linux-kernel - Re: [PATCH v4] firmware_loader: Add debug message with checksum for FW file

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Date:   Fri, 17 Mar 2023 15:15:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Amadeusz Sławiński 
        <amadeuszx.slawinski@...ux.intel.com>
Cc:     Russ Weight <russell.h.weight@...el.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        linux-kernel@...r.kernel.org,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH v4] firmware_loader: Add debug message with checksum for
 FW file

On Fri, Mar 10, 2023 at 03:04:59PM +0100, Amadeusz Sławiński wrote:
> Enable dynamic-debug logging of firmware filenames and SHA256 checksums
> to clearly identify the firmware files that are loaded by the system.
> 
> Example output:
> [   34.944619] firmware_class:_request_firmware: i915 0000:00:02.0: Loaded FW: i915/kbl_dmc_ver1_04.bin, sha256: 2cde41c3e5ad181423bcc3e98ff9c49f743c88f18646af4d0b3c3a9664b831a1
> [   48.155884] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/cnl/dsp_basefw.bin, sha256: 43f6ac1b066e9bd0423d914960fbbdccb391af27d2b1da1085eee3ea8df0f357
> [   49.579540] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/rt274-tplg.bin, sha256: 4b3580da96dc3d2c443ba20c6728d8b665fceb3ed57223c3a57582bbad8e2413
> [   49.798196] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/hda-8086280c-tplg.bin, sha256: 5653172579b2be1b51fd69f5cf46e2bac8d63f2a1327924311c13b2f1fe6e601
> [   49.859627] firmware_class:_request_firmware: snd_soc_avs 0000:00:1f.3: Loaded FW: intel/avs/dmic-tplg.bin, sha256: 00fb7fbdb74683333400d7e46925dae60db448b88638efcca0b30215db9df63f
> 
> Reviewed-by: Cezary Rojewski <cezary.rojewski@...el.com>
> Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@...ux.intel.com>
> ---
> 
> Changes in v4:
>  * update menuconfig prompt and help message (Russ)
> 
> Changes in v3:
>  * add DYNAMIC_DEBUG and FW_LOADER as dependencies before option can be
> enabled (kernel test robot)
> 
> Changes in v2:
>  * allocate buffers (Greg)
>  * introduce CONFIG_ option to allow for CONFIG_CRYPTO and CONFIG_CRYPTO_SHA256
> dependencies without introducing circular dependency (Greg)
>  * add new line between includes and function name (Cezary)
> 
> ---
>  drivers/base/firmware_loader/Kconfig | 13 ++++++++
>  drivers/base/firmware_loader/main.c  | 48 +++++++++++++++++++++++++++-
>  2 files changed, 60 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/base/firmware_loader/Kconfig b/drivers/base/firmware_loader/Kconfig
> index 5166b323a0f8..6520e8c9cb38 100644
> --- a/drivers/base/firmware_loader/Kconfig
> +++ b/drivers/base/firmware_loader/Kconfig
> @@ -3,6 +3,7 @@ menu "Firmware loader"
>  
>  config FW_LOADER
>  	tristate "Firmware loading facility" if EXPERT
> +	select FW_LOADER_DEBUG if DYNAMIC_DEBUG

Why the select?  that prevents anyone from actually choosing this if
they want to or not.  It also prevents them from disabling this option
if they want to, while still keeping DYNAMIC_DEBUG enabled.

So please don't make this change.

thanks,

greg k-h