linux-kernel - RE: [PATCH 2/3] rpmsg: Only invoke announce

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Date:   Tue, 10 Apr 2018 08:22:29 +0000
From:   Loic PALLARDY <loic.pallardy@...com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ohad Ben-Cohen <ohad@...ery.com>
CC:     "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: RE: [PATCH 2/3] rpmsg: Only invoke announce_create for rpdev with
 endpoints

Hi Bjorn,

> -----Original Message-----
> From: Loic PALLARDY
> Sent: Tuesday, April 03, 2018 11:13 AM
> To: 'Bjorn Andersson' <bjorn.andersson@...aro.org>; Ohad Ben-Cohen
> <ohad@...ery.com>
> Cc: linux-remoteproc@...r.kernel.org; linux-kernel@...r.kernel.org; linux-
> arm-msm@...r.kernel.org
> Subject: RE: [PATCH 2/3] rpmsg: Only invoke announce_create for rpdev with
> endpoints
> 
> Hi Bjorn,
> 
> > -----Original Message-----
> > From: linux-remoteproc-owner@...r.kernel.org [mailto:linux-
> remoteproc-
> > owner@...r.kernel.org] On Behalf Of Bjorn Andersson
> > Sent: Tuesday, March 27, 2018 11:07 PM
> > To: Ohad Ben-Cohen <ohad@...ery.com>; Bjorn Andersson
> > <bjorn.andersson@...aro.org>
> > Cc: linux-remoteproc@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-
> > arm-msm@...r.kernel.org
> > Subject: [PATCH 2/3] rpmsg: Only invoke announce_create for rpdev with
> > endpoints
> >
> > For special rpmsg devices without a primary endpoint there is nothing to
> > announce so don't call the backend announce create function if we didn't
> > create an endpoint.
> >
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > ---
> >  drivers/rpmsg/rpmsg_core.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
> > index dffa3aab7178..e85d2691d2cf 100644
> > --- a/drivers/rpmsg/rpmsg_core.c
> > +++ b/drivers/rpmsg/rpmsg_core.c
> > @@ -442,7 +442,7 @@ static int rpmsg_dev_probe(struct device *dev)
> >  		goto out;
> >  	}
> >
> > -	if (rpdev->ops->announce_create)
> > +	if (ept && rpdev->ops->announce_create)
> 
> This check is already part of virtio_rpmsg.c (see line 341)
> 	/* need to tell remote processor's name service about this channel ?
> */
> 	if (rpdev->announce && rpdev->ept &&
> 	    virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
> 
> should it be part of qcom_smd driver too? (but each implementation will
> duplicate checks)
> Or may have a generic check in the core including rpdev->announce as well
> (and doing virtio_rpmsg.c clean-up)
> 
> Change will become:
> 	if (rpdev->announce && ept && rpdev->ops->announce_create)
> 
> Regards,
> Loic

I'll appreciate if you reply to the review comments before merging patch and sending pull request.

Regards,
Loic

> >  		err = rpdev->ops->announce_create(rpdev);
> >  out:
> >  	return err;
> > --
> > 2.16.2
> >
> > --
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