mtd: core: set some defaults when dev.parent is set

If a parent device is set, add_mtd_device() has enough knowledge to fill
in some sane default values for the module name and owner. Do so if they
aren't already set.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index ac280eef5ae85d5087f76f51191e3bc04819cdcd..bbcba0dbd5c3062e7da07979fb9c42af98558b54 100644 (file)
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -418,6 +418,15 @@ int add_mtd_device(struct mtd_info *mtd)
        mtd->erasesize_mask = (1 << mtd->erasesize_shift) - 1;
        mtd->writesize_mask = (1 << mtd->writesize_shift) - 1;
 
+       if (mtd->dev.parent) {
+               if (!mtd->owner && mtd->dev.parent->driver)
+                       mtd->owner = mtd->dev.parent->driver->owner;
+               if (!mtd->name)
+                       mtd->name = dev_name(mtd->dev.parent);
+       } else {
+               pr_debug("mtd device won't show a device symlink in sysfs\n");
+       }
+
        /* Some chips always power up locked. Unlock them now */
        if ((mtd->flags & MTD_WRITEABLE) && (mtd->flags & MTD_POWERUP_LOCK)) {
                error = mtd_unlock(mtd, 0, mtd->size);