tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f55966571d5eb2876a11e48e798b4592fa1ffbb7 commit: bfa8f78e06ed0b495a5736380de0e7f833a5efbe thunderbolt: Add KUnit tests for credit allocation date: 5 weeks ago config: arm64-randconfig-r015-20210709 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout bfa8f78e06ed0b495a5736380de0e7f833a5efbe # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): static void tb_test_credit_alloc_all(struct kunit *test) ^ 1 warning generated. vim +/tb_test_credit_alloc_all +2209 drivers/thunderbolt/test.c 2208 2210 { 2211 struct tb_port *up, *down, *in, *out, *nhi, *port; 2212 struct tb_tunnel *pcie_tunnel, *dp_tunnel1, *dp_tunnel2, *usb3_tunnel; 2213 struct tb_tunnel *dma_tunnel1, *dma_tunnel2; 2214 struct tb_switch *host, *dev; 2215 struct tb_path *path; 2216 2217 /* 2218 * Create PCIe, 2 x DP, USB 3.x and two DMA tunnels from host to 2219 * device. Expectation is that all these can be established with 2220 * the default credit allocation found in Intel hardware. 2221 */ 2222 2223 host = alloc_host_usb4(test); 2224 dev = alloc_dev_usb4(test, host, 0x1, true); 2225 2226 down = &host->ports[8]; 2227 up = &dev->ports[9]; 2228 pcie_tunnel = tb_tunnel_alloc_pci(NULL, up, down); 2229 KUNIT_ASSERT_TRUE(test, pcie_tunnel != NULL); 2230 KUNIT_ASSERT_EQ(test, pcie_tunnel->npaths, (size_t)2); 2231 2232 path = pcie_tunnel->paths[0]; 2233 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2234 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2235 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U); 2236 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2237 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U); 2238 2239 path = pcie_tunnel->paths[1]; 2240 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2241 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2242 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U); 2243 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2244 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 64U); 2245 2246 in = &host->ports[5]; 2247 out = &dev->ports[13]; 2248 2249 dp_tunnel1 = tb_tunnel_alloc_dp(NULL, in, out, 0, 0); 2250 KUNIT_ASSERT_TRUE(test, dp_tunnel1 != NULL); 2251 KUNIT_ASSERT_EQ(test, dp_tunnel1->npaths, (size_t)3); 2252 2253 path = dp_tunnel1->paths[0]; 2254 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2255 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 12U); 2256 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U); 2257 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 18U); 2258 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 0U); 2259 2260 path = dp_tunnel1->paths[1]; 2261 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2262 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2263 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U); 2264 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2265 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2266 2267 path = dp_tunnel1->paths[2]; 2268 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2269 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2270 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U); 2271 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2272 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2273 2274 in = &host->ports[6]; 2275 out = &dev->ports[14]; 2276 2277 dp_tunnel2 = tb_tunnel_alloc_dp(NULL, in, out, 0, 0); 2278 KUNIT_ASSERT_TRUE(test, dp_tunnel2 != NULL); 2279 KUNIT_ASSERT_EQ(test, dp_tunnel2->npaths, (size_t)3); 2280 2281 path = dp_tunnel2->paths[0]; 2282 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2283 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 12U); 2284 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U); 2285 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 18U); 2286 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 0U); 2287 2288 path = dp_tunnel2->paths[1]; 2289 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2290 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2291 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U); 2292 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2293 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2294 2295 path = dp_tunnel2->paths[2]; 2296 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2297 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2298 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 1U); 2299 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2300 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2301 2302 down = &host->ports[12]; 2303 up = &dev->ports[16]; 2304 usb3_tunnel = tb_tunnel_alloc_usb3(NULL, up, down, 0, 0); 2305 KUNIT_ASSERT_TRUE(test, usb3_tunnel != NULL); 2306 KUNIT_ASSERT_EQ(test, usb3_tunnel->npaths, (size_t)2); 2307 2308 path = usb3_tunnel->paths[0]; 2309 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2310 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2311 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U); 2312 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2313 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U); 2314 2315 path = usb3_tunnel->paths[1]; 2316 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2317 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2318 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 7U); 2319 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2320 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 32U); 2321 2322 nhi = &host->ports[7]; 2323 port = &dev->ports[3]; 2324 2325 dma_tunnel1 = tb_tunnel_alloc_dma(NULL, nhi, port, 8, 1, 8, 1); 2326 KUNIT_ASSERT_TRUE(test, dma_tunnel1 != NULL); 2327 KUNIT_ASSERT_EQ(test, dma_tunnel1->npaths, (size_t)2); 2328 2329 path = dma_tunnel1->paths[0]; 2330 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2331 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2332 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U); 2333 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2334 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U); 2335 2336 path = dma_tunnel1->paths[1]; 2337 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2338 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2339 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U); 2340 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2341 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 14U); 2342 2343 dma_tunnel2 = tb_tunnel_alloc_dma(NULL, nhi, port, 9, 2, 9, 2); 2344 KUNIT_ASSERT_TRUE(test, dma_tunnel2 != NULL); 2345 KUNIT_ASSERT_EQ(test, dma_tunnel2->npaths, (size_t)2); 2346 2347 path = dma_tunnel2->paths[0]; 2348 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2349 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2350 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 14U); 2351 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2352 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2353 2354 path = dma_tunnel2->paths[1]; 2355 KUNIT_ASSERT_EQ(test, path->path_length, 2); 2356 KUNIT_EXPECT_EQ(test, path->hops[0].nfc_credits, 0U); 2357 KUNIT_EXPECT_EQ(test, path->hops[0].initial_credits, 0U); 2358 KUNIT_EXPECT_EQ(test, path->hops[1].nfc_credits, 0U); 2359 KUNIT_EXPECT_EQ(test, path->hops[1].initial_credits, 1U); 2360 2361 tb_tunnel_free(dma_tunnel2); 2362 tb_tunnel_free(dma_tunnel1); 2363 tb_tunnel_free(usb3_tunnel); 2364 tb_tunnel_free(dp_tunnel2); 2365 tb_tunnel_free(dp_tunnel1); 2366 tb_tunnel_free(pcie_tunnel); 2367 } 2368 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org