s390/vfio-ap: 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@163.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Link: https://lore.kernel.org/r/20230319041941.259830-1-sensor1010@163.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/drivers/s390/crypto/vfio_ap_drv.c b/drivers/s390/crypto/vfio_ap_drv.c
index 997b524..9341c00 100644 (file)
--- 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 = {