4.5-rc0 regression: GPRS breaks after very short while

I was afraid another GSM chip desoldered itself in N900, but no, it seems to be software this time.

In 4.4, GPRS is rock solid, can survive overnight ping.

In 4.5-rc0 and v4.6, modem fails when I use gprs for like a minute. Phone is not usable.

Quoted 7 lines

I was afraid another GSM chip desoldered itself in N900, but no, it seems to be software this time.

In 4.4, GPRS is rock solid, can survive overnight ping.

In 4.5-rc0 and v4.6, modem fails when I use gprs for like a minute. Phone is not usable.

I only send three modem related changes for v4.5:

https://git.kernel.org/cgit/linux/kernel/git/sre/linux-hsi.git/commit/?h=hsi-for-4.5&id=525e1abc6b5a7d8bd9006de1da6e99722305ea2b
HSI: omap_ssi: fix handling ida_simple_get result

https://git.kernel.org/cgit/linux/kernel/git/sre/linux-hsi.git/commit/?h=hsi-for-4.5&id=6bf6ded3008a407ccab5ad72eb59ab71b97cc290
HSI: omap_ssi_port: fix handling of_get_named_gpio result

https://git.kernel.org/cgit/linux/kernel/git/sre/linux-hsi.git/commit/?h=hsi-for-4.5&id=403c5c0650816375527a6feecfb255d9b494dda3
HSI: Remove struct hsi_client private fields from kernel-doc

The last one only changes a comment, so not relevant, the other two fix error handling during initialization and are most likely also not the problem. Can you try to bisect the problem?

Quoted 3 lines

The last one only changes a comment, so not relevant, the other two fix error handling during initialization and are most likely also not the problem. Can you try to bisect the problem?

It will not be fun, but I guess it is doable. But before I start it would be good to know -- does it work for you?

Hi,

Quoted 6 lines · Pavel Machek

Quoted 3 lines

The last one only changes a comment, so not relevant, the other two fix error handling during initialization and are most likely also not the problem. Can you try to bisect the problem?

It will not be fun, but I guess it is doable. But before I start it would be good to know -- does it work for you?

I currently don't have a second SIM card with network access for my dev phone, so I usually only test without gprs connection. As a result I don't really know if longer data connection would work.

Also I'm quite busy until next weekend with other stuff. If you did not find anything until then, I will do some testing/debugging.