linux-kernel - Re: [PATCH] ASoC: soc-core: fix DMI handling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <2be82024-0a0b-56d4-ec3b-2faa284df8c7@nvidia.com>
Date:   Fri, 12 Mar 2021 14:44:35 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        <alsa-devel@...a-project.org>
CC:     <tiwai@...e.de>, <broonie@...nel.org>,
        <linux-kernel@...r.kernel.org>, Jean Delvare <jdelvare@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Subject: Re: [PATCH] ASoC: soc-core: fix DMI handling


On 10/03/2021 19:39, Pierre-Louis Bossart wrote:
> When DMI information is not present, trying to assign the card long
> name results in the following warning.
> 
> WARNING KERN tegra-audio-graph-card sound: ASoC: no DMI vendor name!
> 
> The initial solution suggested was to test if the card device is an
> ACPI one. This causes a regression visible to userspace on all Intel
> platforms, with UCM unable to load card profiles based on DMI
> information: the card devices are not necessarily ACPI ones, e.g. when
> the parent creates platform devices on Intel devices.
> 
> To fix this problem, this patch exports the existing dmi_available
> variable and tests it in the ASoC core.
> 
> Fixes: c014170408bc ("ASoC: soc-core: Prevent warning if no DMI table is present")
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> ---
>  drivers/firmware/dmi_scan.c | 1 +
>  sound/soc/soc-core.c        | 2 +-
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
> index d51ca0428bb8..f191a1f901ac 100644
> --- a/drivers/firmware/dmi_scan.c
> +++ b/drivers/firmware/dmi_scan.c
> @@ -166,6 +166,7 @@ static int __init dmi_checksum(const u8 *buf, u8 len)
>  static const char *dmi_ident[DMI_STRING_MAX];
>  static LIST_HEAD(dmi_devices);
>  int dmi_available;
> +EXPORT_SYMBOL_GPL(dmi_available);
>  
>  /*
>   *	Save a DMI string
> diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
> index 16ba54eb8164..c7e4600b2dd4 100644
> --- a/sound/soc/soc-core.c
> +++ b/sound/soc/soc-core.c
> @@ -1574,7 +1574,7 @@ int snd_soc_set_dmi_name(struct snd_soc_card *card, const char *flavour)
>  	if (card->long_name)
>  		return 0; /* long name already set by driver or from DMI */
>  
> -	if (!is_acpi_device_node(card->dev->fwnode))
> +	if (!dmi_available)
>  		return 0;
>  
>  	/* make up dmi long name as: vendor-product-version-board */
> 


Thanks for fixing.

Reviewed-by: Jon Hunter <jonathanh@...dia.com>
Tested-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon

-- 
nvpublic