linux-kernel - Re: [PATCH v2 3/4] drm/bridge: imx-ldb-helper: Use dev_err

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Message-ID: <3553991.QJadu78ljV@steina-w>
Date: Wed, 08 Jan 2025 10:39:19 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Liu Ying <victor.liu@....com>
Cc: dri-devel@...ts.freedesktop.org, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] drm/bridge: imx-ldb-helper: Use dev_err_probe

Hi,

Am Mittwoch, 8. Januar 2025, 04:37:55 CET schrieb Liu Ying:
> On 01/07/2025, Alexander Stein wrote:
> > This simplifies the code and gives additional information upon deferral.
> > 
> > Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
> > ---
> >  drivers/gpu/drm/bridge/imx/imx-ldb-helper.c | 13 ++++---------
> >  1 file changed, 4 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
> > index 9b5bebbe357dd..2c9b862af74af 100644
> > --- a/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
> > +++ b/drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
> > @@ -167,7 +167,7 @@ int ldb_find_next_bridge_helper(struct ldb *ldb)
> >  {
> >  	struct device *dev = ldb->dev;
> >  	struct ldb_channel *ldb_ch;
> > -	int ret, i;
> > +	int i;
> >  
> >  	for (i = 0; i < MAX_LDB_CHAN_NUM; i++) {
> >  		ldb_ch = ldb->channel[i];
> > @@ -177,14 +177,9 @@ int ldb_find_next_bridge_helper(struct ldb *ldb)
> >  
> >  		ldb_ch->next_bridge = devm_drm_of_get_bridge(dev, ldb_ch->np,
> >  							     1, 0);
> > -		if (IS_ERR(ldb_ch->next_bridge)) {
> > -			ret = PTR_ERR(ldb_ch->next_bridge);
> > -			if (ret != -EPROBE_DEFER)
> > -				DRM_DEV_ERROR(dev,
> > -					      "failed to get next bridge: %d\n",
> > -					      ret);
> > -			return ret;
> > -		}
> > +		if (IS_ERR(ldb_ch->next_bridge))
> > +			return dev_err_probe(dev, PTR_ERR(ldb_ch->next_bridge),
> > +					     "failed to find next bridge\n");
> 
> Nit: s/find/get/, since "get" was used.

Thanks, you are right here. Adjusted.

> >  	}
> >  
> >  	return 0;
> 
> ldb_init_helper() may return -EPROBE_DEFER too, so it needs to be changed.

Thanks for spotting. Added dev_err_probe there as well.

Best regards,
Alexander
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