linux-kernel - [kbingham-rcar:kbingham/drm-misc/next/sn65dsi86/hpd 9/21] drivers/gpu/drm/bridge/ti-sn65dsi86.c:736:1: sparse: sparse: unused label 'err_conn

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Date:   Tue, 28 Jun 2022 10:19:53 +0800
From:   kernel test robot <yujie.liu@...el.com>
To:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
CC:     <kbuild-all@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [kbingham-rcar:kbingham/drm-misc/next/sn65dsi86/hpd 9/21]
 drivers/gpu/drm/bridge/ti-sn65dsi86.c:736:1: sparse: sparse: unused label
 'err_conn_init'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git kbingham/drm-misc/next/sn65dsi86/hpd
head:   69c67e7d89e9e68e6ffb17deec7112af1d529ac9
commit: 89cc7f4771cdaa89ba193c12722fd330b4d5d34c [9/21] squash: drm/bridge: ti-sn65dsi86: Add NO_CONNECTOR support
config: arm64-randconfig-s031-20220627
compiler: aarch64-linux-gcc (GCC) 11.3.0
reproduce:
         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
         chmod +x ~/bin/make.cross
         # apt-get install sparse
         # sparse version: v0.6.4-31-g4880bd19-dirty
         # https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git/commit/?id=89cc7f4771cdaa89ba193c12722fd330b4d5d34c
         git remote add kbingham-rcar https://git.kernel.org/pub/scm/linux/kernel/git/kbingham/rcar.git
         git fetch --no-tags kbingham-rcar kbingham/drm-misc/next/sn65dsi86/hpd
         git checkout 89cc7f4771cdaa89ba193c12722fd330b4d5d34c
         # save the config file
         mkdir build_dir && cp config build_dir/.config
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/drm/bridge/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <yujie.liu@...el.com>


sparse warnings: (new ones prefixed by >>)
 >> drivers/gpu/drm/bridge/ti-sn65dsi86.c:736:1: sparse: sparse: unused label 'err_conn_init'

vim +/err_conn_init +736 drivers/gpu/drm/bridge/ti-sn65dsi86.c

c3b75d4734cb82 Maxime Ripard    2021-10-25  695
c3b75d4734cb82 Maxime Ripard    2021-10-25  696  static int ti_sn_bridge_attach(struct drm_bridge *bridge,
c3b75d4734cb82 Maxime Ripard    2021-10-25  697  			       enum drm_bridge_attach_flags flags)
c3b75d4734cb82 Maxime Ripard    2021-10-25  698  {
c3b75d4734cb82 Maxime Ripard    2021-10-25  699  	struct ti_sn65dsi86 *pdata = bridge_to_ti_sn65dsi86(bridge);
c3b75d4734cb82 Maxime Ripard    2021-10-25  700  	int ret;
c3b75d4734cb82 Maxime Ripard    2021-10-25  701
c3b75d4734cb82 Maxime Ripard    2021-10-25  702  	pdata->aux.drm_dev = bridge->dev;
c3b75d4734cb82 Maxime Ripard    2021-10-25  703  	ret = drm_dp_aux_register(&pdata->aux);
c3b75d4734cb82 Maxime Ripard    2021-10-25  704  	if (ret < 0) {
c3b75d4734cb82 Maxime Ripard    2021-10-25  705  		drm_err(bridge->dev, "Failed to register DP AUX channel: %d\n", ret);
c3b75d4734cb82 Maxime Ripard    2021-10-25  706  		return ret;
c3b75d4734cb82 Maxime Ripard    2021-10-25  707  	}
c3b75d4734cb82 Maxime Ripard    2021-10-25  708
89cc7f4771cdaa Kieran Bingham   2022-03-09  709  	/*
89cc7f4771cdaa Kieran Bingham   2022-03-09  710  	 * Attach the next bridge We never want the next bridge to *also* create
89cc7f4771cdaa Kieran Bingham   2022-03-09  711  	 * a connector:
89cc7f4771cdaa Kieran Bingham   2022-03-09  712  	 */
4e5763f03e105f Laurent Pinchart 2021-06-24  713  	ret = drm_bridge_attach(bridge->encoder, pdata->next_bridge,
89cc7f4771cdaa Kieran Bingham   2022-03-09  714  				&pdata->bridge,
89cc7f4771cdaa Kieran Bingham   2022-03-09  715  				flags | DRM_BRIDGE_ATTACH_NO_CONNECTOR);
4e5763f03e105f Laurent Pinchart 2021-06-24  716  	if (ret < 0)
e283820cbf8092 Douglas Anderson 2022-02-04  717  		goto err_initted_aux;
e283820cbf8092 Douglas Anderson 2022-02-04  718
89cc7f4771cdaa Kieran Bingham   2022-03-09  719  	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
89cc7f4771cdaa Kieran Bingham   2022-03-09  720  		return 0;
89cc7f4771cdaa Kieran Bingham   2022-03-09  721
e283820cbf8092 Douglas Anderson 2022-02-04  722  	pdata->connector = drm_bridge_connector_init(pdata->bridge.dev,
e283820cbf8092 Douglas Anderson 2022-02-04  723  						     pdata->bridge.encoder);
e283820cbf8092 Douglas Anderson 2022-02-04  724  	if (IS_ERR(pdata->connector)) {
e283820cbf8092 Douglas Anderson 2022-02-04  725  		ret = PTR_ERR(pdata->connector);
e283820cbf8092 Douglas Anderson 2022-02-04  726  		goto err_initted_aux;
e283820cbf8092 Douglas Anderson 2022-02-04  727  	}
e283820cbf8092 Douglas Anderson 2022-02-04  728
e283820cbf8092 Douglas Anderson 2022-02-04  729  	drm_connector_attach_encoder(pdata->connector, pdata->bridge.encoder);
4e5763f03e105f Laurent Pinchart 2021-06-24  730
a095f15c00e278 Sandeep Panda    2018-07-20  731  	return 0;
a095f15c00e278 Sandeep Panda    2018-07-20  732
e283820cbf8092 Douglas Anderson 2022-02-04  733  err_initted_aux:
b7f228f9db56bd Rob Clark        2022-02-06  734  	if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
89cc7f4771cdaa Kieran Bingham   2022-03-09  735  		drm_connector_cleanup(pdata->connector);
b7f228f9db56bd Rob Clark        2022-02-06 @736  err_conn_init:
61712618753032 Lyude Paul       2021-02-19  737  	drm_dp_aux_unregister(&pdata->aux);
a095f15c00e278 Sandeep Panda    2018-07-20  738  	return ret;
a095f15c00e278 Sandeep Panda    2018-07-20  739  }
a095f15c00e278 Sandeep Panda    2018-07-20  740

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