linux-kernel - [PATCH v1] s390/vfio-ap-drv: Remove redundant driver match function

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Date:   Sun, 19 Mar 2023 12:19:41 +0800
From:   Lizhe <sensor1010@....com>
To:     akrowiak@...ux.ibm.com, pasic@...ux.ibm.com, jjherne@...ux.ibm.com,
        freude@...ux.ibm.com, hca@...ux.ibm.com, gor@...ux.ibm.com,
        agordeev@...ux.ibm.com, borntraeger@...ux.ibm.com,
        svens@...ux.ibm.com
Cc:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lizhe <sensor1010@....com>
Subject: [PATCH v1] s390/vfio-ap-drv: 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 matrix 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/s390/crypto/vfio_ap_drv.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
index 997b524bdd2b..9341c000da41 100644
--- a/drivers/s390/crypto/vfio_ap_drv.c
+++ b/drivers/s390/crypto/vfio_ap_drv.c
@@ -59,14 +59,8 @@ static void vfio_ap_matrix_dev_release(struct device *dev)
 	kfree(matrix_dev);
 }
 
-static int matrix_bus_match(struct device *dev, struct device_driver *drv)
-{
-	return 1;
-}
-
 static struct bus_type matrix_bus = {
 	.name = "matrix",
-	.match = &matrix_bus_match,
 };
 
 static struct device_driver matrix_driver = {
-- 
2.34.1