um: ubd: Initialize ubd's disk pointer in ubd_add

[ Upstream commit df700802abcac3c7c4a4ced099aa42b9a144eea8 ]

Currently, the initialization of the disk pointer in the ubd structure
is missing. It should be initialized with the allocated gendisk pointer
in ubd_add().

Fixes: 32621ad7a7ea ("ubd: remove the ubd_gendisk array")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Link: https://patch.msgid.link/20241104163203.435515-2-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 119df766270021cbe72fbceebf002a73793031c8..2bfb17373244bbb49fce24d2072266eb71875713 100644 (file)
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -898,6 +898,8 @@ static int ubd_add(int n, char **error_out)
        if (err)
                goto out_cleanup_disk;
 
+       ubd_dev->disk = disk;
+
        return 0;
 
 out_cleanup_disk: