Currently ISAPNP devices do not generate an uevent for udev to
auto-load the driver modules for Creative SoundBlaster or Gravis
UltraSound to just work.

Signed-off-by: René Rebe <rene@exactco.de>
---
Tested for a while in T2/Linux already.
---
 drivers/pnp/driver.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 7de7aabb275e..05e9840bc3d4 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -150,6 +150,24 @@ static void pnp_device_shutdown(struct device *dev)
 		drv->shutdown(pnp_dev);
 }
 
+static int pnp_uevent(const struct device *dev, struct kobj_uevent_env *env)
+{
+	struct pnp_id *pos;
+	const struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+
+	if (!dev)
+		return -ENODEV;
+
+	pos = pnp_dev->id;
+	while (pos) {
+		if (add_uevent_var(env, "MODALIAS=pnp:d%s", pos->id))
+			return -ENOMEM;
+		pos = pos->next;
+	}
+
+	return 0;
+}
+
 static int pnp_bus_match(struct device *dev, const struct device_driver *drv)
 {
 	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
@@ -259,6 +277,7 @@ static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
 const struct bus_type pnp_bus_type = {
 	.name    = "pnp",
 	.match   = pnp_bus_match,
+	.uevent  = pnp_uevent,
 	.probe   = pnp_device_probe,
 	.remove  = pnp_device_remove,
 	.shutdown = pnp_device_shutdown,
-- 
2.46.0

-- 
René Rebe, ExactCODE GmbH, Berlin, Germany
https://exactco.de • https://t2linux.com • https://patreon.com/renerebe

On Tue, Nov 18, 2025 at 2:59 PM René Rebe <rene@exactco.de> wrote:
>
> Currently ISAPNP devices do not generate an uevent for udev to
> auto-load the driver modules for Creative SoundBlaster or Gravis
> UltraSound to just work.
>
> Signed-off-by: René Rebe <rene@exactco.de>
> ---
> Tested for a while in T2/Linux already.
> ---
>  drivers/pnp/driver.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
> index 7de7aabb275e..05e9840bc3d4 100644
> --- a/drivers/pnp/driver.c
> +++ b/drivers/pnp/driver.c
> @@ -150,6 +150,24 @@ static void pnp_device_shutdown(struct device *dev)
>                 drv->shutdown(pnp_dev);
>  }
>
> +static int pnp_uevent(const struct device *dev, struct kobj_uevent_env *env)
> +{
> +       struct pnp_id *pos;
> +       const struct pnp_dev *pnp_dev = to_pnp_dev(dev);
> +
> +       if (!dev)
> +               return -ENODEV;
> +
> +       pos = pnp_dev->id;
> +       while (pos) {
> +               if (add_uevent_var(env, "MODALIAS=pnp:d%s", pos->id))
> +                       return -ENOMEM;
> +               pos = pos->next;
> +       }
> +
> +       return 0;
> +}
> +
>  static int pnp_bus_match(struct device *dev, const struct device_driver *drv)
>  {
>         struct pnp_dev *pnp_dev = to_pnp_dev(dev);
> @@ -259,6 +277,7 @@ static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
>  const struct bus_type pnp_bus_type = {
>         .name    = "pnp",
>         .match   = pnp_bus_match,
> +       .uevent  = pnp_uevent,
>         .probe   = pnp_device_probe,
>         .remove  = pnp_device_remove,
>         .shutdown = pnp_device_shutdown,
> --

Applied as 6.19 material with minor edits in the subject, thanks!