Try to detect broken AT-control based modems

[Dan Williams]

On Mon, 2018-04-30 at 13:11 +0200, Aleksander Morgado wrote:
> A short series of patches to improve the detection of broken modems.
> In this case, we try to detect modems that are still exposed in the
> USB layer but which don't reply to any of our AT commands.
> 
> The first patch is a small cleanup that I wouldn't mind to get
> included right away in git master. The second patch maybe we should
> delay it until 1.8 is released?
> 
> [PATCH 1/2] base-modem: improve broken modem detection logic
> [PATCH 2/2] base-modem: setup a maximum number of timeouts also for
> USB modems

Both seem reasonable to me, as does your commit plan.

Dan