linux-kernel - [PATCH v1] vfio/mdev: Remove redundant driver match function

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Date:   Sun, 19 Mar 2023 13:01:30 +0800
From:   Lizhe <sensor1010@....com>
To:     kwankhede@...dia.com, alex.williamson@...hat.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lizhe <sensor1010@....com>
Subject: [PATCH v1] vfio/mdev: Remove redundant driver match function

If there is no driver match function, the driver core assumes that each
candidate pair (driver, device) matches, see driver_match_device().

Drop the bus's match function that always returned 1 and so
implements the same behaviour as when there is no match function.

Signed-off-by: Lizhe <sensor1010@....com>
---
 drivers/vfio/mdev/mdev_driver.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c
index 7825d83a55f8..fafa4416aad9 100644
--- a/drivers/vfio/mdev/mdev_driver.c
+++ b/drivers/vfio/mdev/mdev_driver.c
@@ -31,20 +31,10 @@ static void mdev_remove(struct device *dev)
 		drv->remove(to_mdev_device(dev));
 }
 
-static int mdev_match(struct device *dev, struct device_driver *drv)
-{
-	/*
-	 * No drivers automatically match. Drivers are only bound by explicit
-	 * device_driver_attach()
-	 */
-	return 0;
-}
-
 struct bus_type mdev_bus_type = {
 	.name		= "mdev",
 	.probe		= mdev_probe,
 	.remove		= mdev_remove,
-	.match		= mdev_match,
 };
 
 /**
-- 
2.34.1