linux-kernel - Re: [PATCH v2 02/16] bus: mhi: core: Add support for registering MHI controllers

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Message-ID: <20200211184130.GA11908@Mani-XPS-13-9360>
Date:   Wed, 12 Feb 2020 00:11:30 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     arnd@...db.de, smohanad@...eaurora.org, jhugo@...eaurora.org,
        kvalo@...eaurora.org, bjorn.andersson@...aro.org,
        hemantk@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 02/16] bus: mhi: core: Add support for registering MHI
 controllers

Hi Greg,

On Thu, Feb 06, 2020 at 05:57:55PM +0100, Greg KH wrote:
> On Fri, Jan 31, 2020 at 07:19:55PM +0530, Manivannan Sadhasivam wrote:
> > --- /dev/null
> > +++ b/drivers/bus/mhi/core/init.c
> > @@ -0,0 +1,407 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
> > + *
> > + */
> > +
> > +#define dev_fmt(fmt) "MHI: " fmt
> 
> This should not be needed, right?  The bus/device name should give you
> all you need here from what I can tell.  So why is this needed?
> 

The log will have only the device name as like PCI-E. But that won't specify
where the error is coming from. Having "MHI" prefix helps the users to
quickly identify that the error is coming from MHI stack.

Thanks,
Mani

> thanks,
> 
> greg k-h