On Wed, 10 Mar 2021 20:39:27 +0100,
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.boss...@linux.intel.com>
Reviewed-by: Takashi Iwai <ti...@suse.de>
Takashi
> ---
> 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 */
> --
> 2.25.1
>
