[U-Boot] [PATCH v3 03/11] mtd: Delete partitions attached to the device when a device is deleted

[Boris Brezillon <boris.brezillon@bootlin.com>]

On Mon, 19 Nov 2018 21:59:47 +0100
Boris Brezillon <boris.brezillon@bootlin.com> wrote:

> If we don't do that, partitions might still be exposed while the
> underlying device is gone.
> 
> Fixes: 2a74930da57f ("mtd: mtdpart: implement proper partition handling")
> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
> ---
> Changes in v3:
> - None
> 
> Changes in v2:
> - Fix build failures when CONFIG_MTD_PARTITIONS is not enabled
> ---
>  drivers/mtd/mtdcore.c   |  1 +
>  include/linux/mtd/mtd.h | 15 +++++++++++++++
>  2 files changed, 16 insertions(+)
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index 7a15ded8c883..46657fe7c949 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -528,6 +528,7 @@ int del_mtd_device(struct mtd_info *mtd)
>  	struct mtd_notifier *not;
>  #endif
>  
> +	del_mtd_partitions(mtd);

We should check and propagate the error (if any).

	ret = del_mtd_partitions(mtd);
	if (ret)
		return ret;

I'll fix that in v4.

>  	mutex_lock(&mtd_table_mutex);
>  
>  	if (idr_find(&mtd_idr, mtd->index) != mtd) {
> diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
> index d20ebd820289..4d0096d9f1d8 100644
> --- a/include/linux/mtd/mtd.h
> +++ b/include/linux/mtd/mtd.h
> @@ -562,8 +562,23 @@ unsigned mtd_mmap_capabilities(struct mtd_info *mtd);
>  /* drivers/mtd/mtdcore.h */
>  int add_mtd_device(struct mtd_info *mtd);
>  int del_mtd_device(struct mtd_info *mtd);
> +
> +#ifdef CONFIG_MTD_PARTITIONS
>  int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int);
>  int del_mtd_partitions(struct mtd_info *);
> +#else
> +static inline int add_mtd_partitions(struct mtd_info *mtd,
> +				     const struct mtd_partition *parts,
> +				     int nparts)
> +{
> +	return 0;
> +}
> +
> +static inline int del_mtd_partitions(struct mtd_info *mtd)
> +{
> +	return 0;
> +}
> +#endif
>  
>  struct mtd_info *__mtd_next_device(int i);
>  #define mtd_for_each_device(mtd)			\