2 files changed, 39 insertions, 0 deletions

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index c4d26de74349..06ec9f836ae5 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -15,6 +15,7 @@
 #include <linux/timer.h>
 #include <linux/major.h>
 #include <linux/fs.h>
+#include <linux/err.h>
 #include <linux/ioctl.h>
 #include <linux/init.h>
 #include <linux/mtd/compatmac.h>
@@ -223,6 +224,42 @@ struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num)
         return ret;
 }
 
+/**
+ *      get_mtd_device_nm - obtain a validated handle for an MTD device by
+ *      device name
+ *      @name: MTD device name to open
+ *
+ *      This function returns MTD device description structure in case of
+ *      success and an error code in case of failure.
+ */
+
+struct mtd_info *get_mtd_device_nm(const char *name)
+{
+        int i;
+        struct mtd_info *mtd = ERR_PTR(-ENODEV);
+
+        mutex_lock(&mtd_table_mutex);
+
+        for (i = 0; i < MAX_MTD_DEVICES; i++) {
+                if (mtd_table[i] && !strcmp(name, mtd_table[i]->name)) {
+                        mtd = mtd_table[i];
+                        break;
+                }
+        }
+
+        if (i == MAX_MTD_DEVICES)
+                goto out_unlock;
+
+        if (!try_module_get(mtd->owner))
+                goto out_unlock;
+
+        mtd->usecount++;
+
+out_unlock:
+        mutex_unlock(&mtd_table_mutex);
+        return mtd;
+}
+
 void put_mtd_device(struct mtd_info *mtd)
 {
         int c;
@@ -267,6 +304,7 @@ int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
 EXPORT_SYMBOL(add_mtd_device);
 EXPORT_SYMBOL(del_mtd_device);
 EXPORT_SYMBOL(get_mtd_device);
+EXPORT_SYMBOL(get_mtd_device_nm);
 EXPORT_SYMBOL(put_mtd_device);
 EXPORT_SYMBOL(register_mtd_user);
 EXPORT_SYMBOL(unregister_mtd_user);
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 18acb6d0033b..89e937dfef55 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -216,6 +216,7 @@ extern int add_mtd_device(struct mtd_info *mtd);
 extern int del_mtd_device (struct mtd_info *mtd);
 
 extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num);
+extern struct mtd_info *get_mtd_device_nm(const char *name);
 
 extern void put_mtd_device(struct mtd_info *mtd);