linux-kernel - Re: [PATCH v2 06/15] usb: misc: emi62: update to use usb_control_msg

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Message-ID: <X8pLDVCmLrhMi4No@localhost>
Date:   Fri, 4 Dec 2020 15:43:25 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Anant Thazhemadam <anant.thazhemadam@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 06/15] usb: misc: emi62: update to use
 usb_control_msg_send()

On Mon, Nov 30, 2020 at 06:59:25AM +0530, Anant Thazhemadam wrote:
> The newer usb_control_msg_{send|recv}() API are an improvement on the
> existing usb_control_msg() as it ensures that a short read/write is treated
> as an error, data can be used off the stack, and raw usb pipes need not be
> created in the calling functions.
> For this reason, the instance of usb_control_msg() has been replaced with
> usb_control_msg_send() appropriately.
> 
> Signed-off-by: Anant Thazhemadam <anant.thazhemadam@...il.com>
> ---

This driver looks like it shares origins with the emi26 one so the same
comments apply (and especially not put large structures on the stack).

Johan