Hello,

please integrate/backport the following commit into stable kernel release 4.4:

Commit-ID: 2b02c20ce0c28974b44e69a2e2f5ddc6a470ad6f (see https://github.com/torvalds/linux/commit/2b02c20ce0c28974b44e69a2e2f5ddc6a47...) Subject: "cdc_ncm: Set NTB format again after altsetting switch for Huawei devices"

(The patch has been submitted and merged into the mainline.)

We regard this commit as a fix/workaround for a change in firmware behavior observed in some recent huawei devices (e.g.: Huawei MS2131 LTE stick). As these devices are unusable with the 4.4.x LTS kernel we suggest to include this workarround as there will be more and more LTE sticks to expect until EOS in 2022... See also the mail below of the originator of the commit.

(It may also make sense to integrate it into the other stable kernel release)

Thank you very much!

Kind regards,

Matthias

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Sender: Enrico Mioso mrkiko.rs@gmail.com Date: 08.11.2017 23:21 Subject: Re: Question regarding commit: cdc_ncm: Set NTB format again after altsetting switch for Huawei devices

Hello Mathias. First of all, thank you for your interest in huawei_cdc_ncm driver and contacting me. This commit could be backported to 4.4 kernel, I didn't send that to stable@vger.kernel.org . Let me know if there are any difficulties doing so. Or I might do the submission in some days.

I think that commit could be related to a bug: even if it's arguable. That bug infact, is not related to the Linux kernel itself, but to the huawei firmware. So I don't think there will be a bug tracker entry.

Thanks for all, Enrico