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charset=us-ascii tree: https://gitlab.com/stefandoesinger/zx297520-kernel dlink head: 7998b6e929bb20ed66acafa33720d8e3533e1598 commit: fcc80da512bd8aa06a383a655eaf0bed6df90b43 [69/142] more mbox stuff stuff config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20261009/202610090126.utqNiMAt-lkp@intel.com/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261009/202610090126.utqNiMAt-lkp@intel.com/reproduce) 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 | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202610090126.utqNiMAt-lkp@intel.com/ All warnings (new ones prefixed by >>): drivers/rpmsg/zx29_smd.c:178:13: warning: variable 'ptr' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] 178 | } else if (!send_pos) { | ^~~~~~~~~ drivers/rpmsg/zx29_smd.c:193:37: note: uninitialized use occurs here 193 | zx29_smd->ept.cb(&zx29_smd->rpdev, ptr, len, zx29_smd->ept.priv, RPMSG_ADDR_ANY); | ^~~ drivers/rpmsg/zx29_smd.c:178:9: note: remove the 'if' if its condition is always true 178 | } else if (!send_pos) { | ^~~~~~~~~~~~~~ 179 | dev_info(&zx29_smd->pdev->dev, "send_pos == 0\n"); 180 | ptr = zx29_smd->data_r + zx29_smd->recv->recv_pos; 181 | len = zx29_smd->recv->size - zx29_smd->recv->recv_pos; 182 | } else { | ~~~~~~ 183 | dev_info(&zx29_smd->pdev->dev, "wraparound\n"); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 184 | len = zx29_smd->recv->size - zx29_smd->recv->recv_pos + send_pos; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 185 | alloc = kzalloc(len, GFP_KERNEL); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 186 | 187 | memcpy(alloc, zx29_smd->data_r + zx29_smd->recv->recv_pos, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 188 | zx29_smd->recv->size - zx29_smd->recv->recv_pos); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 189 | memcpy(alloc + zx29_smd->recv->size - zx29_smd->recv->recv_pos, zx29_smd->data_r, | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 190 | send_pos); | ~~~~~~~~~~ 191 | } | ~ drivers/rpmsg/zx29_smd.c:155:9: note: initialize the variable 'ptr' to silence this warning 155 | u8 *ptr, *alloc = NULL; | ^ | = NULL >> drivers/rpmsg/zx29_smd.c:239:52: warning: cast to smaller integer type 'unsigned int' from 'u8 *' (aka 'unsigned char *') [-Wpointer-to-int-cast] 239 | dev_info(&pdev->dev, "zx29_smd->data_r 0x%08x\n", (unsigned int)zx29_smd->data_r); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:160:67: note: expanded from macro 'dev_info' 160 | dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~ include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ drivers/rpmsg/zx29_smd.c:262:52: warning: cast to smaller integer type 'unsigned int' from 'u8 *' (aka 'unsigned char *') [-Wpointer-to-int-cast] 262 | dev_info(&pdev->dev, "zx29_smd->data_s 0x%08x\n", (unsigned int)zx29_smd->data_s); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:160:67: note: expanded from macro 'dev_info' 160 | dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~ include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ drivers/rpmsg/zx29_smd.c:146:13: warning: unused function 'zx29_smd_release_device' [-Wunused-function] 146 | static void zx29_smd_release_device(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~~~~ 4 warnings generated. vim +239 drivers/rpmsg/zx29_smd.c 203 204 static int zx29_smd_probe(struct platform_device *pdev) 205 { 206 struct device *dev = &pdev->dev; 207 struct zx29_smd *zx29_smd; 208 struct device_node *sram; 209 struct resource res; 210 u32 channel; 211 int ret; 212 213 ret = of_property_read_u32(pdev->dev.of_node, "zte,rpmsg-channel", &channel); 214 if (ret) { 215 dev_err(&pdev->dev, "Invalid rpmsg channel entry\n"); 216 return ret; 217 } 218 219 zx29_smd = devm_kzalloc(dev, sizeof(*zx29_smd), GFP_KERNEL); 220 if (!zx29_smd) 221 return -ENOMEM; 222 zx29_smd->pdev = pdev; 223 dev_info(&pdev->dev, "Hello rpmsg\n"); 224 225 sram = of_parse_phandle(pdev->dev.of_node, "sram", 0); 226 if (!sram) { 227 dev_info(dev, "no sram\n"); 228 return -EINVAL; 229 } 230 of_address_to_resource(sram, 0, &res); 231 zx29_smd->recv = devm_memremap(dev, res.start + channel * sizeof(struct zx29_channel_hdr), 232 sizeof(struct zx29_channel_hdr), MEMREMAP_WB); 233 234 if (!(zx29_smd->recv->flags & 1)) { 235 dev_info(&pdev->dev, "Receive channel not created by remote end\n"); 236 return -ENODEV; 237 } 238 zx29_smd->data_r = devm_memremap(dev, zx29_smd->recv->base, zx29_smd->recv->size, MEMREMAP_WB); > 239 dev_info(&pdev->dev, "zx29_smd->data_r 0x%08x\n", (unsigned int)zx29_smd->data_r); 240 241 zx29_smd->rpdev.ops = &zx29_smd_device_ops; 242 zx29_smd->rpdev.src = channel; 243 zx29_smd->rpdev.dst = channel; 244 zx29_smd->rpdev.announce = true; 245 strscpy(zx29_smd->rpdev.id.name, "rpmsg-tty", RPMSG_NAME_SIZE); 246 zx29_smd->rpdev.dev.parent = &pdev->dev; 247 248 sram = of_parse_phandle(pdev->dev.of_node, "sram", 1); 249 if (!sram) 250 return -EINVAL; 251 of_address_to_resource(sram, 0, &res); 252 zx29_smd->send = devm_memremap(dev, res.start + channel * sizeof(struct zx29_channel_hdr), 253 sizeof(struct zx29_channel_hdr), MEMREMAP_WB); 254 255 /* FIXME: Create channel infrastructure. */ 256 zx29_smd->send->base = 0x82000000; 257 zx29_smd->send->recv_pos = zx29_smd->send->send_pos = 0; 258 zx29_smd->send->size = 0x20; 259 zx29_smd->send->flags = 1; 260 zx29_smd->send->end = 0; 261 zx29_smd->data_s = devm_memremap(dev, zx29_smd->send->base, zx29_smd->send->size, MEMREMAP_WB); 262 dev_info(&pdev->dev, "zx29_smd->data_s 0x%08x\n", (unsigned int)zx29_smd->data_s); 263 264 zx29_smd->mbox_client.dev = &pdev->dev; 265 zx29_smd->mbox_client.rx_callback = zx29_smd_rx_callback; 266 zx29_smd->mbox_client.tx_block = true; 267 zx29_smd->mbox_client.tx_tout = 500; 268 zx29_smd->mbox_client.tx_done = txdone; 269 zx29_smd->mbox_client.knows_txdone = false; 270 271 return rpmsg_register_device(&zx29_smd->rpdev); 272 } 273 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki