linux-kernel - [PATCH V3 2/7] mdev: bus uevent support

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Message-Id: <20191011081557.28302-3-jasowang@redhat.com>
Date:   Fri, 11 Oct 2019 16:15:52 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     kvm@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org,
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        christophe.de.dinechin@...il.com, kevin.tian@...el.com,
        Jason Wang <jasowang@...hat.com>
Subject: [PATCH V3 2/7] mdev: bus uevent support

This patch adds bus uevent support for mdev bus in order to allow
cooperation with userspace.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vfio/mdev/mdev_driver.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c
index b7c40ce86ee3..319d886ffaf7 100644
--- a/drivers/vfio/mdev/mdev_driver.c
+++ b/drivers/vfio/mdev/mdev_driver.c
@@ -82,9 +82,17 @@ static int mdev_match(struct device *dev, struct device_driver *drv)
 	return 0;
 }
 
+static int mdev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct mdev_device *mdev = to_mdev_device(dev);
+
+	return add_uevent_var(env, "MODALIAS=mdev:c%02X", mdev->class_id);
+}
+
 struct bus_type mdev_bus_type = {
 	.name		= "mdev",
 	.match		= mdev_match,
+	.uevent		= mdev_uevent,
 	.probe		= mdev_probe,
 	.remove		= mdev_remove,
 };
-- 
2.19.1