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SubjectRe: [PATCH v2 16/23] test_firmware: enable custom fallback testing on limited kernel configs
On Mon, Nov 20, 2017 at 10:24:02AM -0800, Luis R. Rodriguez wrote:
> When a kernel is not built with:
>
> CONFIG_HAS_FW_LOADER_USER_HELPER_FALLBACK=y
>
> We don't currently enable testing fw_fallback.sh. For kernels that
> still enable the fallback mechanism, its possible to use the async
> request firmware API call request_firmware_nowait() using the custom
> interface to use the fallback mechanism, so we should be able to test
> this but we currently cannot.
>
> We can enable testing without CONFIG_HAS_FW_LOADER_USER_HELPER_FALLBACK=y
> by relying on /proc/config.gz (CONFIG_IKCONFIG_PROC), if present. If you
> don't have this we'll have no option but to rely on old heuristics for now.
>
> Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
> ---
> tools/testing/selftests/firmware/config | 4 +++
> tools/testing/selftests/firmware/fw_fallback.sh | 45 ++++++++++++++++++++++++-
> 2 files changed, 48 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/firmware/config b/tools/testing/selftests/firmware/config
> index c8137f70e291..bf634dda0720 100644
> --- a/tools/testing/selftests/firmware/config
> +++ b/tools/testing/selftests/firmware/config
> @@ -1 +1,5 @@
> CONFIG_TEST_FIRMWARE=y
> +CONFIG_FW_LOADER=y
> +CONFIG_FW_LOADER_USER_HELPER=y
> +CONFIG_IKCONFIG=y
> +CONFIG_IKCONFIG_PROC=y
> diff --git a/tools/testing/selftests/firmware/fw_fallback.sh b/tools/testing/selftests/firmware/fw_fallback.sh
> index 722cad91df74..a42e437363d9 100755
> --- a/tools/testing/selftests/firmware/fw_fallback.sh
> +++ b/tools/testing/selftests/firmware/fw_fallback.sh
> @@ -6,7 +6,46 @@
> # won't find so that we can do the load ourself manually.
> set -e
>
> +PROC_CONFIG="/proc/config.gz"

How does this work when you are running the test on a target that does
not have this kernel build option?

thanks,

greg k-h

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