[PATCH 1/1] firmware: dmi-id: add product_family to modalias as pf

[PATCH 1/1] firmware: dmi-id: add product_family to modalias as pf

[Crag Wang]

Some devices require product_family information to trigger
conditional actions when the value matches a predefined criterion

$ cat /sys/class/dmi/id/product_family
Dell Pro Max Desktops

$ udevadm info -q all --path=/sys/class/dmi/id | grep MODALIAS
E: MODALIAS=dmi:bvnDellInc.:bvr0.59.39:bd12/16/2024:br0.59:efr0.0:svnDellInc.:pfDellProMaxDesktops:pnDellProMaxMicroFCM2250:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct3:cvr:sku0D14:

$ cat /sys/class/dmi/id/modalias
dmi:bvnDellInc.:bvr0.59.39:bd12/16/2024:br0.59:efr0.0:svnDellInc.:pfDellProMaxDesktops:pnDellProMaxMicroFCM2250:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct3:cvr:sku0D14:

Signed-off-by: Crag Wang <crag0715@gmail.com>
---
 drivers/firmware/dmi-id.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
index d19c78a78ae3..284652d75cc7 100644
--- a/drivers/firmware/dmi-id.c
+++ b/drivers/firmware/dmi-id.c
@@ -87,6 +87,7 @@ static ssize_t get_modalias(char *buffer, size_t buffer_size)
 		{ "br",  DMI_BIOS_RELEASE },
 		{ "efr", DMI_EC_FIRMWARE_RELEASE },
 		{ "svn", DMI_SYS_VENDOR },
+		{ "pf",  DMI_PRODUCT_FAMILY },
 		{ "pn",  DMI_PRODUCT_NAME },
 		{ "pvr", DMI_PRODUCT_VERSION },
 		{ "rvn", DMI_BOARD_VENDOR },
-- 
2.43.0

Re: [PATCH 1/1] firmware: dmi-id: add product_family to modalias as pf

[Jean DELVARE]

Hi Crag,

On Thu, 2025-08-14 at 14:44 +0800, Crag Wang wrote:
> Some devices require product_family information to trigger
> conditional actions when the value matches a predefined criterion
> 
> $ cat /sys/class/dmi/id/product_family
> Dell Pro Max Desktops
> 
> $ udevadm info -q all --path=/sys/class/dmi/id | grep MODALIAS
> E: MODALIAS=dmi:bvnDellInc.:bvr0.59.39:bd12/16/2024:br0.59:efr0.0:svnDellInc.:pfDellProMaxDesktops:pnDellProMaxMicroFCM2250:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct3:cvr:sku0D14:
> 
> $ cat /sys/class/dmi/id/modalias
> dmi:bvnDellInc.:bvr0.59.39:bd12/16/2024:br0.59:efr0.0:svnDellInc.:pfDellProMaxDesktops:pnDellProMaxMicroFCM2250:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct3:cvr:sku0D14:
> 
> Signed-off-by: Crag Wang <crag0715@gmail.com>
> ---
>  drivers/firmware/dmi-id.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
> index d19c78a78ae3..284652d75cc7 100644
> --- a/drivers/firmware/dmi-id.c
> +++ b/drivers/firmware/dmi-id.c
> @@ -87,6 +87,7 @@ static ssize_t get_modalias(char *buffer, size_t buffer_size)
>  		{ "br",  DMI_BIOS_RELEASE },
>  		{ "efr", DMI_EC_FIRMWARE_RELEASE },
>  		{ "svn", DMI_SYS_VENDOR },
> +		{ "pf",  DMI_PRODUCT_FAMILY },
>  		{ "pn",  DMI_PRODUCT_NAME },
>  		{ "pvr", DMI_PRODUCT_VERSION },
>  		{ "rvn", DMI_BOARD_VENDOR },

For consistency, I'd rather add it between DMI_PRODUCT_VERSION and
DMI_BOARD_VENDOR.

That's simple enough, so why not. Out of curiosity, which udev rule
(and/or driver) needs this?

-- 
Jean Delvare
SUSE L3 Support