[LEDE-DEV] [RFC] brcm47xx: bump kernel to 4.4

[Rafał Miłecki]

On 25 October 2016 at 09:55, Hannu Nyman <hannu.nyman at iki.fi> wrote:
> On 25.10.2016 9:13, p.wassi at gmx.at wrote:
>>>
>>> It seems I'm experiencing the same crazy problem. Local builds work
>>> for me (as explained in commit message), but image from buildbot
>>> doesn't boot. This is some totally crazy thing :|
>>
>> I opt for staying at 4.4 and not reverting, since the issue already
>> occured
>> on kernel 4.1 for the WRT54GL (and probably other devices as well?).
>> So it's _not_ a 4.1 -> 4.4 issue! The last kernel, that booted fine
>> on my devices (with buildbot images) was OpenWRT 15.05.1 - 3.18.23
>> As you've experienced yourself: local images also work fine. With 4.1 and
>> 4.4.
>
>
> This freezing after "> Starting program at 0x80001000" reminds me of an old
> issue on ar71xx/WNDR3700:
>
> This might be something related to uncompressing the image by the
> bootloader. Kernel & firmware size growth may be exposing some
> compression/uncompression problem that gets semi-arbitrarily triggered now
> (when the images sizes have grown due to kernel size growth?). It is
> possible that the old bootloader fails to decompress the image but has no
> proper verbose error message about that.

For Linksys WRT300N v1 we use lzma-loader compressed using gzip. It
didn't change between 4.1 and 4.4.

So CFE decompression doesn't matter as it deals with the same loader.
If there is some decompression bug it may be inside lzma-loader.

-- 
Rafał