linux-kernel - Re: [PATCH v13 0/4] userspace MHI client interface driver

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Message-ID: <20201201112901.7f13e26c@kicinski-fedora-pc1c0hjn.DHCP.thefacebook.com>
Date:   Tue, 1 Dec 2020 11:29:01 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Hemant Kumar <hemantk@...eaurora.org>
Cc:     manivannan.sadhasivam@...aro.org, gregkh@...uxfoundation.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        jhugo@...eaurora.org, bbhatt@...eaurora.org,
        loic.poulain@...aro.org, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [PATCH v13 0/4] userspace MHI client interface driver

On Fri, 27 Nov 2020 19:26:02 -0800 Hemant Kumar wrote:
> This patch series adds support for UCI driver. UCI driver enables userspace
> clients to communicate to external MHI devices like modem and WLAN. UCI driver
> probe creates standard character device file nodes for userspace clients to
> perform open, read, write, poll and release file operations. These file
> operations call MHI core layer APIs to perform data transfer using MHI bus
> to communicate with MHI device. Patch is tested using arm64 based platform.

Wait, I thought this was for modems.

Why do WLAN devices need to communicate with user space?