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[23.128.96.18]) by mx.google.com with ESMTP id o9si8338424edq.412.2020.08.02.00.08.19; Sun, 02 Aug 2020 00:08:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726358AbgHBHIB (ORCPT + 99 others); Sun, 2 Aug 2020 03:08:01 -0400 Received: from asavdk3.altibox.net ([109.247.116.14]:55318 "EHLO asavdk3.altibox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725880AbgHBHIB (ORCPT ); Sun, 2 Aug 2020 03:08:01 -0400 Received: from ravnborg.org (unknown [188.228.123.71]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by asavdk3.altibox.net (Postfix) with ESMTPS id B9F9E20020; Sun, 2 Aug 2020 09:07:45 +0200 (CEST) Date: Sun, 2 Aug 2020 09:07:43 +0200 From: Sam Ravnborg To: Bernard Zhao Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Thierry Reding , David Airlie , Daniel Vetter , Linus Walleij , Jerry Han , Icenowy Zheng , Jagan Teki , Laurent Pinchart , Stefan Mavrodiev , Robert Chiras , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, opensource.kernel@vivo.com Subject: Re: [PATCH] drm/panel: remove return value of function drm_panel_add Message-ID: <20200802070743.GA822300@ravnborg.org> References: <20200801120216.8488-1-bernard@vivo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200801120216.8488-1-bernard@vivo.com> X-CMAE-Score: 0 X-CMAE-Analysis: v=2.3 cv=f+hm+t6M c=1 sm=1 tr=0 a=S6zTFyMACwkrwXSdXUNehg==:117 a=S6zTFyMACwkrwXSdXUNehg==:17 a=kj9zAlcOel0A:10 a=1WtWmnkvAAAA:8 a=gVjrpwQ8AGm25h8jbrwA:9 a=CjuIK1q_8ugA:10 a=-_UHfarfsM-RsASml2Jt:22 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Bernard. On Sat, Aug 01, 2020 at 08:02:13PM +0800, Bernard Zhao wrote: > The function "int drm_panel_add(struct drm_panel *panel)" > always returns 0, this return value is meaningless. > Also, there is no need to check return value which calls > "drm_panel_add and", error branch code will never run. Thanks for this nice cleanup. Applied to drm-misc-next - so it will appear in -next after the upcoming merge window and will hit upstream in 5.10 While applying I did the following modifications: - Fixed kernel-doc as the function returns a void - Fixed one panel that was missing the conversion - Fixed warnings due to unused labels If you are up to another cleanup task there is drm_panel_attach() and drm_panel_detach() which are no longer needed and all users and the empty implementations can be dropped. This will touch a lot of drivers so this change should be split in one patch/driver. bridge/* can be handled as one patch I think. imx/* is already done, awaiting to be applied. Sam > > Signed-off-by: Bernard Zhao > --- > drivers/gpu/drm/drm_panel.c | 4 +--- > drivers/gpu/drm/panel/panel-arm-versatile.c | 4 +++- > drivers/gpu/drm/panel/panel-boe-himax8279d.c | 4 +++- > drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 4 +++- > drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c | 4 +--- > drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c | 4 +--- > drivers/gpu/drm/panel/panel-ilitek-ili9322.c | 4 +++- > drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 4 +--- > drivers/gpu/drm/panel/panel-innolux-p079zca.c | 4 +--- > drivers/gpu/drm/panel/panel-jdi-lt070me05000.c | 4 ++-- > drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c | 4 +++- > drivers/gpu/drm/panel/panel-lg-lb035q02.c | 4 +++- > drivers/gpu/drm/panel/panel-lg-lg4573.c | 4 +++- > drivers/gpu/drm/panel/panel-lvds.c | 4 +--- > drivers/gpu/drm/panel/panel-nec-nl8048hl11.c | 4 +++- > drivers/gpu/drm/panel/panel-novatek-nt35510.c | 4 +--- > drivers/gpu/drm/panel/panel-novatek-nt39016.c | 6 +----- > drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c | 4 +++- > drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c | 4 +++- > drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c | 4 +++- > drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 4 +--- > drivers/gpu/drm/panel/panel-raydium-rm67191.c | 4 +--- > drivers/gpu/drm/panel/panel-ronbo-rb070d30.c | 4 +--- > drivers/gpu/drm/panel/panel-samsung-ld9040.c | 4 +++- > drivers/gpu/drm/panel/panel-samsung-s6d16d0.c | 4 +--- > drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c | 4 +--- > drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c | 4 +--- > drivers/gpu/drm/panel/panel-samsung-s6e63m0.c | 4 +++- > drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c | 6 +----- > drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c | 4 +--- > drivers/gpu/drm/panel/panel-seiko-43wvf1g.c | 4 +--- > drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c | 4 +++- > drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c | 4 +++- > drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 4 +++- > drivers/gpu/drm/panel/panel-simple.c | 4 +--- > drivers/gpu/drm/panel/panel-sitronix-st7701.c | 4 +--- > drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 4 +--- > drivers/gpu/drm/panel/panel-sony-acx424akp.c | 4 +--- > drivers/gpu/drm/panel/panel-sony-acx565akm.c | 7 +------ > drivers/gpu/drm/panel/panel-tpo-td028ttec1.c | 4 +++- > drivers/gpu/drm/panel/panel-tpo-td043mtea1.c | 6 +----- > drivers/gpu/drm/panel/panel-tpo-tpg110.c | 4 +++- > include/drm/drm_panel.h | 2 +- > 43 files changed, 80 insertions(+), 99 deletions(-) > > diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c > index 8c7bac85a793..fab41f63ad12 100644 > --- a/drivers/gpu/drm/drm_panel.c > +++ b/drivers/gpu/drm/drm_panel.c > @@ -73,13 +73,11 @@ EXPORT_SYMBOL(drm_panel_init); > * > * Return: 0 on success or a negative error code on failure. > */ > -int drm_panel_add(struct drm_panel *panel) > +void drm_panel_add(struct drm_panel *panel) > { > mutex_lock(&panel_lock); > list_add_tail(&panel->list, &panel_list); > mutex_unlock(&panel_lock); > - > - return 0; > } > EXPORT_SYMBOL(drm_panel_add); > > diff --git a/drivers/gpu/drm/panel/panel-arm-versatile.c b/drivers/gpu/drm/panel/panel-arm-versatile.c > index 41444a73c980..5aaee5414c40 100644 > --- a/drivers/gpu/drm/panel/panel-arm-versatile.c > +++ b/drivers/gpu/drm/panel/panel-arm-versatile.c > @@ -353,7 +353,9 @@ static int versatile_panel_probe(struct platform_device *pdev) > drm_panel_init(&vpanel->panel, dev, &versatile_panel_drm_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&vpanel->panel); > + drm_panel_add(&vpanel->panel); > + > + return 0; > } > > static const struct of_device_id versatile_panel_match[] = { > diff --git a/drivers/gpu/drm/panel/panel-boe-himax8279d.c b/drivers/gpu/drm/panel/panel-boe-himax8279d.c > index 74d58ee7d04c..e0630ce04147 100644 > --- a/drivers/gpu/drm/panel/panel-boe-himax8279d.c > +++ b/drivers/gpu/drm/panel/panel-boe-himax8279d.c > @@ -896,7 +896,9 @@ static int panel_add(struct panel_info *pinfo) > if (ret) > return ret; > > - return drm_panel_add(&pinfo->base); > + drm_panel_add(&pinfo->base); > + > + return 0; > } > > static int panel_probe(struct mipi_dsi_device *dsi) > diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c > index 2649469070aa..b9379ad92546 100644 > --- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c > +++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c > @@ -792,7 +792,9 @@ static int boe_panel_add(struct boe_panel *boe) > boe->base.funcs = &boe_panel_funcs; > boe->base.dev = &boe->dsi->dev; > > - return drm_panel_add(&boe->base); > + drm_panel_add(&boe->base); > + > + return 0; > } > > static int boe_panel_probe(struct mipi_dsi_device *dsi) > diff --git a/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c b/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c > index fddbfddf6566..7f2eb54e4254 100644 > --- a/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c > +++ b/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c > @@ -478,9 +478,7 @@ static int k101_im2ba02_dsi_probe(struct mipi_dsi_device *dsi) > if (ret) > return ret; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO; > dsi->format = MIPI_DSI_FMT_RGB888; > diff --git a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c > index 95b789ab9d29..2c168a405928 100644 > --- a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c > +++ b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c > @@ -225,9 +225,7 @@ static int feiyang_dsi_probe(struct mipi_dsi_device *dsi) > if (ret) > return ret; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST; > dsi->format = MIPI_DSI_FMT_RGB888; > diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c > index 873b1c7059bd..4a41d8734cc7 100644 > --- a/drivers/gpu/drm/panel/panel-ilitek-ili9322.c > +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9322.c > @@ -899,7 +899,9 @@ static int ili9322_probe(struct spi_device *spi) > drm_panel_init(&ili->panel, dev, &ili9322_drm_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&ili->panel); > + drm_panel_add(&ili->panel); > + > + return 0; > } > > static int ili9322_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > index f54077c216a3..52fd6f3d4452 100644 > --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > @@ -447,9 +447,7 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi) > if (ret) > return ret; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE; > dsi->format = MIPI_DSI_FMT_RGB888; > diff --git a/drivers/gpu/drm/panel/panel-innolux-p079zca.c b/drivers/gpu/drm/panel/panel-innolux-p079zca.c > index 7419f1f0acee..cc3e07b61a6c 100644 > --- a/drivers/gpu/drm/panel/panel-innolux-p079zca.c > +++ b/drivers/gpu/drm/panel/panel-innolux-p079zca.c > @@ -477,9 +477,7 @@ static int innolux_panel_add(struct mipi_dsi_device *dsi, > if (err) > return err; > > - err = drm_panel_add(&innolux->base); > - if (err < 0) > - return err; > + drm_panel_add(&innolux->base); > > mipi_dsi_set_drvdata(dsi, innolux); > innolux->link = dsi; > diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > index 4bfd8c877c8e..4fc2185575a7 100644 > --- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > +++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c > @@ -441,9 +441,9 @@ static int jdi_panel_add(struct jdi_panel *jdi) > drm_panel_init(&jdi->base, &jdi->dsi->dev, &jdi_panel_funcs, > DRM_MODE_CONNECTOR_DSI); > > - ret = drm_panel_add(&jdi->base); > + drm_panel_add(&jdi->base); > > - return ret; > + return 0; > } > > static void jdi_panel_del(struct jdi_panel *jdi) > diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c > index bac1a2a06c92..c75790f95461 100644 > --- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c > +++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c > @@ -383,7 +383,9 @@ static int kingdisplay_panel_add(struct kingdisplay_panel *kingdisplay) > if (err) > return err; > > - return drm_panel_add(&kingdisplay->base); > + drm_panel_add(&kingdisplay->base); > + > + return 0; > } > > static void kingdisplay_panel_del(struct kingdisplay_panel *kingdisplay) > diff --git a/drivers/gpu/drm/panel/panel-lg-lb035q02.c b/drivers/gpu/drm/panel/panel-lg-lb035q02.c > index e90efeaba4ad..8cb403ed2d5f 100644 > --- a/drivers/gpu/drm/panel/panel-lg-lb035q02.c > +++ b/drivers/gpu/drm/panel/panel-lg-lb035q02.c > @@ -199,7 +199,9 @@ static int lb035q02_probe(struct spi_device *spi) > drm_panel_init(&lcd->panel, &lcd->spi->dev, &lb035q02_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&lcd->panel); > + drm_panel_add(&lcd->panel); > + > + return 0; > } > > static int lb035q02_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-lg-lg4573.c b/drivers/gpu/drm/panel/panel-lg-lg4573.c > index 5907f2503755..02e8e593ba17 100644 > --- a/drivers/gpu/drm/panel/panel-lg-lg4573.c > +++ b/drivers/gpu/drm/panel/panel-lg-lg4573.c > @@ -262,7 +262,9 @@ static int lg4573_probe(struct spi_device *spi) > drm_panel_init(&ctx->panel, &spi->dev, &lg4573_drm_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&ctx->panel); > + drm_panel_add(&ctx->panel); > + > + return 0; > } > > static int lg4573_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-lvds.c b/drivers/gpu/drm/panel/panel-lvds.c > index 5ce3f4a2b7a1..41305c3dcf31 100644 > --- a/drivers/gpu/drm/panel/panel-lvds.c > +++ b/drivers/gpu/drm/panel/panel-lvds.c > @@ -227,9 +227,7 @@ static int panel_lvds_probe(struct platform_device *pdev) > if (ret) > return ret; > > - ret = drm_panel_add(&lvds->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&lvds->panel); > > dev_set_drvdata(lvds->dev, lvds); > return 0; > diff --git a/drivers/gpu/drm/panel/panel-nec-nl8048hl11.c b/drivers/gpu/drm/panel/panel-nec-nl8048hl11.c > index c4f83f6384e1..8217cb9a0658 100644 > --- a/drivers/gpu/drm/panel/panel-nec-nl8048hl11.c > +++ b/drivers/gpu/drm/panel/panel-nec-nl8048hl11.c > @@ -208,7 +208,9 @@ static int nl8048_probe(struct spi_device *spi) > drm_panel_init(&lcd->panel, &lcd->spi->dev, &nl8048_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&lcd->panel); > + drm_panel_add(&lcd->panel); > + > + return 0; > } > > static int nl8048_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35510.c b/drivers/gpu/drm/panel/panel-novatek-nt35510.c > index 4a8fa908a2cf..9a701a30fe04 100644 > --- a/drivers/gpu/drm/panel/panel-novatek-nt35510.c > +++ b/drivers/gpu/drm/panel/panel-novatek-nt35510.c > @@ -956,9 +956,7 @@ static int nt35510_probe(struct mipi_dsi_device *dsi) > nt->panel.backlight = bl; > } > > - ret = drm_panel_add(&nt->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&nt->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) > diff --git a/drivers/gpu/drm/panel/panel-novatek-nt39016.c b/drivers/gpu/drm/panel/panel-novatek-nt39016.c > index 05cae8d62d56..9957b846bcff 100644 > --- a/drivers/gpu/drm/panel/panel-novatek-nt39016.c > +++ b/drivers/gpu/drm/panel/panel-novatek-nt39016.c > @@ -303,11 +303,7 @@ static int nt39016_probe(struct spi_device *spi) > drm_panel_init(&panel->drm_panel, dev, &nt39016_funcs, > DRM_MODE_CONNECTOR_DPI); > > - err = drm_panel_add(&panel->drm_panel); > - if (err < 0) { > - dev_err(dev, "Failed to register panel"); > - return err; > - } > + drm_panel_add(&panel->drm_panel); > > return 0; > } > diff --git a/drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c b/drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c > index 09deb99981a4..2edda548fffd 100644 > --- a/drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c > +++ b/drivers/gpu/drm/panel/panel-olimex-lcd-olinuxino.c > @@ -284,7 +284,9 @@ static int lcd_olinuxino_probe(struct i2c_client *client, > if (ret) > return ret; > > - return drm_panel_add(&lcd->panel); > + drm_panel_add(&lcd->panel); > + > + return 0; > } > > static int lcd_olinuxino_remove(struct i2c_client *client) > diff --git a/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c b/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c > index 3a0229d60095..4fbf12ee858e 100644 > --- a/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c > +++ b/drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c > @@ -165,7 +165,9 @@ static int osd101t2587_panel_add(struct osd101t2587_panel *osd101t2587) > if (ret) > return ret; > > - return drm_panel_add(&osd101t2587->base); > + drm_panel_add(&osd101t2587->base); > + > + return 0; > } > > static int osd101t2587_panel_probe(struct mipi_dsi_device *dsi) > diff --git a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c > index 69693451462e..368722d98faf 100644 > --- a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c > +++ b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c > @@ -207,7 +207,9 @@ static int wuxga_nt_panel_add(struct wuxga_nt_panel *wuxga_nt) > if (ret) > return ret; > > - return drm_panel_add(&wuxga_nt->base); > + drm_panel_add(&wuxga_nt->base); > + > + return 0; > } > > static void wuxga_nt_panel_del(struct wuxga_nt_panel *wuxga_nt) > diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > index 8f078b7dd89e..25112e5b353b 100644 > --- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > +++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c > @@ -429,9 +429,7 @@ static int rpi_touchscreen_probe(struct i2c_client *i2c, > /* This appears last, as it's what will unblock the DSI host > * driver's component bind function. > */ > - ret = drm_panel_add(&ts->base); > - if (ret) > - return ret; > + drm_panel_add(&ts->base); > > return 0; > > diff --git a/drivers/gpu/drm/panel/panel-raydium-rm67191.c b/drivers/gpu/drm/panel/panel-raydium-rm67191.c > index 313637d53d28..055201534bf5 100644 > --- a/drivers/gpu/drm/panel/panel-raydium-rm67191.c > +++ b/drivers/gpu/drm/panel/panel-raydium-rm67191.c > @@ -610,9 +610,7 @@ static int rad_panel_probe(struct mipi_dsi_device *dsi) > DRM_MODE_CONNECTOR_DSI); > dev_set_drvdata(dev, panel); > > - ret = drm_panel_add(&panel->panel); > - if (ret) > - return ret; > + drm_panel_add(&panel->panel); > > ret = mipi_dsi_attach(dsi); > if (ret) > diff --git a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c > index ef18559e237e..6298051c7244 100644 > --- a/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c > +++ b/drivers/gpu/drm/panel/panel-ronbo-rb070d30.c > @@ -201,9 +201,7 @@ static int rb070d30_panel_dsi_probe(struct mipi_dsi_device *dsi) > if (ret) > return ret; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM; > dsi->format = MIPI_DSI_FMT_RGB888; > diff --git a/drivers/gpu/drm/panel/panel-samsung-ld9040.c b/drivers/gpu/drm/panel/panel-samsung-ld9040.c > index 9bb2e8c7934a..358168ed8355 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-ld9040.c > +++ b/drivers/gpu/drm/panel/panel-samsung-ld9040.c > @@ -354,7 +354,9 @@ static int ld9040_probe(struct spi_device *spi) > drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&ctx->panel); > + drm_panel_add(&ctx->panel); > + > + return 0; > } > > static int ld9040_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c b/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c > index 2150043dcf6b..72c26a63dbe5 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6d16d0.c > @@ -218,9 +218,7 @@ static int s6d16d0_probe(struct mipi_dsi_device *dsi) > drm_panel_init(&s6->panel, dev, &s6d16d0_drm_funcs, > DRM_MODE_CONNECTOR_DSI); > > - ret = drm_panel_add(&s6->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&s6->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c > index 36ebd5a4ac7b..d242b2f5f2d8 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c > @@ -735,9 +735,7 @@ static int s6e3ha2_probe(struct mipi_dsi_device *dsi) > drm_panel_init(&ctx->panel, dev, &s6e3ha2_drm_funcs, > DRM_MODE_CONNECTOR_DSI); > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - goto unregister_backlight; > + drm_panel_add(&ctx->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c > index a3570e0a90a8..0c60f61015ff 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c > @@ -480,9 +480,7 @@ static int s6e63j0x03_probe(struct mipi_dsi_device *dsi) > ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS; > ctx->bl_dev->props.power = FB_BLANK_POWERDOWN; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - goto unregister_backlight; > + drm_panel_add(&ctx->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c > index a5f76eb4fa25..40f2f427dc91 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0.c > @@ -480,7 +480,9 @@ static int s6e63m0_probe(struct spi_device *spi) > if (ret < 0) > return ret; > > - return drm_panel_add(&ctx->panel); > + drm_panel_add(&ctx->panel); > + > + return 0; > } > > static int s6e63m0_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c > index 9d843fcc3a22..e17ba1d84481 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c > @@ -243,11 +243,7 @@ static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi) > drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs, > DRM_MODE_CONNECTOR_DSI); > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) { > - dev_err(dev, "Failed to add panel: %d\n", ret); > - return ret; > - } > + drm_panel_add(&ctx->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) { > diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c > index 8a028d2bd0d6..e36cb1a25318 100644 > --- a/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c > +++ b/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c > @@ -1020,9 +1020,7 @@ static int s6e8aa0_probe(struct mipi_dsi_device *dsi) > drm_panel_init(&ctx->panel, dev, &s6e8aa0_drm_funcs, > DRM_MODE_CONNECTOR_DSI); > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) > diff --git a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c > index 40fcbbbacb2c..46428b513a5d 100644 > --- a/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c > +++ b/drivers/gpu/drm/panel/panel-seiko-43wvf1g.c > @@ -257,9 +257,7 @@ static int seiko_panel_probe(struct device *dev, > if (err) > return err; > > - err = drm_panel_add(&panel->base); > - if (err < 0) > - return err; > + drm_panel_add(&panel->base); > > dev_set_drvdata(dev, panel); > > diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c > index b5d1977221a7..9727d3748034 100644 > --- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c > +++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c > @@ -326,7 +326,9 @@ static int sharp_panel_add(struct sharp_panel *sharp) > if (ret) > return ret; > > - return drm_panel_add(&sharp->base); > + drm_panel_add(&sharp->base); > + > + return 0; > } > > static void sharp_panel_del(struct sharp_panel *sharp) > diff --git a/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c b/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c > index 1cf3f02435c1..be5cdadf5147 100644 > --- a/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c > +++ b/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c > @@ -188,7 +188,9 @@ static int ls037v7dw01_probe(struct platform_device *pdev) > drm_panel_init(&lcd->panel, &pdev->dev, &ls037v7dw01_funcs, > DRM_MODE_CONNECTOR_DPI); > > - return drm_panel_add(&lcd->panel); > + drm_panel_add(&lcd->panel); > + > + return 0; > } > > static int ls037v7dw01_remove(struct platform_device *pdev) > diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c > index ce586c6d70c7..730efc3d6984 100644 > --- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c > +++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c > @@ -262,7 +262,9 @@ static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt) > if (ret) > return ret; > > - return drm_panel_add(&sharp_nt->base); > + drm_panel_add(&sharp_nt->base); > + > + return 0; > } > > static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt) > diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c > index 4aeb960ccf15..b290b2b966c2 100644 > --- a/drivers/gpu/drm/panel/panel-simple.c > +++ b/drivers/gpu/drm/panel/panel-simple.c > @@ -555,9 +555,7 @@ static int panel_simple_probe(struct device *dev, const struct panel_desc *desc) > if (err) > goto free_ddc; > > - err = drm_panel_add(&panel->base); > - if (err < 0) > - goto free_ddc; > + drm_panel_add(&panel->base); > > dev_set_drvdata(dev, panel); > > diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c > index 4b4f2558e3b4..66030978bcf9 100644 > --- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c > +++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c > @@ -380,9 +380,7 @@ static int st7701_dsi_probe(struct mipi_dsi_device *dsi) > if (ret) > return ret; > > - ret = drm_panel_add(&st7701->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&st7701->panel); > > mipi_dsi_set_drvdata(dsi, st7701); > st7701->dsi = dsi; > diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c > index cc02c54c1b2e..6ed8c9823ee6 100644 > --- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c > +++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c > @@ -383,9 +383,7 @@ static int st7789v_probe(struct spi_device *spi) > if (ret) > return ret; > > - ret = drm_panel_add(&ctx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&ctx->panel); > > return 0; > } > diff --git a/drivers/gpu/drm/panel/panel-sony-acx424akp.c b/drivers/gpu/drm/panel/panel-sony-acx424akp.c > index c91e55b2d7a3..4c46ed9b3f6d 100644 > --- a/drivers/gpu/drm/panel/panel-sony-acx424akp.c > +++ b/drivers/gpu/drm/panel/panel-sony-acx424akp.c > @@ -506,9 +506,7 @@ static int acx424akp_probe(struct mipi_dsi_device *dsi) > acx->bl->props.brightness = 512; > acx->bl->props.power = FB_BLANK_POWERDOWN; > > - ret = drm_panel_add(&acx->panel); > - if (ret < 0) > - return ret; > + drm_panel_add(&acx->panel); > > ret = mipi_dsi_attach(dsi); > if (ret < 0) { > diff --git a/drivers/gpu/drm/panel/panel-sony-acx565akm.c b/drivers/gpu/drm/panel/panel-sony-acx565akm.c > index 5c4b6f6e5c2d..08442104dc43 100644 > --- a/drivers/gpu/drm/panel/panel-sony-acx565akm.c > +++ b/drivers/gpu/drm/panel/panel-sony-acx565akm.c > @@ -651,12 +651,7 @@ static int acx565akm_probe(struct spi_device *spi) > drm_panel_init(&lcd->panel, &lcd->spi->dev, &acx565akm_funcs, > DRM_MODE_CONNECTOR_DPI); > > - ret = drm_panel_add(&lcd->panel); > - if (ret < 0) { > - if (lcd->has_bc) > - acx565akm_backlight_cleanup(lcd); > - return ret; > - } > + drm_panel_add(&lcd->panel); > > return 0; > } > diff --git a/drivers/gpu/drm/panel/panel-tpo-td028ttec1.c b/drivers/gpu/drm/panel/panel-tpo-td028ttec1.c > index aeca15dfeb3c..5f4001a21a04 100644 > --- a/drivers/gpu/drm/panel/panel-tpo-td028ttec1.c > +++ b/drivers/gpu/drm/panel/panel-tpo-td028ttec1.c > @@ -351,7 +351,9 @@ static int td028ttec1_probe(struct spi_device *spi) > if (ret) > return ret; > > - return drm_panel_add(&lcd->panel); > + drm_panel_add(&lcd->panel); > + > + return 0; > } > > static int td028ttec1_remove(struct spi_device *spi) > diff --git a/drivers/gpu/drm/panel/panel-tpo-td043mtea1.c b/drivers/gpu/drm/panel/panel-tpo-td043mtea1.c > index 75f1f1f1b6de..1d7a0df1680e 100644 > --- a/drivers/gpu/drm/panel/panel-tpo-td043mtea1.c > +++ b/drivers/gpu/drm/panel/panel-tpo-td043mtea1.c > @@ -461,11 +461,7 @@ static int td043mtea1_probe(struct spi_device *spi) > drm_panel_init(&lcd->panel, &lcd->spi->dev, &td043mtea1_funcs, > DRM_MODE_CONNECTOR_DPI); > > - ret = drm_panel_add(&lcd->panel); > - if (ret < 0) { > - sysfs_remove_group(&spi->dev.kobj, &td043mtea1_attr_group); > - return ret; > - } > + drm_panel_add(&lcd->panel); > > return 0; > } > diff --git a/drivers/gpu/drm/panel/panel-tpo-tpg110.c b/drivers/gpu/drm/panel/panel-tpo-tpg110.c > index 8472d018c16f..b54dfcc5b3ef 100644 > --- a/drivers/gpu/drm/panel/panel-tpo-tpg110.c > +++ b/drivers/gpu/drm/panel/panel-tpo-tpg110.c > @@ -453,7 +453,9 @@ static int tpg110_probe(struct spi_device *spi) > > spi_set_drvdata(spi, tpg); > > - return drm_panel_add(&tpg->panel); > + drm_panel_add(&tpg->panel); > + > + return 0; > } > > static int tpg110_remove(struct spi_device *spi) > diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h > index 6193cb555acc..ff066524cb70 100644 > --- a/include/drm/drm_panel.h > +++ b/include/drm/drm_panel.h > @@ -175,7 +175,7 @@ void drm_panel_init(struct drm_panel *panel, struct device *dev, > const struct drm_panel_funcs *funcs, > int connector_type); > > -int drm_panel_add(struct drm_panel *panel); > +void drm_panel_add(struct drm_panel *panel); > void drm_panel_remove(struct drm_panel *panel); > > int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector); > -- > 2.17.1