linux-kernel - Re: [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface

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Date:   Sat, 28 Apr 2018 17:50:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sujeev Dias <sdias@...eaurora.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Tony Truong <truong@...eaurora.org>
Subject: Re: [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface

On Sat, Apr 28, 2018 at 07:28:17AM -0700, Sujeev Dias wrote:
> Thanks for quick feedback
> 
> 
> On 04/27/2018 12:22 AM, Greg Kroah-Hartman wrote:
> > On Thu, Apr 26, 2018 at 07:23:28PM -0700, Sujeev Dias wrote:
> > > MHI Host Interface is a communication protocol to be used by the host
> > > to control and communcate with modem over a high speed peripheral bus.
> > > This module will allow host to communicate with external devices that
> > > support MHI protocol.
> > > 
> > > Signed-off-by: Sujeev Dias <sdias@...eaurora.org>
> > No one else has ever reviewed this code before?  That's not good, please
> > at the very least, have someone else at your company go over it first.
> > I don't want to be the ones having to point out all of the "obvious"
> > issues :)
> > 
> This code has gone thru rigorous code review and testing, before I submit
> next patch I will have multiple people sign off on it.

Thank you.

> Intention was to completely compile out MHI_VERB messages because we have
> those messages in data path.  For release build, we wanted to reduce
> as much mips as possible.  However, for debugging these messages are
> extremely helpful.

That's exactly what dev_dbg() does today.  So please use it.

> I will look into tracepoints...

Or that, if you want them, they can be useful on data paths.

thanks,

greg k-h