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Message-ID: <202109022256.lajpBpjt-lkp@intel.com>
Date: Thu, 2 Sep 2021 22:27:02 +0800
From: kernel test robot <lkp@...el.com>
To: Pawel Laszczak <pawell@...ence.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, Peter Chen <peter.chen@....com>
Subject: drivers/usb/cdns3/cdnsp-debug.h:185:6: warning: variable 'ret' set
but not used
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 4ac6d90867a4de2e12117e755dbd76e08d88697f
commit: 118b2a3237cf499727649b1c018dd2f1d329af08 usb: cdnsp: Add tracepoints for CDNSP driver
date: 8 months ago
config: i386-randconfig-a016-20210902 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c9948e9254fbb6ea00f66c7b4542311d21e060be)
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=118b2a3237cf499727649b1c018dd2f1d329af08
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 118b2a3237cf499727649b1c018dd2f1d329af08
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/usb/cdns3/cdnsp-ring.c:64:
In file included from drivers/usb/cdns3/cdnsp-trace.h:27:
>> drivers/usb/cdns3/cdnsp-debug.h:185:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret = 0;
^
1 warning generated.
--
In file included from drivers/usb/cdns3/cdnsp-gadget.c:26:
In file included from drivers/usb/cdns3/cdnsp-trace.h:27:
>> drivers/usb/cdns3/cdnsp-debug.h:185:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret = 0;
^
drivers/usb/cdns3/cdnsp-gadget.c:1236:6: warning: variable 'temp_64' set but not used [-Wunused-but-set-variable]
u64 temp_64;
^
2 warnings generated.
vim +/ret +185 drivers/usb/cdns3/cdnsp-debug.h
178
179 static inline const char *cdnsp_decode_trb(char *str, size_t size, u32 field0,
180 u32 field1, u32 field2, u32 field3)
181 {
182 int ep_id = TRB_TO_EP_INDEX(field3) - 1;
183 int type = TRB_FIELD_TO_TYPE(field3);
184 unsigned int ep_num;
> 185 int ret = 0;
186 u32 temp;
187
188 ep_num = DIV_ROUND_UP(ep_id, 2);
189
190 switch (type) {
191 case TRB_LINK:
192 ret += snprintf(str, size,
193 "LINK %08x%08x intr %ld type '%s' flags %c:%c:%c:%c",
194 field1, field0, GET_INTR_TARGET(field2),
195 cdnsp_trb_type_string(type),
196 field3 & TRB_IOC ? 'I' : 'i',
197 field3 & TRB_CHAIN ? 'C' : 'c',
198 field3 & TRB_TC ? 'T' : 't',
199 field3 & TRB_CYCLE ? 'C' : 'c');
200 break;
201 case TRB_TRANSFER:
202 case TRB_COMPLETION:
203 case TRB_PORT_STATUS:
204 case TRB_HC_EVENT:
205 ret += snprintf(str, size,
206 "ep%d%s(%d) type '%s' TRB %08x%08x status '%s'"
207 " len %ld slot %ld flags %c:%c",
208 ep_num, ep_id % 2 ? "out" : "in",
209 TRB_TO_EP_INDEX(field3),
210 cdnsp_trb_type_string(type), field1, field0,
211 cdnsp_trb_comp_code_string(GET_COMP_CODE(field2)),
212 EVENT_TRB_LEN(field2), TRB_TO_SLOT_ID(field3),
213 field3 & EVENT_DATA ? 'E' : 'e',
214 field3 & TRB_CYCLE ? 'C' : 'c');
215 break;
216 case TRB_MFINDEX_WRAP:
217 ret += snprintf(str, size, "%s: flags %c",
218 cdnsp_trb_type_string(type),
219 field3 & TRB_CYCLE ? 'C' : 'c');
220 break;
221 case TRB_SETUP:
222 ret += snprintf(str, size,
223 "type '%s' bRequestType %02x bRequest %02x "
224 "wValue %02x%02x wIndex %02x%02x wLength %d "
225 "length %ld TD size %ld intr %ld Setup ID %ld "
226 "flags %c:%c:%c",
227 cdnsp_trb_type_string(type),
228 field0 & 0xff,
229 (field0 & 0xff00) >> 8,
230 (field0 & 0xff000000) >> 24,
231 (field0 & 0xff0000) >> 16,
232 (field1 & 0xff00) >> 8,
233 field1 & 0xff,
234 (field1 & 0xff000000) >> 16 |
235 (field1 & 0xff0000) >> 16,
236 TRB_LEN(field2), GET_TD_SIZE(field2),
237 GET_INTR_TARGET(field2),
238 TRB_SETUPID_TO_TYPE(field3),
239 field3 & TRB_IDT ? 'D' : 'd',
240 field3 & TRB_IOC ? 'I' : 'i',
241 field3 & TRB_CYCLE ? 'C' : 'c');
242 break;
243 case TRB_DATA:
244 ret += snprintf(str, size,
245 "type '%s' Buffer %08x%08x length %ld TD size %ld "
246 "intr %ld flags %c:%c:%c:%c:%c:%c:%c",
247 cdnsp_trb_type_string(type),
248 field1, field0, TRB_LEN(field2),
249 GET_TD_SIZE(field2),
250 GET_INTR_TARGET(field2),
251 field3 & TRB_IDT ? 'D' : 'i',
252 field3 & TRB_IOC ? 'I' : 'i',
253 field3 & TRB_CHAIN ? 'C' : 'c',
254 field3 & TRB_NO_SNOOP ? 'S' : 's',
255 field3 & TRB_ISP ? 'I' : 'i',
256 field3 & TRB_ENT ? 'E' : 'e',
257 field3 & TRB_CYCLE ? 'C' : 'c');
258 break;
259 case TRB_STATUS:
260 ret += snprintf(str, size,
261 "Buffer %08x%08x length %ld TD size %ld intr"
262 "%ld type '%s' flags %c:%c:%c:%c",
263 field1, field0, TRB_LEN(field2),
264 GET_TD_SIZE(field2),
265 GET_INTR_TARGET(field2),
266 cdnsp_trb_type_string(type),
267 field3 & TRB_IOC ? 'I' : 'i',
268 field3 & TRB_CHAIN ? 'C' : 'c',
269 field3 & TRB_ENT ? 'E' : 'e',
270 field3 & TRB_CYCLE ? 'C' : 'c');
271 break;
272 case TRB_NORMAL:
273 case TRB_ISOC:
274 case TRB_EVENT_DATA:
275 case TRB_TR_NOOP:
276 ret += snprintf(str, size,
277 "type '%s' Buffer %08x%08x length %ld "
278 "TD size %ld intr %ld "
279 "flags %c:%c:%c:%c:%c:%c:%c:%c:%c",
280 cdnsp_trb_type_string(type),
281 field1, field0, TRB_LEN(field2),
282 GET_TD_SIZE(field2),
283 GET_INTR_TARGET(field2),
284 field3 & TRB_BEI ? 'B' : 'b',
285 field3 & TRB_IDT ? 'T' : 't',
286 field3 & TRB_IOC ? 'I' : 'i',
287 field3 & TRB_CHAIN ? 'C' : 'c',
288 field3 & TRB_NO_SNOOP ? 'S' : 's',
289 field3 & TRB_ISP ? 'I' : 'i',
290 field3 & TRB_ENT ? 'E' : 'e',
291 field3 & TRB_CYCLE ? 'C' : 'c',
292 !(field3 & TRB_EVENT_INVALIDATE) ? 'V' : 'v');
293 break;
294 case TRB_CMD_NOOP:
295 case TRB_ENABLE_SLOT:
296 ret += snprintf(str, size, "%s: flags %c",
297 cdnsp_trb_type_string(type),
298 field3 & TRB_CYCLE ? 'C' : 'c');
299 break;
300 case TRB_DISABLE_SLOT:
301 ret += snprintf(str, size, "%s: slot %ld flags %c",
302 cdnsp_trb_type_string(type),
303 TRB_TO_SLOT_ID(field3),
304 field3 & TRB_CYCLE ? 'C' : 'c');
305 break;
306 case TRB_ADDR_DEV:
307 ret += snprintf(str, size,
308 "%s: ctx %08x%08x slot %ld flags %c:%c",
309 cdnsp_trb_type_string(type), field1, field0,
310 TRB_TO_SLOT_ID(field3),
311 field3 & TRB_BSR ? 'B' : 'b',
312 field3 & TRB_CYCLE ? 'C' : 'c');
313 break;
314 case TRB_CONFIG_EP:
315 ret += snprintf(str, size,
316 "%s: ctx %08x%08x slot %ld flags %c:%c",
317 cdnsp_trb_type_string(type), field1, field0,
318 TRB_TO_SLOT_ID(field3),
319 field3 & TRB_DC ? 'D' : 'd',
320 field3 & TRB_CYCLE ? 'C' : 'c');
321 break;
322 case TRB_EVAL_CONTEXT:
323 ret += snprintf(str, size,
324 "%s: ctx %08x%08x slot %ld flags %c",
325 cdnsp_trb_type_string(type), field1, field0,
326 TRB_TO_SLOT_ID(field3),
327 field3 & TRB_CYCLE ? 'C' : 'c');
328 break;
329 case TRB_RESET_EP:
330 case TRB_HALT_ENDPOINT:
331 case TRB_FLUSH_ENDPOINT:
332 ret += snprintf(str, size,
333 "%s: ep%d%s(%d) ctx %08x%08x slot %ld flags %c",
334 cdnsp_trb_type_string(type),
335 ep_num, ep_id % 2 ? "out" : "in",
336 TRB_TO_EP_INDEX(field3), field1, field0,
337 TRB_TO_SLOT_ID(field3),
338 field3 & TRB_CYCLE ? 'C' : 'c');
339 break;
340 case TRB_STOP_RING:
341 ret += snprintf(str, size,
342 "%s: ep%d%s(%d) slot %ld sp %d flags %c",
343 cdnsp_trb_type_string(type),
344 ep_num, ep_id % 2 ? "out" : "in",
345 TRB_TO_EP_INDEX(field3),
346 TRB_TO_SLOT_ID(field3),
347 TRB_TO_SUSPEND_PORT(field3),
348 field3 & TRB_CYCLE ? 'C' : 'c');
349 break;
350 case TRB_SET_DEQ:
351 ret += snprintf(str, size,
352 "%s: ep%d%s(%d) deq %08x%08x stream %ld slot %ld flags %c",
353 cdnsp_trb_type_string(type),
354 ep_num, ep_id % 2 ? "out" : "in",
355 TRB_TO_EP_INDEX(field3), field1, field0,
356 TRB_TO_STREAM_ID(field2),
357 TRB_TO_SLOT_ID(field3),
358 field3 & TRB_CYCLE ? 'C' : 'c');
359 break;
360 case TRB_RESET_DEV:
361 ret += snprintf(str, size, "%s: slot %ld flags %c",
362 cdnsp_trb_type_string(type),
363 TRB_TO_SLOT_ID(field3),
364 field3 & TRB_CYCLE ? 'C' : 'c');
365 break;
366 case TRB_ENDPOINT_NRDY:
367 temp = TRB_TO_HOST_STREAM(field2);
368
369 ret += snprintf(str, size,
370 "%s: ep%d%s(%d) H_SID %x%s%s D_SID %lx flags %c:%c",
371 cdnsp_trb_type_string(type),
372 ep_num, ep_id % 2 ? "out" : "in",
373 TRB_TO_EP_INDEX(field3), temp,
374 temp == STREAM_PRIME_ACK ? "(PRIME)" : "",
375 temp == STREAM_REJECTED ? "(REJECTED)" : "",
376 TRB_TO_DEV_STREAM(field0),
377 field3 & TRB_STAT ? 'S' : 's',
378 field3 & TRB_CYCLE ? 'C' : 'c');
379 break;
380 default:
381 ret += snprintf(str, size,
382 "type '%s' -> raw %08x %08x %08x %08x",
383 cdnsp_trb_type_string(type),
384 field0, field1, field2, field3);
385 }
386
387 return str;
388 }
389
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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