

[Tvrtko Ursulin]

On 11/10/2019 13:43, Chris Wilson wrote:
> We already check that debugfs do not cause spam (and they tend to be
> more heavyhanded and so more likely to break), but that does not excuse
> not checking our sysfs directory!
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>   tests/debugfs_test.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/tests/debugfs_test.c b/tests/debugfs_test.c
> index f8dd851c9..2d4753df5 100644
> --- a/tests/debugfs_test.c
> +++ b/tests/debugfs_test.c
> @@ -56,7 +56,7 @@ static void read_and_discard_sysfs_entries(int path_fd, int indent)
>   			igt_debug("%sEntering subdir %s\n", tabs, dirent->d_name);
>   			read_and_discard_sysfs_entries(sub_fd, indent + 1);
>   			close(sub_fd);
> -		} else {
> +		} else if (dirent->d_type == DT_REG) {
>   			char buf[512];
>   			int sub_fd;
>   			ssize_t ret;
> @@ -149,7 +149,7 @@ static void kms_tests(int fd, int debugfs)
>   
>   igt_main
>   {
> -	int fd = -1, debugfs;
> +	int fd = -1, debugfs, sysfs;
>   
>   	igt_skip_on_simulation();
>   
> @@ -157,10 +157,13 @@ igt_main
>   		fd = drm_open_driver_master(DRIVER_INTEL);
>   		igt_require_gem(fd);
>   		debugfs = igt_debugfs_dir(fd);
> +		sysfs = igt_sysfs_open(fd);
>   
>   		kmstest_set_vt_graphics_mode();
>   	}
>   
> +	igt_subtest("sysfs")
> +		read_and_discard_sysfs_entries(sysfs, 0);
>   	igt_subtest("read_all_entries")
>   		read_and_discard_sysfs_entries(debugfs, 0);
>   
> @@ -168,6 +171,7 @@ igt_main
>   		kms_tests(fd, debugfs);
>   
>   	igt_fixture {
> +		close(sysfs);
>   		close(debugfs);
>   		close(fd);
>   	}
> 

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Regards,

Tvrtko