From: Boris Brezillon <boris.brezillon@bootlin.com>
Date: Sun, 2 Dec 2018 09:54:24 +0000 (+0100)
Subject: mtd: Delete partitions attached to the device when a device is deleted
X-Git-Url: http://git.dujemihanovic.xyz/login.html?a=commitdiff_plain;h=a02820fca90ce9ccf243b3fce59c04dabd5671a8;p=u-boot.git

mtd: Delete partitions attached to the device when a device is deleted

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>
Tested-by: Heiko Schocher <hs@denx.de>
---

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index 7a15ded8c8..cb7ca38d07 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -528,6 +528,13 @@ int del_mtd_device(struct mtd_info *mtd)
 	struct mtd_notifier *not;
 #endif
 
+	ret = del_mtd_partitions(mtd);
+	if (ret) {
+		debug("Failed to delete MTD partitions attached to %s (err %d)\n",
+		      mtd->name, ret);
+		return ret;
+	}
+
 	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 d20ebd8202..4d0096d9f1 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)			\