[source] apm821xx: add back end-of-UBI marker for the WNDR4700 and MR24

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/8f2c2f94cf91476283ac2becb50f6d05482cd95f

commit 8f2c2f94cf91476283ac2becb50f6d05482cd95f
Author: Christian Lamparter <chunkeey at googlemail.com>
AuthorDate: Thu Nov 3 21:47:06 2016 +0100

    apm821xx: add back end-of-UBI marker for the WNDR4700 and MR24
    
    The patch "build: drop UBI EOF marker from images by default"
    (commit d27bce8d28eb129af0abd9c80a7756301b7d588a) removed the
    end-of-UBI marker. Without this marker, the boards will panic
    during boot:
    
    [    1.683458] ubi0: attaching mtd4
    [    1.696181] ubi0 warning: scan_peb: valid VID header but corrupted EC header at PEB 31
    [    1.704367] ubi0 error: scan_peb: bad image sequence number 549886691 in PEB 32, expected 184585623
    [    1.713377] Erase counter header dump:
    [    1.717110]  magic          0x55424923
    [    1.720843]  version        1
    [    1.723797]  ec             0
    [    1.726752]  vid_hdr_offset 512
    [    1.729880]  data_offset    2048
    [    1.733094]  image_seq      549886691
    [    1.736740]  hdr_crc        0x92ba8130
    [    1.740472] erase counter header hexdump:
    [    1.744493] ubi0 error: ubi_attach_mtd_dev: failed to attach mtd4, error -22
    [    1.751528] UBI error: cannot attach mtd4
    [    1.755373] hctosys: unable to open rtc device (rtc0)
    [    1.761130] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
    [    1.768604] Please append a correct "root=" boot option; here are the available partitions:
    [...]
    [    1.856992] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
    [    1.866519] Rebooting in 1 seconds..Auto calibration ---
    
    Signed-off-by: Christian Lamparter <chunkeey at gmail.com>
---
 target/linux/apm821xx/image/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/linux/apm821xx/image/Makefile b/target/linux/apm821xx/image/Makefile
index f8aecdd..c032c54 100644
--- a/target/linux/apm821xx/image/Makefile
+++ b/target/linux/apm821xx/image/Makefile
@@ -80,6 +80,7 @@ define Device/mr24
 		      MerakiAdd-dtb | pad-to 2047k | MerakiAdd-initramfs | \
 		      MerakiNAND
   IMAGE/sysupgrade.tar := sysupgrade-tar
+  UBINIZE_OPTS := -E 5
 endef
 TARGET_DEVICES += mr24
 
@@ -162,6 +163,7 @@ define Device/WNDR4700
   IMAGE/sysupgrade.tar := sysupgrade-tar
   NETGEAR_BOARD_ID := WNDR4700
   NETGEAR_HW_ID := 29763875+128+256
+  UBINIZE_OPTS := -E 5
 endef
 TARGET_DEVICES += WNDR4700