ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/target/linux/generic/pending-5.4/494-mtd-ubi-add-EOF-marker-support.patch b/target/linux/generic/pending-5.4/494-mtd-ubi-add-EOF-marker-support.patch
new file mode 100644
index 0000000..fc48146
--- /dev/null
+++ b/target/linux/generic/pending-5.4/494-mtd-ubi-add-EOF-marker-support.patch
@@ -0,0 +1,60 @@
+From: Gabor Juhos <juhosg@openwrt.org>
+Subject: mtd: add EOF marker support to the UBI layer
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+---
+ drivers/mtd/ubi/attach.c | 25 ++++++++++++++++++++++---
+ drivers/mtd/ubi/ubi.h | 1 +
+ 2 files changed, 23 insertions(+), 3 deletions(-)
+
+--- a/drivers/mtd/ubi/attach.c
++++ b/drivers/mtd/ubi/attach.c
+@@ -926,6 +926,13 @@ static bool vol_ignored(int vol_id)
+ #endif
+ }
+
++static bool ec_hdr_has_eof(struct ubi_ec_hdr *ech)
++{
++ return ech->padding1[0] == 'E' &&
++ ech->padding1[1] == 'O' &&
++ ech->padding1[2] == 'F';
++}
++
+ /**
+ * scan_peb - scan and process UBI headers of a PEB.
+ * @ubi: UBI device description object
+@@ -958,9 +965,21 @@ static int scan_peb(struct ubi_device *u
+ return 0;
+ }
+
+- err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
+- if (err < 0)
+- return err;
++ if (!ai->eof_found) {
++ err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
++ if (err < 0)
++ return err;
++
++ if (ec_hdr_has_eof(ech)) {
++ pr_notice("UBI: EOF marker found, PEBs from %d will be erased\n",
++ pnum);
++ ai->eof_found = true;
++ }
++ }
++
++ if (ai->eof_found)
++ err = UBI_IO_FF_BITFLIPS;
++
+ switch (err) {
+ case 0:
+ break;
+--- a/drivers/mtd/ubi/ubi.h
++++ b/drivers/mtd/ubi/ubi.h
+@@ -780,6 +780,7 @@ struct ubi_attach_info {
+ int mean_ec;
+ uint64_t ec_sum;
+ int ec_count;
++ bool eof_found;
+ struct kmem_cache *aeb_slab_cache;
+ struct ubi_ec_hdr *ech;
+ struct ubi_vid_io_buf *vidb;