Hi Noralf, First bad commit (maybe != root cause): tree: git://git.kernel.org/pub/scm/linux/kernel/git/lkundrak/linux-mmp.git lr/gud2 head: 84d9081acc7185e369834b2b0808d197d7a79d2c commit: 84d9081acc7185e369834b2b0808d197d7a79d2c [7/7] usb: gadget: function: Add Generic USB Display support config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 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 git checkout 84d9081acc7185e369834b2b0808d197d7a79d2c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/gud/gud_drm_gadget.c: In function 'gud_drm_gadget_check': 330 | ret = drm_client_modeset_check(&gdg->client); | ^~~~~~~~~~~~~~~~~~~~~~~~ | drm_client_modeset_set In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from include/linux/list.h:9, from include/linux/lockdep.h:43, from include/linux/spinlock_types.h:18, from arch/powerpc/include/asm/lppaca.h:45, from arch/powerpc/include/asm/paca.h:17, from arch/powerpc/include/asm/current.h:13, from include/linux/sched.h:12, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/backlight.h:12, from drivers/gpu/drm/gud/gud_drm_gadget.c:6: drivers/gpu/drm/gud/gud_drm_gadget.c: In function 'gud_drm_gadget_write_buffer': include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 4 has type 'u32' {aka 'unsigned int'} [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH' 11 | #define KERN_ERR KERN_SOH "3" /* error conditions */ | ^~~~~~~~ include/linux/printk.h:338:9: note: in expansion of macro 'KERN_ERR' 338 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/gpu/drm/gud/gud_drm_gadget.c:424:4: note: in expansion of macro 'pr_err' 424 | pr_err("%s: Buffer compressed len differs: %zu != %zu\n", | ^~~~~~ drivers/gpu/drm/gud/gud_drm_gadget.c:424:56: note: format string is defined here 424 | pr_err("%s: Buffer compressed len differs: %zu != %zu\n", | ~~^ | | | long unsigned int | %u In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from include/linux/list.h:9, from include/linux/lockdep.h:43, from include/linux/spinlock_types.h:18, from arch/powerpc/include/asm/lppaca.h:45, from arch/powerpc/include/asm/paca.h:17, from arch/powerpc/include/asm/current.h:13, from include/linux/sched.h:12, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/backlight.h:12, from drivers/gpu/drm/gud/gud_drm_gadget.c:6: include/linux/kern_levels.h:5:18: warning: format '%zu' expects argument of type 'size_t', but argument 4 has type 'u32' {aka 'unsigned int'} [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH' 11 | #define KERN_ERR KERN_SOH "3" /* error conditions */ | ^~~~~~~~ include/linux/printk.h:338:9: note: in expansion of macro 'KERN_ERR' 338 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/gpu/drm/gud/gud_drm_gadget.c:440:3: note: in expansion of macro 'pr_err' 440 | pr_err("%s: Buffer len differs: %zu != %zu\n", | ^~~~~~ drivers/gpu/drm/gud/gud_drm_gadget.c:440:44: note: format string is defined here 440 | pr_err("%s: Buffer len differs: %zu != %zu\n", | ~~^ | | | long unsigned int | %u 457 | return drm_client_framebuffer_flush(buffer, rect); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ | drm_client_framebuffer_delete drivers/gpu/drm/gud/gud_drm_gadget.c: In function 'gud_drm_gadget_client_unregister': 1044 | vfree(gdg->work_buf); | ^~~~~ | kvfree drivers/gpu/drm/gud/gud_drm_gadget.c: In function 'gud_drm_gadget_init': 1123 | gdg->work_buf = vmalloc(gdg->max_buffer_size); | ^~~~~~~ | kvmalloc drivers/gpu/drm/gud/gud_drm_gadget.c:1123:16: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 1123 | gdg->work_buf = vmalloc(gdg->max_buffer_size); | ^ cc1: some warnings being treated as errors vim +330 drivers/gpu/drm/gud/gud_drm_gadget.c 9e2361b992206e Noralf Trønnes 2020-05-29 244 9e2361b992206e Noralf Trønnes 2020-05-29 245 static int gud_drm_gadget_check(struct gud_drm_gadget *gdg, struct gud_drm_req_set_state *req, 9e2361b992206e Noralf Trønnes 2020-05-29 246 size_t size) 9e2361b992206e Noralf Trønnes 2020-05-29 247 { 9e2361b992206e Noralf Trønnes 2020-05-29 248 struct drm_client_dev *client = &gdg->client; 9e2361b992206e Noralf Trønnes 2020-05-29 249 u32 format = le32_to_cpu(req->format); 9e2361b992206e Noralf Trønnes 2020-05-29 250 struct drm_client_buffer *buffer; 9e2361b992206e Noralf Trønnes 2020-05-29 251 struct drm_connector *connector; 9e2361b992206e Noralf Trønnes 2020-05-29 252 struct drm_display_mode mode; 9e2361b992206e Noralf Trønnes 2020-05-29 253 unsigned int i; 9e2361b992206e Noralf Trønnes 2020-05-29 254 void *vaddr; 9e2361b992206e Noralf Trønnes 2020-05-29 255 int ret; 9e2361b992206e Noralf Trønnes 2020-05-29 256 9e2361b992206e Noralf Trønnes 2020-05-29 257 if (size < sizeof(struct gud_drm_req_set_state)) 9e2361b992206e Noralf Trønnes 2020-05-29 258 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 259 9e2361b992206e Noralf Trønnes 2020-05-29 260 if (size != struct_size(req, properties, req->num_properties)) 9e2361b992206e Noralf Trønnes 2020-05-29 261 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 262 9e2361b992206e Noralf Trønnes 2020-05-29 263 memset(&mode, 0, sizeof(mode)); 9e2361b992206e Noralf Trønnes 2020-05-29 264 gud_drm_to_display_mode(&mode, &req->mode); 9e2361b992206e Noralf Trønnes 2020-05-29 265 9e2361b992206e Noralf Trønnes 2020-05-29 266 gdg->check_ok = false; 9e2361b992206e Noralf Trønnes 2020-05-29 267 9e2361b992206e Noralf Trønnes 2020-05-29 268 if (!mode.hdisplay || !format) 9e2361b992206e Noralf Trønnes 2020-05-29 269 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 270 9e2361b992206e Noralf Trønnes 2020-05-29 271 if (req->connector >= gdg->connector_count) 9e2361b992206e Noralf Trønnes 2020-05-29 272 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 273 9e2361b992206e Noralf Trønnes 2020-05-29 274 connector = gdg->connectors[req->connector].connector; 9e2361b992206e Noralf Trønnes 2020-05-29 275 9e2361b992206e Noralf Trønnes 2020-05-29 276 if (gdg->buffer_check) { 9e2361b992206e Noralf Trønnes 2020-05-29 277 drm_client_framebuffer_delete(gdg->buffer_check); 9e2361b992206e Noralf Trønnes 2020-05-29 278 gdg->buffer_check = NULL; 9e2361b992206e Noralf Trønnes 2020-05-29 279 } 9e2361b992206e Noralf Trønnes 2020-05-29 280 9e2361b992206e Noralf Trønnes 2020-05-29 281 if (!gud_drm_gadget_check_buffer(gdg, gdg->buffer, &mode, format)) { 9e2361b992206e Noralf Trønnes 2020-05-29 282 buffer = drm_client_framebuffer_create(client, mode.hdisplay, mode.vdisplay, 9e2361b992206e Noralf Trønnes 2020-05-29 283 format); 9e2361b992206e Noralf Trønnes 2020-05-29 284 if (IS_ERR(buffer)) 9e2361b992206e Noralf Trønnes 2020-05-29 285 return PTR_ERR(buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 286 9e2361b992206e Noralf Trønnes 2020-05-29 287 vaddr = drm_client_buffer_vmap(buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 288 if (IS_ERR(vaddr)) { 9e2361b992206e Noralf Trønnes 2020-05-29 289 drm_client_framebuffer_delete(buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 290 return PTR_ERR(vaddr); 9e2361b992206e Noralf Trønnes 2020-05-29 291 } 9e2361b992206e Noralf Trønnes 2020-05-29 292 9e2361b992206e Noralf Trønnes 2020-05-29 293 gdg->buffer_check = buffer; 9e2361b992206e Noralf Trønnes 2020-05-29 294 } else { 9e2361b992206e Noralf Trønnes 2020-05-29 295 buffer = gdg->buffer; 9e2361b992206e Noralf Trønnes 2020-05-29 296 } 9e2361b992206e Noralf Trønnes 2020-05-29 297 9e2361b992206e Noralf Trønnes 2020-05-29 298 ret = drm_client_modeset_set(client, connector, &mode, buffer->fb); 9e2361b992206e Noralf Trønnes 2020-05-29 299 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 300 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 301 9e2361b992206e Noralf Trønnes 2020-05-29 302 for (i = 0; i < req->num_properties; i++) { 9e2361b992206e Noralf Trønnes 2020-05-29 303 u16 prop = le16_to_cpu(req->properties[i].prop); 9e2361b992206e Noralf Trønnes 2020-05-29 304 u64 val = le64_to_cpu(req->properties[i].val); 9e2361b992206e Noralf Trønnes 2020-05-29 305 9e2361b992206e Noralf Trønnes 2020-05-29 306 if (gud_drm_gadget_set_connector_property(client, connector, prop, val, &ret)) { 9e2361b992206e Noralf Trønnes 2020-05-29 307 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 308 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 309 continue; 9e2361b992206e Noralf Trønnes 2020-05-29 310 } 9e2361b992206e Noralf Trønnes 2020-05-29 311 9e2361b992206e Noralf Trønnes 2020-05-29 312 switch (prop) { 9e2361b992206e Noralf Trønnes 2020-05-29 313 case GUD_DRM_PROPERTY_BACKLIGHT_BRIGHTNESS: 9e2361b992206e Noralf Trønnes 2020-05-29 314 if (val > 100) 9e2361b992206e Noralf Trønnes 2020-05-29 315 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 316 gdg->brightness = val; 9e2361b992206e Noralf Trønnes 2020-05-29 317 break; 9e2361b992206e Noralf Trønnes 2020-05-29 318 case GUD_DRM_PROPERTY_ROTATION: 9e2361b992206e Noralf Trønnes 2020-05-29 319 ret = drm_client_modeset_set_rotation(client, val); 9e2361b992206e Noralf Trønnes 2020-05-29 320 break; 9e2361b992206e Noralf Trønnes 2020-05-29 321 default: 9e2361b992206e Noralf Trønnes 2020-05-29 322 pr_err("%s: Unknown property: %u\n", __func__, prop); 9e2361b992206e Noralf Trønnes 2020-05-29 323 continue; 9e2361b992206e Noralf Trønnes 2020-05-29 324 } 9e2361b992206e Noralf Trønnes 2020-05-29 325 9e2361b992206e Noralf Trønnes 2020-05-29 326 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 327 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 328 } 9e2361b992206e Noralf Trønnes 2020-05-29 329 9e2361b992206e Noralf Trønnes 2020-05-29 @330 ret = drm_client_modeset_check(&gdg->client); 9e2361b992206e Noralf Trønnes 2020-05-29 331 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 332 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 333 9e2361b992206e Noralf Trønnes 2020-05-29 334 gdg->check_ok = true; 9e2361b992206e Noralf Trønnes 2020-05-29 335 9e2361b992206e Noralf Trønnes 2020-05-29 336 return 0; 9e2361b992206e Noralf Trønnes 2020-05-29 337 } 9e2361b992206e Noralf Trønnes 2020-05-29 338 9e2361b992206e Noralf Trønnes 2020-05-29 339 static int gud_drm_gadget_commit(struct gud_drm_gadget *gdg) 9e2361b992206e Noralf Trønnes 2020-05-29 340 { 9e2361b992206e Noralf Trønnes 2020-05-29 341 int ret; 9e2361b992206e Noralf Trønnes 2020-05-29 342 9e2361b992206e Noralf Trønnes 2020-05-29 343 if (!gdg->check_ok) 9e2361b992206e Noralf Trønnes 2020-05-29 344 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 345 9e2361b992206e Noralf Trønnes 2020-05-29 346 if (gdg->backlight) { 9e2361b992206e Noralf Trønnes 2020-05-29 347 int val, max_brightness = gdg->backlight->props.max_brightness; 9e2361b992206e Noralf Trønnes 2020-05-29 348 9e2361b992206e Noralf Trønnes 2020-05-29 349 val = DIV64_U64_ROUND_UP(gdg->brightness * max_brightness, 100); 9e2361b992206e Noralf Trønnes 2020-05-29 350 ret = backlight_device_set_brightness(gdg->backlight, val); 9e2361b992206e Noralf Trønnes 2020-05-29 351 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 352 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 353 } 9e2361b992206e Noralf Trønnes 2020-05-29 354 9e2361b992206e Noralf Trønnes 2020-05-29 355 ret = drm_client_modeset_commit(&gdg->client); 9e2361b992206e Noralf Trønnes 2020-05-29 356 if (ret) 9e2361b992206e Noralf Trønnes 2020-05-29 357 return ret; 9e2361b992206e Noralf Trønnes 2020-05-29 358 9e2361b992206e Noralf Trønnes 2020-05-29 359 if (gdg->buffer_check) { 9e2361b992206e Noralf Trønnes 2020-05-29 360 drm_client_framebuffer_delete(gdg->buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 361 gdg->buffer = gdg->buffer_check; 9e2361b992206e Noralf Trønnes 2020-05-29 362 gdg->buffer_check = NULL; 9e2361b992206e Noralf Trønnes 2020-05-29 363 } 9e2361b992206e Noralf Trønnes 2020-05-29 364 9e2361b992206e Noralf Trønnes 2020-05-29 365 return 0; 9e2361b992206e Noralf Trønnes 2020-05-29 366 } 9e2361b992206e Noralf Trønnes 2020-05-29 367 9e2361b992206e Noralf Trønnes 2020-05-29 368 static size_t gud_drm_gadget_write_buffer_memcpy(struct drm_client_buffer *buffer, 9e2361b992206e Noralf Trønnes 2020-05-29 369 const void *src, size_t len, 9e2361b992206e Noralf Trønnes 2020-05-29 370 struct drm_rect *rect) 9e2361b992206e Noralf Trønnes 2020-05-29 371 { 9e2361b992206e Noralf Trønnes 2020-05-29 372 unsigned int cpp = buffer->fb->format->cpp[0]; 9e2361b992206e Noralf Trønnes 2020-05-29 373 size_t dst_pitch = buffer->fb->pitches[0]; 9e2361b992206e Noralf Trønnes 2020-05-29 374 size_t src_pitch = drm_rect_width(rect) * cpp; 9e2361b992206e Noralf Trønnes 2020-05-29 375 unsigned int y; 9e2361b992206e Noralf Trønnes 2020-05-29 376 void *dst; 9e2361b992206e Noralf Trønnes 2020-05-29 377 9e2361b992206e Noralf Trønnes 2020-05-29 378 /* Get the address, it's already mapped */ 9e2361b992206e Noralf Trønnes 2020-05-29 379 dst = drm_client_buffer_vmap(buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 380 dst += rect->y1 * dst_pitch; 9e2361b992206e Noralf Trønnes 2020-05-29 381 dst += rect->x1 * cpp; 9e2361b992206e Noralf Trønnes 2020-05-29 382 9e2361b992206e Noralf Trønnes 2020-05-29 383 for (y = 0; y < drm_rect_height(rect) && len; y++) { 9e2361b992206e Noralf Trønnes 2020-05-29 384 src_pitch = min(src_pitch, len); 9e2361b992206e Noralf Trønnes 2020-05-29 385 memcpy(dst, src, src_pitch); 9e2361b992206e Noralf Trønnes 2020-05-29 386 src += src_pitch; 9e2361b992206e Noralf Trønnes 2020-05-29 387 dst += dst_pitch; 9e2361b992206e Noralf Trønnes 2020-05-29 388 len -= src_pitch; 9e2361b992206e Noralf Trønnes 2020-05-29 389 } 9e2361b992206e Noralf Trønnes 2020-05-29 390 9e2361b992206e Noralf Trønnes 2020-05-29 391 return len; 9e2361b992206e Noralf Trønnes 2020-05-29 392 } 9e2361b992206e Noralf Trønnes 2020-05-29 393 9e2361b992206e Noralf Trønnes 2020-05-29 394 static bool gud_drm_gadget_check_rect(struct drm_client_buffer *buffer, struct drm_rect *rect) 9e2361b992206e Noralf Trønnes 2020-05-29 395 { 9e2361b992206e Noralf Trønnes 2020-05-29 396 return buffer->fb && rect->x1 < rect->x2 && rect->y1 < rect->y2 && 9e2361b992206e Noralf Trønnes 2020-05-29 397 rect->x2 <= buffer->fb->width && rect->y2 <= buffer->fb->height; 9e2361b992206e Noralf Trønnes 2020-05-29 398 } 9e2361b992206e Noralf Trønnes 2020-05-29 399 9e2361b992206e Noralf Trønnes 2020-05-29 400 int gud_drm_gadget_write_buffer(struct gud_drm_gadget *gdg, const void *buf, size_t len) 9e2361b992206e Noralf Trønnes 2020-05-29 401 { 9e2361b992206e Noralf Trønnes 2020-05-29 402 struct drm_client_buffer *buffer = gdg->buffer ? gdg->buffer : gdg->buffer_check; 9e2361b992206e Noralf Trønnes 2020-05-29 403 struct drm_rect *rect = &gdg->set_buffer_rect; 9e2361b992206e Noralf Trønnes 2020-05-29 404 u8 compression = gdg->set_buffer_compression; 9e2361b992206e Noralf Trønnes 2020-05-29 405 struct drm_framebuffer *fb; 9e2361b992206e Noralf Trønnes 2020-05-29 406 size_t remain; 9e2361b992206e Noralf Trønnes 2020-05-29 407 int ret; 9e2361b992206e Noralf Trønnes 2020-05-29 408 9e2361b992206e Noralf Trønnes 2020-05-29 409 pr_debug("%s: len=%zu compression=0x%x\n", __func__, len, compression); 9e2361b992206e Noralf Trønnes 2020-05-29 410 9e2361b992206e Noralf Trønnes 2020-05-29 411 if (WARN_ON_ONCE(!buffer)) 9e2361b992206e Noralf Trønnes 2020-05-29 412 return -ENOMEM; 9e2361b992206e Noralf Trønnes 2020-05-29 413 9e2361b992206e Noralf Trønnes 2020-05-29 414 if (!gud_drm_gadget_check_rect(buffer, rect)) { 9e2361b992206e Noralf Trønnes 2020-05-29 415 pr_err("%s: Rectangle doesn't fit: " DRM_RECT_FMT "\n", 9e2361b992206e Noralf Trønnes 2020-05-29 416 __func__, DRM_RECT_ARG(rect)); 9e2361b992206e Noralf Trønnes 2020-05-29 417 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 418 } 9e2361b992206e Noralf Trønnes 2020-05-29 419 9e2361b992206e Noralf Trønnes 2020-05-29 420 fb = buffer->fb; 9e2361b992206e Noralf Trønnes 2020-05-29 421 9e2361b992206e Noralf Trønnes 2020-05-29 422 if (compression & GUD_DRM_COMPRESSION_LZ4) { 9e2361b992206e Noralf Trønnes 2020-05-29 423 if (len != gdg->set_buffer_compressed_length) { 9e2361b992206e Noralf Trønnes 2020-05-29 424 pr_err("%s: Buffer compressed len differs: %zu != %zu\n", 9e2361b992206e Noralf Trønnes 2020-05-29 425 __func__, len, gdg->set_buffer_compressed_length); 9e2361b992206e Noralf Trønnes 2020-05-29 426 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 427 } 9e2361b992206e Noralf Trønnes 2020-05-29 428 9e2361b992206e Noralf Trønnes 2020-05-29 429 ret = LZ4_decompress_safe(buf, gdg->work_buf, len, gdg->max_buffer_size); 9e2361b992206e Noralf Trønnes 2020-05-29 430 if (ret < 0) { 9e2361b992206e Noralf Trønnes 2020-05-29 431 pr_err("%s: Failed to decompress buffer\n", __func__); 9e2361b992206e Noralf Trønnes 2020-05-29 432 return -EIO; 9e2361b992206e Noralf Trønnes 2020-05-29 433 } 9e2361b992206e Noralf Trønnes 2020-05-29 434 9e2361b992206e Noralf Trønnes 2020-05-29 435 buf = gdg->work_buf; 9e2361b992206e Noralf Trønnes 2020-05-29 436 len = ret; 9e2361b992206e Noralf Trønnes 2020-05-29 437 } 9e2361b992206e Noralf Trønnes 2020-05-29 438 9e2361b992206e Noralf Trønnes 2020-05-29 439 if (len != gdg->set_buffer_length) { 9e2361b992206e Noralf Trønnes 2020-05-29 440 pr_err("%s: Buffer len differs: %zu != %zu\n", 9e2361b992206e Noralf Trønnes 2020-05-29 441 __func__, len, gdg->set_buffer_length); 9e2361b992206e Noralf Trønnes 2020-05-29 442 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 443 } 9e2361b992206e Noralf Trønnes 2020-05-29 444 9e2361b992206e Noralf Trønnes 2020-05-29 445 if (len > (drm_rect_width(rect) * drm_rect_height(rect) * fb->format->cpp[0])) { 9e2361b992206e Noralf Trønnes 2020-05-29 446 pr_err("%s: Buffer is too big for rectangle: " DRM_RECT_FMT " len=%zu\n", 9e2361b992206e Noralf Trønnes 2020-05-29 447 __func__, DRM_RECT_ARG(rect), len); 9e2361b992206e Noralf Trønnes 2020-05-29 448 return -EINVAL; 9e2361b992206e Noralf Trønnes 2020-05-29 449 } 9e2361b992206e Noralf Trønnes 2020-05-29 450 9e2361b992206e Noralf Trønnes 2020-05-29 451 remain = gud_drm_gadget_write_buffer_memcpy(buffer, buf, len, rect); 9e2361b992206e Noralf Trønnes 2020-05-29 452 if (remain) { 9e2361b992206e Noralf Trønnes 2020-05-29 453 pr_err("%s: Failed to write buffer: remain=%zu\n", __func__, remain); 9e2361b992206e Noralf Trønnes 2020-05-29 454 return -EIO; 9e2361b992206e Noralf Trønnes 2020-05-29 455 } 9e2361b992206e Noralf Trønnes 2020-05-29 456 9e2361b992206e Noralf Trønnes 2020-05-29 @457 return drm_client_framebuffer_flush(buffer, rect); 9e2361b992206e Noralf Trønnes 2020-05-29 458 } 9e2361b992206e Noralf Trønnes 2020-05-29 459 EXPORT_SYMBOL(gud_drm_gadget_write_buffer); 9e2361b992206e Noralf Trønnes 2020-05-29 460 :::::: The code at line 330 was first introduced by commit :::::: 9e2361b992206e76551d08195854205ba3a2b002 drm/gud: Add functionality for the USB gadget side :::::: TO: Noralf Trønnes <noralf(a)tronnes.org&gt; :::::: CC: Lubomir Rintel <lkundrak(a)v3.sk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org