linux-kernel - Re: [PATCH] omap3isp: wait for regulators to come up

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Date:   Sat, 4 Mar 2017 17:33:41 +0200
From:   Sakari Ailus <sakari.ailus@....fi>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Pavel Machek <pavel@....cz>, mchehab@...nel.org,
        kernel list <linux-kernel@...r.kernel.org>,
        ivo.g.dimitrov.75@...il.com, sre@...nel.org, pali.rohar@...il.com,
        linux-media@...r.kernel.org
Subject: Re: [PATCH] omap3isp: wait for regulators to come up

On Thu, Mar 02, 2017 at 04:46:42PM +0200, Laurent Pinchart wrote:
> Hi Pavel,
> 
> Thank you for the patch.
> 
> On Thursday 02 Mar 2017 13:45:32 Pavel Machek wrote:
> > If regulator returns -EPROBE_DEFER, we need to return it too, so that
> > omap3isp will be re-probed when regulator is ready.
> > 
> > Signed-off-by: Pavel Machek <pavel@....cz>
> > 
> > diff --git a/drivers/media/platform/omap3isp/ispccp2.c
> > b/drivers/media/platform/omap3isp/ispccp2.c index ca09523..b6e055e 100644
> > --- a/drivers/media/platform/omap3isp/ispccp2.c
> > +++ b/drivers/media/platform/omap3isp/ispccp2.c
> > @@ -1137,10 +1159,12 @@ int omap3isp_ccp2_init(struct isp_device *isp)
> >  	if (isp->revision == ISP_REVISION_2_0) {
> >  		ccp2->vdds_csib = devm_regulator_get(isp->dev, "vdds_csib");
> >  		if (IS_ERR(ccp2->vdds_csib)) {
> > +			if (PTR_ERR(ccp2->vdds_csib) == -EPROBE_DEFER)
> > +				return -EPROBE_DEFER;
> 
> This looks good to me, but it will result in the caller printing a "CCP2 
> initialization failed" error message, which I'm not sure is right. Maybe we 
> should move that message to the omap3isp_ccp2_init() function ?
> 
> In any case, this change is fine, so
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Applied to ccp2 branch with the error message moved. The old message is
still printed if the error code is different.

-- 
Sakari Ailus
e-mail: sakari.ailus@....fi	XMPP: sailus@...iisi.org.uk