generic: early (incomplete!) 4.0 support

[openwrt/svn-archive/archive.git] / target / linux / generic / patches-4.0 / 492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch

diff --git a/target/linux/generic/patches-4.0/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch b/target/linux/generic/patches-4.0/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch
new file mode 100644 (file)
index 0000000..406737e
--- /dev/null
+++ b/target/linux/generic/patches-4.0/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch
@@ -0,0 +1,53 @@
+From eea9e1785e4c05c2a3444506aabafa0ae958538f Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Sat, 17 May 2014 03:35:02 +0200
+Subject: [PATCH 4/5] try auto-mounting ubi0:rootfs in init/do_mounts.c
+To: openwrt-devel@lists.openwrt.org
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ init/do_mounts.c | 26 +++++++++++++++++++++++++-
+ 1 file changed, 25 insertions(+), 1 deletion(-)
+
+--- a/init/do_mounts.c
++++ b/init/do_mounts.c
+@@ -435,7 +435,27 @@ retry:
+ out:
+       put_page(page);
+ }
+- 
++
++static int __init mount_ubi_rootfs(void)
++{
++      int flags = MS_SILENT;
++      int err, tried = 0;
++
++      while (tried < 2) {
++              err = do_mount_root("ubi0:rootfs", "ubifs", flags, \
++                                      root_mount_data);
++              switch (err) {
++                      case -EACCES:
++                              flags |= MS_RDONLY;
++                              tried++;
++                      default:
++                              return err;
++              }
++      }
++
++      return -EINVAL;
++}
++
+ #ifdef CONFIG_ROOT_NFS
+ 
+ #define NFSROOT_TIMEOUT_MIN   5
+@@ -529,6 +549,10 @@ void __init mount_root(void)
+                       change_floppy("root floppy");
+       }
+ #endif
++#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
++      if (!mount_ubi_rootfs())
++              return;
++#endif
+ #ifdef CONFIG_BLOCK
+       create_dev("/dev/root", ROOT_DEV);
+       mount_block_root("/dev/root", root_mountflags);