drivers/gpu/drm/verisilicon/vs_bridge.c:325:9-16: WARNING: ERR_CAST can be used with bridge

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
commit: dbf21777caa8b8c88c12f7f036b01208fec0d55a drm: verisilicon: add a driver for Verisilicon display controllers
date:   9 months ago
config: loongarch-randconfig-r2111-20261102 (https://download.01.org/0day-ci/archive/20261102/202611021314.XBaxacvs-lkp@xxxxxxxxx/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 3e5b45eed6c3ec25f4f1cc81ce0be10106a8f31f)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: dbf21777caa8 ("drm: verisilicon: add a driver for Verisilicon display controllers")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202611021314.XBaxacvs-lkp@xxxxxxxxx/

cocci warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/verisilicon/vs_bridge.c:325:9-16: WARNING: ERR_CAST can be used with bridge
--
>> drivers/gpu/drm/verisilicon/vs_crtc.c:175:9-16: WARNING: ERR_CAST can be used with primary

vim +325 drivers/gpu/drm/verisilicon/vs_bridge.c

   288	
   289	struct vs_bridge *vs_bridge_init(struct drm_device *drm_dev,
   290					 struct vs_crtc *crtc)
   291	{
   292		unsigned int output = crtc->id;
   293		struct vs_bridge *bridge;
   294		struct drm_bridge *next;
   295		enum vs_bridge_output_interface intf;
   296		const struct drm_bridge_funcs *bridge_funcs;
   297		int ret, enctype;
   298	
   299		intf = vs_bridge_detect_output_interface(drm_dev->dev->of_node,
   300							 output);
   301		if (intf == -ENODEV) {
   302			drm_dbg(drm_dev, "Skipping output %u\n", output);
   303			return NULL;
   304		}
   305	
   306		next = devm_drm_of_get_bridge(drm_dev->dev, drm_dev->dev->of_node,
   307					      output, intf);
   308		if (IS_ERR(next)) {
   309			ret = PTR_ERR(next);
   310			if (ret != -EPROBE_DEFER)
   311				drm_err(drm_dev,
   312					"Cannot get downstream bridge of output %u\n",
   313					output);
   314			return ERR_PTR(ret);
   315		}
   316	
   317		if (intf == VSDC_OUTPUT_INTERFACE_DPI)
   318			bridge_funcs = &vs_dpi_bridge_funcs;
   319		else
   320			bridge_funcs = &vs_dp_bridge_funcs;
   321	
   322		bridge = devm_drm_bridge_alloc(drm_dev->dev, struct vs_bridge, base,
   323					       bridge_funcs);
   324		if (IS_ERR(bridge))
 > 325			return ERR_PTR(PTR_ERR(bridge));

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