aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch')
-rw-r--r--target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch68
1 files changed, 68 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch b/target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
new file mode 100644
index 0000000000..440c6bf050
--- /dev/null
+++ b/target/linux/generic/patches-3.14/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
@@ -0,0 +1,68 @@
+From 8a52e4100d7c3a4a1dfddfa02b8864a9b0068c13 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Sat, 17 May 2014 03:36:18 +0200
+Subject: [PATCH 1/5] ubi: auto-attach mtd device named "ubi" or "data" on boot
+To: openwrt-devel@lists.openwrt.org
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ drivers/mtd/ubi/build.c | 36 ++++++++++++++++++++++++++++++++++++
+ 1 file changed, 36 insertions(+)
+
+diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
+index 6e30a3c..999a36b 100644
+--- a/drivers/mtd/ubi/build.c
++++ b/drivers/mtd/ubi/build.c
+@@ -1209,6 +1209,36 @@ static struct mtd_info * __init open_mtd_device(const char *mtd_dev)
+ return mtd;
+ }
+
++/*
++ * This function tries attaching mtd partitions named either "ubi" or "data"
++ * during boot.
++ */
++static void __init ubi_auto_attach(void)
++{
++ int err;
++ struct mtd_info *mtd;
++ /* try attaching mtd device named "ubi" or "data" */
++ mtd = open_mtd_device("ubi");
++ if (IS_ERR(mtd))
++ mtd = open_mtd_device("data");
++
++ if (!IS_ERR(mtd)) {
++ /* auto-add only media types where UBI makes sense */
++ if (mtd->type == MTD_NANDFLASH ||
++ mtd->type == MTD_DATAFLASH ||
++ mtd->type == MTD_MLCNANDFLASH) {
++ mutex_lock(&ubi_devices_mutex);
++ ubi_msg("auto-attach mtd%d", mtd->index);
++ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 0);
++ mutex_unlock(&ubi_devices_mutex);
++ if (err < 0) {
++ ubi_err("cannot attach mtd%d", mtd->index);
++ put_mtd_device(mtd);
++ }
++ }
++ }
++}
++
+ static int __init ubi_init(void)
+ {
+ int err, i, k;
+@@ -1298,6 +1328,12 @@ static int __init ubi_init(void)
+ }
+ }
+
++ /* auto-attach mtd devices only if built-in to the kernel and no ubi.mtd
++ * parameter was given */
++ if (config_enabled(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
++ !ubi_is_module() && !mtd_devs)
++ ubi_auto_attach();
++
+ err = ubiblock_init();
+ if (err) {
+ ubi_err("block: cannot initialize, error %d", err);
+--
+1.9.2
+