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From 08263a9ae664b24fa777d20b365601534842b236 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Wed, 21 Jun 2017 08:26:42 +0200
Subject: [PATCH] mtd: partitions: add helper for deleting partition
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
There are two similar functions handling deletion. One handles single
partition and another the whole MTD flash device. They share (duplicate)
some code so it makes sense to add a small helper for that part.
Function del_mtd_partitions has been moved a bit to keep all deleting
stuff together.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
drivers/mtd/mtdpart.c | 75 +++++++++++++++++++++++++++++----------------------
1 file changed, 43 insertions(+), 32 deletions(-)
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -363,32 +363,6 @@ static inline void free_partition(struct
kfree(p);
}
-/*
- * This function unregisters and destroy all slave MTD objects which are
- * attached to the given master MTD object.
- */
-
-int del_mtd_partitions(struct mtd_info *master)
-{
- struct mtd_part *slave, *next;
- int ret, err = 0;
-
- mutex_lock(&mtd_partitions_mutex);
- list_for_each_entry_safe(slave, next, &mtd_partitions, list)
- if (slave->master == master) {
- ret = del_mtd_device(&slave->mtd);
- if (ret < 0) {
- err = ret;
- continue;
- }
- list_del(&slave->list);
- free_partition(slave);
- }
- mutex_unlock(&mtd_partitions_mutex);
-
- return err;
-}
-
static struct mtd_part *allocate_partition(struct mtd_info *master,
const struct mtd_partition *part, int partno,
uint64_t cur_offset)
@@ -675,6 +649,48 @@ int mtd_add_partition(struct mtd_info *m
}
EXPORT_SYMBOL_GPL(mtd_add_partition);
+/**
+ * __mtd_del_partition - delete MTD partition
+ *
+ * @priv: internal MTD struct for partition to be deleted
+ *
+ * This function must be called with the partitions mutex locked.
+ */
+static int __mtd_del_partition(struct mtd_part *priv)
+{
+ int err;
+
+ err = del_mtd_device(&priv->mtd);
+ if (err)
+ return err;
+
+ list_del(&priv->list);
+ free_partition(priv);
+
+ return 0;
+}
+
+/*
+ * This function unregisters and destroy all slave MTD objects which are
+ * attached to the given master MTD object.
+ */
+int del_mtd_partitions(struct mtd_info *master)
+{
+ struct mtd_part *slave, *next;
+ int ret, err = 0;
+
+ mutex_lock(&mtd_partitions_mutex);
+ list_for_each_entry_safe(slave, next, &mtd_partitions, list)
+ if (slave->master == master) {
+ ret = __mtd_del_partition(slave);
+ if (ret < 0)
+ err = ret;
+ }
+ mutex_unlock(&mtd_partitions_mutex);
+
+ return err;
+}
+
int mtd_del_partition(struct mtd_info *master, int partno)
{
struct mtd_part *slave, *next;
@@ -686,12 +702,7 @@ int mtd_del_partition(struct mtd_info *m
(slave->mtd.index == partno)) {
sysfs_remove_files(&slave->mtd.dev.kobj,
mtd_partition_attrs);
- ret = del_mtd_device(&slave->mtd);
- if (ret < 0)
- break;
-
- list_del(&slave->list);
- free_partition(slave);
+ ret = __mtd_del_partition(slave);
break;
}
mutex_unlock(&mtd_partitions_mutex);
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