diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch')
-rw-r--r-- | target/linux/generic/pending-5.4/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/target/linux/generic/pending-5.4/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch b/target/linux/generic/pending-5.4/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch deleted file mode 100644 index b21daea4f0..0000000000 --- a/target/linux/generic/pending-5.4/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch +++ /dev/null @@ -1,97 +0,0 @@ -From: Daniel Golle <daniel@makrotopia.org> -Subject: ubi: auto-attach mtd device named "ubi" or "data" on boot - -Signed-off-by: Daniel Golle <daniel@makrotopia.org> ---- - drivers/mtd/ubi/build.c | 36 ++++++++++++++++++++++++++++++++++++ - 1 file changed, 36 insertions(+) - ---- a/drivers/mtd/ubi/build.c -+++ b/drivers/mtd/ubi/build.c -@@ -1168,6 +1168,73 @@ static struct mtd_info * __init open_mtd - 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; -+ loff_t offset = 0; -+ size_t len; -+ char magic[4]; -+ -+ /* 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)) -+ return; -+ -+ /* get the first not bad block */ -+ if (mtd_can_have_bb(mtd)) -+ while (mtd_block_isbad(mtd, offset)) { -+ offset += mtd->erasesize; -+ -+ if (offset > mtd->size) { -+ pr_err("UBI error: Failed to find a non-bad " -+ "block on mtd%d\n", mtd->index); -+ goto cleanup; -+ } -+ } -+ -+ /* check if the read from flash was successful */ -+ err = mtd_read(mtd, offset, 4, &len, (void *) magic); -+ if ((err && !mtd_is_bitflip(err)) || len != 4) { -+ pr_err("UBI error: unable to read from mtd%d\n", mtd->index); -+ goto cleanup; -+ } -+ -+ /* check for a valid ubi magic */ -+ if (strncmp(magic, "UBI#", 4)) { -+ pr_err("UBI error: no valid UBI magic found inside mtd%d\n", mtd->index); -+ goto cleanup; -+ } -+ -+ /* don't auto-add media types where UBI doesn't makes sense */ -+ if (mtd->type != MTD_NANDFLASH && -+ mtd->type != MTD_NORFLASH && -+ mtd->type != MTD_DATAFLASH && -+ mtd->type != MTD_MLCNANDFLASH) -+ goto cleanup; -+ -+ mutex_lock(&ubi_devices_mutex); -+ pr_notice("UBI: auto-attach mtd%d\n", mtd->index); -+ err = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 0); -+ mutex_unlock(&ubi_devices_mutex); -+ if (err < 0) { -+ pr_err("UBI error: cannot attach mtd%d\n", mtd->index); -+ goto cleanup; -+ } -+ -+ return; -+ -+cleanup: -+ put_mtd_device(mtd); -+} -+ - static int __init ubi_init(void) - { - int err, i, k; -@@ -1251,6 +1318,12 @@ 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 (IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && -+ !ubi_is_module() && !mtd_devs) -+ ubi_auto_attach(); -+ - err = ubiblock_init(); - if (err) { - pr_err("UBI error: block: cannot initialize, error %d\n", err); |