ath9k: support for Extreme Networks AP3805i

Eugenio Tampieri eugenio at
Sat Feb 26 02:08:56 PST 2022

Sorry for resubmitting this but yesterday I submitted without a subject...
I'm a CS student and I've used OpenWrt for years. I'm writing to this 
mailing list because I'd like to contribute to the project by adding 
support of the aformentioned device.
 From what I can see, there's already an open PR 
( I've merged the current 
master into my fork ( and I've 
built it. I can boot it from ramdisk but as soon as I flash the 
sysupgrade I get this into the serial log:
 >|Kernel panic - not syncing: No working init found. Try passing init= 
option to kernel. See Linux Documentation/admin-guide/init.rst for 
As far as I can tell, the init var isn't passed from the bootloader 
(uboot), but how can I fix this?

Thanks to Benjamin Kallus we've found that the problem may lay here:

    [    0.433506] 0x000002280000-0x000003f40000 : "firmware"
    [    0.441125] 2 uimage-fw partitions found on MTD device firmware
    [    0.447182] Creating 2 MTD partitions on "firmware":
    [    0.452225] 0x000000000000-0x0000005c0000 : "kernel"
    [    0.458674] 0x0000005c0000-0x000001cc0000 : "rootfs"
    [    0.464437] mtd: device 12 (rootfs) set to be root filesystem
    [    0.471011] mtdsplit: no squashfs found in "rootfs"

When I download the mtdblock for rootfs, I get

    0             0x0             JFFS2 filesystem, big endian
    10223696      0x9C0050        Zlib compressed data, compressed
    10224308      0x9C02B4        Zlib compressed data, compressed
    10225004      0x9C056C        Zlib compressed data, compressed


Eugenio Tampieri

Il 25/02/22 14:23, Benjamin Kallus ha scritto:
> That's right; the rootfs doesn't need specific offsets, you just need 
> to tell the kernel which partition to use as the rootfs on the kernel 
> command line. Good luck getting things working!
> On Fri, Feb 25, 2022 at 1:15 PM Eugenio Tampieri 
> <eugenio at> wrote:
>     First of all, thanks for your reply.
>     Second thing, sorry for the empty subject in my previous email. I
>     was caught off guard by the (totally sane and agreeable) rejection
>     of multipart HTML emails so I missed the subject.
>     About the rootfs: I already have the dumps, just not with me. I'll
>     try with different offsets. Does the rootfs partition need to have
>     a particular label (i.e. rootfs)? I thought that by pointing the
>     bootloader to it was enough.
>     Thanks again,
>     Eugenio Tampieri

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