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-rw-r--r--drivers/mtd/ubi/build.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 09a326ecd05b..4048db83aef6 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -263,8 +263,12 @@ static ssize_t dev_attribute_show(struct device *dev,
return ret;
}
-/* Fake "release" method for UBI devices */
-static void dev_release(struct device *dev) { }
+static void dev_release(struct device *dev)
+{
+ struct ubi_device *ubi = container_of(dev, struct ubi_device, dev);
+
+ kfree(ubi);
+}
/**
* ubi_sysfs_init - initialize sysfs for an UBI device.
@@ -944,6 +948,12 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
if (ubi->bgt_thread)
kthread_stop(ubi->bgt_thread);
+ /*
+ * Get a reference to the device in order to prevent 'dev_release()'
+ * from freeing @ubi object.
+ */
+ get_device(&ubi->dev);
+
uif_close(ubi);
ubi_wl_close(ubi);
free_internal_volumes(ubi);
@@ -955,7 +965,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
vfree(ubi->dbg_peb_buf);
#endif
ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
- kfree(ubi);
+ put_device(&ubi->dev);
return 0;
}