target/linux/generic/pending-4.9/493-ubi-set-ROOT_DEV-to-ubiblock-rootfs-if-unset.patch

   1 From: Daniel Golle <daniel@makrotopia.org>
   2 Subject: ubi: set ROOT_DEV to ubiblock "rootfs" if unset
   3
   4 Signed-off-by: Daniel Golle <daniel@makrotopia.org>
   5 ---
   6  drivers/mtd/ubi/block.c | 10 ++++++++++
   7  1 file changed, 10 insertions(+)
   8
   9 --- a/drivers/mtd/ubi/block.c
  10 +++ b/drivers/mtd/ubi/block.c
  11 @@ -50,6 +50,7 @@
  12  #include <linux/scatterlist.h>
  13  #include <linux/idr.h>
  14  #include <asm/div64.h>
  15 +#include <linux/root_dev.h>
  16
  17  #include "ubi-media.h"
  18  #include "ubi.h"
  19 @@ -447,6 +448,15 @@ int ubiblock_create(struct ubi_volume_in
  20         dev_info(disk_to_dev(dev->gd), "created from ubi%d:%d(%s)",
  21                  dev->ubi_num, dev->vol_id, vi->name);
  22         mutex_unlock(&devices_mutex);
  23 +
  24 +       if (!strcmp(vi->name, "rootfs") &&
  25 +           IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
  26 +           ROOT_DEV == 0) {
  27 +               pr_notice("ubiblock: device ubiblock%d_%d (%s) set to be root filesystem\n",
  28 +                         dev->ubi_num, dev->vol_id, vi->name);
  29 +               ROOT_DEV = MKDEV(gd->major, gd->first_minor);
  30 +       }
  31 +
  32         return 0;
  33
  34  out_free_queue: