[U-Boot] [PATCH 3/9] mtd: Delete partitions attached to the device when a device is deleted

Boris Brezillon
2018-11-19T11:51:15Z

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 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);
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) \
--
2.17.1