sh: dma-sysfs: move to use bus_get_dev_root()

Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org
Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20230313182918.1312597-16-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
index 8ef318150f84db9a3d1df309f8462bfd5edf5bc4..431bc18f0a4119bdd11c2fd3c6c3e83a517bc6c1 100644 (file)
--- a/arch/sh/drivers/dma/dma-sysfs.c
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -45,13 +45,19 @@ static DEVICE_ATTR(devices, S_IRUGO, dma_show_devices, NULL);
 
 static int __init dma_subsys_init(void)
 {
+       struct device *dev_root;
        int ret;
 
        ret = subsys_system_register(&dma_subsys, NULL);
        if (unlikely(ret))
                return ret;
 
-       return device_create_file(dma_subsys.dev_root, &dev_attr_devices);
+       dev_root = bus_get_dev_root(&dma_subsys);
+       if (dev_root) {
+               ret = device_create_file(dev_root, &dev_attr_devices);
+               put_device(dev_root);
+       }
+       return ret;
 }
 postcore_initcall(dma_subsys_init);