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apm821xx: add size check for initramfs kernel for the Meraki MR24

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Russell Senior reported an issue with the MR24 initramfs kernels:
> ## Booting kernel from Legacy Image at 00c10000 ...
>   Image Name:   POWERPC LEDE Linux-4.4.19
>   Created:      2016-08-31  11:57:05 UTC
>   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>   Data Size:    2155723 Bytes = 2.1 MiB
>   Load Address: 00000000
>   Entry Point:  00000000
>   Verifying Checksum ... OK
>Wrong Ramdisk Image Format
>Ramdisk image is corrupt or invalid

For the MR24, the kernel is uploaded to 0x10000. The ramdisk starts
at 0x200000. This leaves the kernel with just 0x1f0000 bytes = 1984kb.
This patch adds a size check so the image creation script will abort
instead of producing a unbootable initramfs image. A separate patch
"apm821xx: Fix initramfs image for the Meraki MR24" which fixed the
reported issue was submitted earlier.

Cc: Russell Senior <russell@personaltelco.net>
Cc: Chris Blake <chrisrblake93@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
This commit is contained in:
Christian Lamparter 2016-09-02 22:35:03 +02:00 committed by John Crispin
parent bc36678bdb
commit 78e63ce7e3
1 changed files with 5 additions and 2 deletions
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7
target/linux/apm821xx/image/Makefile
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@ -72,10 +72,13 @@ define Device/mr24
BLOCKSIZE := 64512
IMAGES := sysupgrade.tar
DTB_SIZE := 64512
KERNEL_SIZE := 2048k
KERNEL_SIZE := 1984k
IMAGE_SIZE := 8191k
KERNEL := kernel-bin | lzma | uImage lzma | MerakiAdd-dtb | MerakiNAND
KERNEL_INITRAMFS := copy-file $(KDIR)/vmlinux | lzma | uImage lzma | MerakiAdd-dtb | pad-to 2047k | MerakiAdd-initramfs | MerakiNAND
KERNEL_INITRAMFS := copy-file $(KDIR)/vmlinux | lzma | uImage lzma | \
check-size $$(KERNEL_SIZE) | \
MerakiAdd-dtb | pad-to 2047k | MerakiAdd-initramfs | \
MerakiNAND
IMAGE/sysupgrade.tar := sysupgrade-tar
endef
TARGET_DEVICES += mr24