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>
---
 arch/um/drivers/ubd_kern.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 2b8d04e67600..f19173da64d8 100644
--- 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:
-- 
2.34.1

On 04/11/2024 16:32, Tiwei Bie wrote:
> 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>
> ---
>   arch/um/drivers/ubd_kern.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
> index 2b8d04e67600..f19173da64d8 100644
> --- 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:

Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>

-- 
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/