mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-30 02:29:01 +00:00
9a038e7fd1
Copy config and patches from kernel 5.10 to kernel 5.15 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
98 lines
2.5 KiB
Diff
98 lines
2.5 KiB
Diff
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
|
|
@@ -1192,6 +1192,73 @@ 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;
|
|
@@ -1275,6 +1342,12 @@ 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);
|