drivers/thunderbolt/test.c:2209:13: warning: stack frame size (10528) exceeds limit (8192) in function 'tb_test_credit_alloc_all'

From: kernel test robot
Date: Fri Jul 09 2021 - 14:45:11 EST

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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/?id=bfa8f78e06ed0b495a5736380de0e7f833a5efbe
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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/thunderbolt/test.c:2209:13: warning: stack frame size (10528) exceeds limit (8192) in function 'tb_test_credit_alloc_all' [-Wframe-larger-than]
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
> 2209 static void tb_test_credit_alloc_all(struct kunit *test)
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@xxxxxxxxxxxx

Attachment: .config.gz
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Next message: trix: "[RFC PATCH v10 0/3] standard release after compat_id change"
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