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* drivers/gpu/drm/rockchip/rockchip_rgb.c:153:2: warning: Value stored to 'connector' is never read [clang-analyzer-deadcode.DeadStores]
@ 2021-12-08 19:18 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-12-08 19:18 UTC (permalink / raw)
  To: kbuild

[-- Attachment #1: Type: text/plain, Size: 23155 bytes --]

CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Alex Bee <knaerzche@gmail.com>
CC: Heiko Stuebner <heiko@sntech.de>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2a987e65025e2b79c6d453b78cb5985ac6e5eb26
commit: 2e87bf389e1396b9f1360e1a7cdc27f423f56463 drm/rockchip: add DRM_BRIDGE_ATTACH_NO_CONNECTOR flag to drm_bridge_attach
date:   3 months ago
:::::: branch date: 20 hours ago
:::::: commit date: 3 months ago
config: riscv-randconfig-c006-20211206 (https://download.01.org/0day-ci/archive/20211209/202112090339.fDIla36M-lkp(a)intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f50be8eb0a12a61d23db6cda452c693001d76898)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e87bf389e1396b9f1360e1a7cdc27f423f56463
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 2e87bf389e1396b9f1360e1a7cdc27f423f56463
        # save the config file to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


clang-analyzer warnings: (new ones prefixed by >>)
   drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:154:2: note: Calling 'nvkm_rdaux'
           nvkm_rdaux(dp->aux, DPCD_LC02, &sink_tp, 1);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h:171:6: note: Assuming 'ret' is not equal to 0
           if (ret == 0) {
               ^~~~~~~~
   drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h:171:2: note: Taking false branch
           if (ret == 0) {
           ^
   drivers/gpu/drm/nouveau/include/nvkm/subdev/i2c.h:176:2: note: Returning without writing to '*data'
           return ret;
           ^
   drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:154:2: note: Returning from 'nvkm_rdaux'
           nvkm_rdaux(dp->aux, DPCD_LC02, &sink_tp, 1);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c:155:10: note: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage
           sink_tp &= ~DPCD_LC02_TRAINING_PATTERN_SET;
           ~~~~~~~ ^
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   15 warnings generated.
   drivers/gpu/drm/radeon/cik.c:2088:4: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2088:4: note: Value stored to 'err' is never read
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2111:4: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2111:4: note: Value stored to 'err' is never read
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2134:4: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2134:4: note: Value stored to 'err' is never read
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2172:4: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2172:4: note: Value stored to 'err' is never read
                           err = -EINVAL;
                           ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2225:5: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores]
                                   err = -EINVAL;
                                   ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:2225:5: note: Value stored to 'err' is never read
                                   err = -EINVAL;
                                   ^     ~~~~~~~
   drivers/gpu/drm/radeon/cik.c:3170:6: warning: Value stored to 'gb_addr_config' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           u32 gb_addr_config = RREG32(GB_ADDR_CONFIG);
               ^~~~~~~~~~~~~~
   drivers/gpu/drm/radeon/cik.c:3170:6: note: Value stored to 'gb_addr_config' during its initialization is never read
           u32 gb_addr_config = RREG32(GB_ADDR_CONFIG);
               ^~~~~~~~~~~~~~
   drivers/gpu/drm/radeon/cik.c:5019:3: warning: Value stored to 'tmp' is never read [clang-analyzer-deadcode.DeadStores]
                   tmp = RREG32(GRBM_SOFT_RESET);
                   ^
   drivers/gpu/drm/radeon/cik.c:5019:3: note: Value stored to 'tmp' is never read
   drivers/gpu/drm/radeon/cik.c:5033:3: warning: Value stored to 'tmp' is never read [clang-analyzer-deadcode.DeadStores]
                   tmp = RREG32(SRBM_SOFT_RESET);
                   ^
   drivers/gpu/drm/radeon/cik.c:5033:3: note: Value stored to 'tmp' is never read
   drivers/gpu/drm/radeon/cik.c:6208:3: warning: Value stored to 'data' is never read [clang-analyzer-deadcode.DeadStores]
                   data = RREG32_UVD_CTX(UVD_CGC_MEM_CTRL);
                   ^
   drivers/gpu/drm/radeon/cik.c:6208:3: note: Value stored to 'data' is never read
   drivers/gpu/drm/radeon/cik.c:6520:3: warning: Value stored to 'data' is never read [clang-analyzer-deadcode.DeadStores]
                   data = RREG32(DB_RENDER_CONTROL);
                   ^
   drivers/gpu/drm/radeon/cik.c:6520:3: note: Value stored to 'data' is never read
   drivers/gpu/drm/radeon/cik.c:7933:4: warning: Value stored to 'queue_id' is never read [clang-analyzer-deadcode.DeadStores]
                           queue_id = (ring_id & 0x7) >> 0;
                           ^          ~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/radeon/cik.c:7933:4: note: Value stored to 'queue_id' is never read
                           queue_id = (ring_id & 0x7) >> 0;
                           ^          ~~~~~~~~~~~~~~~~~~~~
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   5 warnings generated.
   drivers/gpu/drm/rockchip/cdn-dp-reg.c:685:2: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
           ret = cdn_dp_reg_write(dp, DP_VC_TABLE(15), val);
           ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/rockchip/cdn-dp-reg.c:685:2: note: Value stored to 'ret' is never read
           ret = cdn_dp_reg_write(dp, DP_VC_TABLE(15), val);
           ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   5 warnings generated.
>> drivers/gpu/drm/rockchip/rockchip_rgb.c:153:2: warning: Value stored to 'connector' is never read [clang-analyzer-deadcode.DeadStores]
           connector = &rgb->connector;
           ^           ~~~~~~~~~~~~~~~
   drivers/gpu/drm/rockchip/rockchip_rgb.c:153:2: note: Value stored to 'connector' is never read
           connector = &rgb->connector;
           ^           ~~~~~~~~~~~~~~~
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   Suppressed 4 warnings (4 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   5 warnings generated.
   drivers/gpu/drm/qxl/qxl_kms.c:163:24: warning: Array subscript is undefined [clang-analyzer-core.uninitialized.ArraySubscript]
                    (unsigned long long)pci_resource_end(pdev, sb),
                                        ^
   include/drm/drm_print.h:510:31: note: expanded from macro 'DRM_DEBUG_KMS'
           __drm_dbg(DRM_UT_KMS, fmt, ##__VA_ARGS__)
                                        ^~~~~~~~~~~
   include/linux/pci.h:1929:37: note: expanded from macro 'pci_resource_end'
   #define pci_resource_end(dev, bar)      ((dev)->resource[(bar)].end)
                                            ^               ~~~~~
   drivers/gpu/drm/qxl/qxl_kms.c:112:9: note: 'sb' declared without an initial value
           int r, sb;
                  ^~
   drivers/gpu/drm/qxl/qxl_kms.c:116:2: note: Loop condition is false.  Exiting loop
           mutex_init(&qdev->gem.mutex);
           ^
   include/linux/mutex.h:101:32: note: expanded from macro 'mutex_init'
   #define mutex_init(mutex)                                               \
                                                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:117:2: note: Loop condition is false.  Exiting loop
           mutex_init(&qdev->update_area_mutex);
           ^
   include/linux/mutex.h:101:32: note: expanded from macro 'mutex_init'
   #define mutex_init(mutex)                                               \
                                                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:118:2: note: Loop condition is false.  Exiting loop
           mutex_init(&qdev->release_mutex);
           ^
   include/linux/mutex.h:101:32: note: expanded from macro 'mutex_init'
   #define mutex_init(mutex)                                               \
                                                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:119:2: note: Loop condition is false.  Exiting loop
           mutex_init(&qdev->surf_evict_mutex);
           ^
   include/linux/mutex.h:101:32: note: expanded from macro 'mutex_init'
   #define mutex_init(mutex)                                               \
                                                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:123:19: note: Assuming field 'end' is equal to 0
           qdev->rom_size = pci_resource_len(pdev, 2);
                            ^
   include/linux/pci.h:1932:4: note: expanded from macro 'pci_resource_len'
           ((pci_resource_end((dev), (bar)) == 0) ? 0 :    \
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/pci.h:1929:36: note: expanded from macro 'pci_resource_end'
   #define pci_resource_end(dev, bar)      ((dev)->resource[(bar)].end)
                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:123:19: note: '?' condition is true
           qdev->rom_size = pci_resource_len(pdev, 2);
                            ^
   include/linux/pci.h:1932:3: note: expanded from macro 'pci_resource_len'
           ((pci_resource_end((dev), (bar)) == 0) ? 0 :    \
            ^
   drivers/gpu/drm/qxl/qxl_kms.c:127:61: note: Assuming field 'end' is equal to 0
           qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
                                                                      ^
   include/linux/pci.h:1932:4: note: expanded from macro 'pci_resource_len'
           ((pci_resource_end((dev), (bar)) == 0) ? 0 :    \
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/pci.h:1929:36: note: expanded from macro 'pci_resource_end'
   #define pci_resource_end(dev, bar)      ((dev)->resource[(bar)].end)
                                           ^
   drivers/gpu/drm/qxl/qxl_kms.c:127:61: note: '?' condition is true
           qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
                                                                      ^
   include/linux/pci.h:1932:3: note: expanded from macro 'pci_resource_len'
           ((pci_resource_end((dev), (bar)) == 0) ? 0 :    \
            ^
   drivers/gpu/drm/qxl/qxl_kms.c:127:23: note: Calling 'io_mapping_create_wc'
           qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/io-mapping.h:203:10: note: Calling 'kmalloc'
           iomap = kmalloc(sizeof(*iomap), GFP_KERNEL);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/slab.h:579:2: note: Taking false branch
           if (__builtin_constant_p(size)) {
           ^
   include/linux/slab.h:596:2: note: Returning pointer, which participates in a condition later
           return __kmalloc(size, flags);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/io-mapping.h:203:10: note: Returning from 'kmalloc'
           iomap = kmalloc(sizeof(*iomap), GFP_KERNEL);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/io-mapping.h:204:6: note: Assuming 'iomap' is non-null, which participates in a condition later
           if (!iomap)
               ^~~~~~
   include/linux/io-mapping.h:204:2: note: Taking false branch
           if (!iomap)
           ^
   include/linux/io-mapping.h:207:7: note: Calling 'io_mapping_init_wc'
           if (!io_mapping_init_wc(iomap, base, size)) {

vim +/connector +153 drivers/gpu/drm/rockchip/rockchip_rgb.c

1f0f01515172787 Sandy Huang       2018-08-30   73  
1f0f01515172787 Sandy Huang       2018-08-30   74  struct rockchip_rgb *rockchip_rgb_init(struct device *dev,
1f0f01515172787 Sandy Huang       2018-08-30   75  				       struct drm_crtc *crtc,
1f0f01515172787 Sandy Huang       2018-08-30   76  				       struct drm_device *drm_dev)
1f0f01515172787 Sandy Huang       2018-08-30   77  {
1f0f01515172787 Sandy Huang       2018-08-30   78  	struct rockchip_rgb *rgb;
1f0f01515172787 Sandy Huang       2018-08-30   79  	struct drm_encoder *encoder;
1f0f01515172787 Sandy Huang       2018-08-30   80  	struct device_node *port, *endpoint;
1f0f01515172787 Sandy Huang       2018-08-30   81  	u32 endpoint_id;
1f0f01515172787 Sandy Huang       2018-08-30   82  	int ret = 0, child_count = 0;
1f0f01515172787 Sandy Huang       2018-08-30   83  	struct drm_panel *panel;
1f0f01515172787 Sandy Huang       2018-08-30   84  	struct drm_bridge *bridge;
2e87bf389e1396b Alex Bee          2021-09-13   85  	struct drm_connector *connector;
1f0f01515172787 Sandy Huang       2018-08-30   86  
1f0f01515172787 Sandy Huang       2018-08-30   87  	rgb = devm_kzalloc(dev, sizeof(*rgb), GFP_KERNEL);
1f0f01515172787 Sandy Huang       2018-08-30   88  	if (!rgb)
1f0f01515172787 Sandy Huang       2018-08-30   89  		return ERR_PTR(-ENOMEM);
1f0f01515172787 Sandy Huang       2018-08-30   90  
1f0f01515172787 Sandy Huang       2018-08-30   91  	rgb->dev = dev;
1f0f01515172787 Sandy Huang       2018-08-30   92  	rgb->drm_dev = drm_dev;
1f0f01515172787 Sandy Huang       2018-08-30   93  
1f0f01515172787 Sandy Huang       2018-08-30   94  	port = of_graph_get_port_by_id(dev->of_node, 0);
1f0f01515172787 Sandy Huang       2018-08-30   95  	if (!port)
1f0f01515172787 Sandy Huang       2018-08-30   96  		return ERR_PTR(-EINVAL);
1f0f01515172787 Sandy Huang       2018-08-30   97  
1f0f01515172787 Sandy Huang       2018-08-30   98  	for_each_child_of_node(port, endpoint) {
1f0f01515172787 Sandy Huang       2018-08-30   99  		if (of_property_read_u32(endpoint, "reg", &endpoint_id))
1f0f01515172787 Sandy Huang       2018-08-30  100  			endpoint_id = 0;
1f0f01515172787 Sandy Huang       2018-08-30  101  
7cd7943dc55e0f7 Heiko Stuebner    2020-01-21  102  		/* if subdriver (> 0) or error case (< 0), ignore entry */
7cd7943dc55e0f7 Heiko Stuebner    2020-01-21  103  		if (rockchip_drm_endpoint_is_subdriver(endpoint) != 0)
1f0f01515172787 Sandy Huang       2018-08-30  104  			continue;
1f0f01515172787 Sandy Huang       2018-08-30  105  
1f0f01515172787 Sandy Huang       2018-08-30  106  		child_count++;
1f0f01515172787 Sandy Huang       2018-08-30  107  		ret = drm_of_find_panel_or_bridge(dev->of_node, 0, endpoint_id,
1f0f01515172787 Sandy Huang       2018-08-30  108  						  &panel, &bridge);
a17ce9960b3628b Julia Lawall      2019-01-13  109  		if (!ret) {
a17ce9960b3628b Julia Lawall      2019-01-13  110  			of_node_put(endpoint);
1f0f01515172787 Sandy Huang       2018-08-30  111  			break;
1f0f01515172787 Sandy Huang       2018-08-30  112  		}
a17ce9960b3628b Julia Lawall      2019-01-13  113  	}
1f0f01515172787 Sandy Huang       2018-08-30  114  
1f0f01515172787 Sandy Huang       2018-08-30  115  	of_node_put(port);
1f0f01515172787 Sandy Huang       2018-08-30  116  
1f0f01515172787 Sandy Huang       2018-08-30  117  	/* if the rgb output is not connected to anything, just return */
1f0f01515172787 Sandy Huang       2018-08-30  118  	if (!child_count)
1f0f01515172787 Sandy Huang       2018-08-30  119  		return NULL;
1f0f01515172787 Sandy Huang       2018-08-30  120  
1f0f01515172787 Sandy Huang       2018-08-30  121  	if (ret < 0) {
1f0f01515172787 Sandy Huang       2018-08-30  122  		if (ret != -EPROBE_DEFER)
1f0f01515172787 Sandy Huang       2018-08-30  123  			DRM_DEV_ERROR(dev, "failed to find panel or bridge %d\n", ret);
1f0f01515172787 Sandy Huang       2018-08-30  124  		return ERR_PTR(ret);
1f0f01515172787 Sandy Huang       2018-08-30  125  	}
1f0f01515172787 Sandy Huang       2018-08-30  126  
1f0f01515172787 Sandy Huang       2018-08-30  127  	encoder = &rgb->encoder;
1f0f01515172787 Sandy Huang       2018-08-30  128  	encoder->possible_crtcs = drm_crtc_mask(crtc);
1f0f01515172787 Sandy Huang       2018-08-30  129  
0dbd735448bfdb0 Thomas Zimmermann 2020-03-05  130  	ret = drm_simple_encoder_init(drm_dev, encoder, DRM_MODE_ENCODER_NONE);
1f0f01515172787 Sandy Huang       2018-08-30  131  	if (ret < 0) {
1f0f01515172787 Sandy Huang       2018-08-30  132  		DRM_DEV_ERROR(drm_dev->dev,
1f0f01515172787 Sandy Huang       2018-08-30  133  			      "failed to initialize encoder: %d\n", ret);
1f0f01515172787 Sandy Huang       2018-08-30  134  		return ERR_PTR(ret);
1f0f01515172787 Sandy Huang       2018-08-30  135  	}
1f0f01515172787 Sandy Huang       2018-08-30  136  
1f0f01515172787 Sandy Huang       2018-08-30  137  	drm_encoder_helper_add(encoder, &rockchip_rgb_encoder_helper_funcs);
1f0f01515172787 Sandy Huang       2018-08-30  138  
1f0f01515172787 Sandy Huang       2018-08-30  139  	if (panel) {
89958b7cd9555a5 Laurent Pinchart  2019-09-04  140  		bridge = drm_panel_bridge_add_typed(panel,
89958b7cd9555a5 Laurent Pinchart  2019-09-04  141  						    DRM_MODE_CONNECTOR_LVDS);
1f0f01515172787 Sandy Huang       2018-08-30  142  		if (IS_ERR(bridge))
1f0f01515172787 Sandy Huang       2018-08-30  143  			return ERR_CAST(bridge);
1f0f01515172787 Sandy Huang       2018-08-30  144  	}
1f0f01515172787 Sandy Huang       2018-08-30  145  
1f0f01515172787 Sandy Huang       2018-08-30  146  	rgb->bridge = bridge;
1f0f01515172787 Sandy Huang       2018-08-30  147  
2e87bf389e1396b Alex Bee          2021-09-13  148  	ret = drm_bridge_attach(encoder, rgb->bridge, NULL,
2e87bf389e1396b Alex Bee          2021-09-13  149  				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
fb8d617f8fd64f5 Laurent Pinchart  2021-03-23  150  	if (ret)
1f0f01515172787 Sandy Huang       2018-08-30  151  		goto err_free_encoder;
1f0f01515172787 Sandy Huang       2018-08-30  152  
2e87bf389e1396b Alex Bee          2021-09-13 @153  	connector = &rgb->connector;
2e87bf389e1396b Alex Bee          2021-09-13  154  	connector = drm_bridge_connector_init(rgb->drm_dev, encoder);
2e87bf389e1396b Alex Bee          2021-09-13  155  	if (IS_ERR(connector)) {
2e87bf389e1396b Alex Bee          2021-09-13  156  		DRM_DEV_ERROR(drm_dev->dev,
2e87bf389e1396b Alex Bee          2021-09-13  157  			      "failed to initialize bridge connector: %pe\n",
2e87bf389e1396b Alex Bee          2021-09-13  158  			      connector);
2e87bf389e1396b Alex Bee          2021-09-13  159  		ret = PTR_ERR(connector);
2e87bf389e1396b Alex Bee          2021-09-13  160  		goto err_free_encoder;
2e87bf389e1396b Alex Bee          2021-09-13  161  	}
2e87bf389e1396b Alex Bee          2021-09-13  162  
2e87bf389e1396b Alex Bee          2021-09-13  163  	ret = drm_connector_attach_encoder(connector, encoder);
2e87bf389e1396b Alex Bee          2021-09-13  164  	if (ret < 0) {
2e87bf389e1396b Alex Bee          2021-09-13  165  		DRM_DEV_ERROR(drm_dev->dev,
2e87bf389e1396b Alex Bee          2021-09-13  166  			      "failed to attach encoder: %d\n", ret);
2e87bf389e1396b Alex Bee          2021-09-13  167  		goto err_free_connector;
2e87bf389e1396b Alex Bee          2021-09-13  168  	}
2e87bf389e1396b Alex Bee          2021-09-13  169  
1f0f01515172787 Sandy Huang       2018-08-30  170  	return rgb;
1f0f01515172787 Sandy Huang       2018-08-30  171  
2e87bf389e1396b Alex Bee          2021-09-13  172  err_free_connector:
2e87bf389e1396b Alex Bee          2021-09-13  173  	drm_connector_cleanup(connector);
1f0f01515172787 Sandy Huang       2018-08-30  174  err_free_encoder:
1f0f01515172787 Sandy Huang       2018-08-30  175  	drm_encoder_cleanup(encoder);
1f0f01515172787 Sandy Huang       2018-08-30  176  	return ERR_PTR(ret);
1f0f01515172787 Sandy Huang       2018-08-30  177  }
1f0f01515172787 Sandy Huang       2018-08-30  178  EXPORT_SYMBOL_GPL(rockchip_rgb_init);
1f0f01515172787 Sandy Huang       2018-08-30  179  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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2021-12-08 19:18 drivers/gpu/drm/rockchip/rockchip_rgb.c:153:2: warning: Value stored to 'connector' is never read [clang-analyzer-deadcode.DeadStores] kernel test robot

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