kernel: Copy patches from kernel 4.14 to 4.19

This just copies the files from the kernel 4.14 specific folders into
the kernel 4.19 specific folder, no changes are done to the files in
this commit.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 97 insertions, 0 deletions

diff --git a/target/linux/generic/pending-4.19/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch b/target/linux/generic/pending-4.19/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
new file mode 100644
index 0000000000..992aa4662e
--- /dev/null
+++ b/target/linux/generic/pending-4.19/490-ubi-auto-attach-mtd-device-named-ubi-or-data-on-boot.patch
@@ -0,0 +1,97 @@
+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
+@@ -1172,6 +1172,73 @@ 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;
+@@ -1255,6 +1322,12 @@ 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);