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From:   Kees Cook <keescook@chromium.org>
Date:   Tue, 27 Feb 2018 15:09:12 -0800
Message-ID: <CAGXu5jK85Ws=ZhN5r=m1Z8hj_nJYzH-X4+Q+xo1N-hgY7YZrQA@mail.gmail.com>
Subject: Re: [PATCH v2 02/11] test_firmware: replace syfs fallback check with
 kconfig_has helper
To:     "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc:     Greg KH <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Shuah Khan <shuah@kernel.org>,
        Martin Fuzzey <mfuzzey@parkeon.com>,
        Mimi Zohar <zohar@linux.vnet.ibm.com>,
        David Howells <dhowells@redhat.com>, pali.rohar@gmail.com,
        Takashi Iwai <tiwai@suse.de>, arend.vanspriel@broadcom.com,
        =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= <zajec5@gmail.com>,
        nbroeking@me.com, Vikram Mulukutla <markivx@codeaurora.org>,
        stephen.boyd@linaro.org, Mark Brown <broonie@kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Abhay_Salunke@dell.com, bjorn.andersson@linaro.org,
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On Fri, Feb 23, 2018 at 6:46 PM, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> Now that we have a kconfig checker just use that instead of relying
> on testing a sysfs directory being present, since our requirements
> are spelled out.

I don't see the reason to depend on config.gz, but it's a reasonable
requirement for a test build.

> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>

Acked-by: Kees Cook <keescook@chromium.org>

-Kees

> ---
>  tools/testing/selftests/firmware/fw_fallback.sh | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/firmware/fw_fallback.sh b/tools/testing/selftests/firmware/fw_fallback.sh
> index a42e437363d9..40b6c1d3e832 100755
> --- a/tools/testing/selftests/firmware/fw_fallback.sh
> +++ b/tools/testing/selftests/firmware/fw_fallback.sh
> @@ -49,10 +49,7 @@ kconfig_has()
>
>  DIR=/sys/devices/virtual/misc/test_firmware
>
> -# CONFIG_FW_LOADER_USER_HELPER has a sysfs class under /sys/class/firmware/
> -# These days no one enables CONFIG_FW_LOADER_USER_HELPER so check for that
> -# as an indicator for CONFIG_FW_LOADER_USER_HELPER.
> -HAS_FW_LOADER_USER_HELPER=$(if [ -d /sys/class/firmware/ ]; then echo yes; else echo no; fi)
> +HAS_FW_LOADER_USER_HELPER=$(kconfig_has CONFIG_FW_LOADER_USER_HELPER=y)
>  HAS_FW_LOADER_USER_HELPER_FALLBACK=$(kconfig_has CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y)
>
>  if [ "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then
> --
> 2.16.2
>


-- 
Kees Cook
Pixel Security