tree: git://git.infradead.org/users/hch/misc.git follow_pfn head: 66855f59863300731d08162e8d20d951b0827e28 commit: ba9792af6d1881f3e5fffbdd8b2308d854217878 [1/3] media: videobuf2: remove userptr support config: x86_64-randconfig-a005-20210713 (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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc follow_pfn git checkout ba9792af6d1881f3e5fffbdd8b2308d854217878 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): out: ^~~~ drivers/media/common/videobuf2/videobuf2-dma-contig.c:468:15: warning: unused variable 'i' [-Wunused-variable] int n_pages, i; ^ 2 warnings generated. vim +/out +539 drivers/media/common/videobuf2/videobuf2-dma-contig.c e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 461 36c0f8b32c4bd4 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-04-15 462 static void *vb2_dc_get_userptr(struct device *dev, unsigned long vaddr, cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 463 unsigned long size, enum dma_data_direction dma_dir) 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 464 { 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 465 struct vb2_dc_buf *buf; fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 466 struct frame_vector *vec; c4860ad6056483 drivers/media/v4l2-core/videobuf2-dma-contig.c Tvrtko Ursulin 2017-07-31 467 unsigned int offset; fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 468 int n_pages, i; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 469 int ret = 0; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 470 struct sg_table *sgt; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 471 unsigned long contig_size; d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 472 unsigned long dma_align = dma_get_cache_alignment(); d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 473 d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 474 /* Only cache aligned DMA transfers are reliable */ d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 475 if (!IS_ALIGNED(vaddr | size, dma_align)) { d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 476 pr_debug("user data must be aligned to %lu bytes\n", dma_align); d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 477 return ERR_PTR(-EINVAL); d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 478 } d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 479 d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 480 if (!size) { d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 481 pr_debug("size is zero\n"); d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 482 return ERR_PTR(-EINVAL); d81e870d5afa1b drivers/media/v4l2-core/videobuf2-dma-contig.c Marek Szyprowski 2012-06-12 483 } 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 484 10791829eb52d5 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-07-21 485 if (WARN_ON(!dev)) 10791829eb52d5 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-07-21 486 return ERR_PTR(-EINVAL); 10791829eb52d5 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-07-21 487 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 488 buf = kzalloc(sizeof *buf, GFP_KERNEL); 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 489 if (!buf) 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 490 return ERR_PTR(-ENOMEM); 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 491 36c0f8b32c4bd4 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2016-04-15 492 buf->dev = dev; cd474037c4a9a9 drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 493 buf->dma_dir = dma_dir; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 494 c4860ad6056483 drivers/media/v4l2-core/videobuf2-dma-contig.c Tvrtko Ursulin 2017-07-31 495 offset = lower_32_bits(offset_in_page(vaddr)); 707947247e9517 drivers/media/common/videobuf2/videobuf2-dma-contig.c Hans Verkuil 2019-04-04 496 vec = vb2_create_framevec(vaddr, size); fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 497 if (IS_ERR(vec)) { fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 498 ret = PTR_ERR(vec); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 499 goto fail_buf; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 500 } fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 501 buf->vec = vec; fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 502 n_pages = frame_vector_count(vec); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 503 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 504 sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 505 if (!sgt) { e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 506 pr_err("failed to allocate sg table\n"); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 507 ret = -ENOMEM; fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 508 goto fail_pfnvec; 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 509 } 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 510 ba9792af6d1881 drivers/media/common/videobuf2/videobuf2-dma-contig.c Christoph Hellwig 2021-07-13 511 ret = sg_alloc_table_from_pages(sgt, vec->pages, n_pages, e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 512 offset, size, GFP_KERNEL); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 513 if (ret) { e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 514 pr_err("failed to initialize sg table\n"); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 515 goto fail_sgt; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 516 } e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 517 251a79f8f5adfd drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 518 /* 251a79f8f5adfd drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 519 * No need to sync to the device, this will happen later when the 251a79f8f5adfd drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 520 * prepare() memop is called. 251a79f8f5adfd drivers/media/v4l2-core/videobuf2-dma-contig.c Hans Verkuil 2014-11-18 521 */ 8b7c0280ab03dd drivers/media/common/videobuf2/videobuf2-dma-contig.c Marek Szyprowski 2020-09-04 522 if (dma_map_sgtable(buf->dev, sgt, buf->dma_dir, 8b7c0280ab03dd drivers/media/common/videobuf2/videobuf2-dma-contig.c Marek Szyprowski 2020-09-04 523 DMA_ATTR_SKIP_CPU_SYNC)) { e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 524 pr_err("failed to map scatterlist\n"); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 525 ret = -EIO; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 526 goto fail_sgt_init; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 527 } e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 528 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 529 contig_size = vb2_dc_get_contiguous_size(sgt); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 530 if (contig_size < size) { e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 531 pr_err("contiguous mapping is too small %lu/%lu\n", e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 532 contig_size, size); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 533 ret = -EFAULT; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 534 goto fail_map_sg; e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 535 } e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 536 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 537 buf->dma_addr = sg_dma_address(sgt->sgl); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 538 buf->dma_sgt = sgt; fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 @539 out: fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 540 buf->size = size; 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 541 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 542 return buf; 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 543 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 544 fail_map_sg: 8b7c0280ab03dd drivers/media/common/videobuf2/videobuf2-dma-contig.c Marek Szyprowski 2020-09-04 545 dma_unmap_sgtable(buf->dev, sgt, buf->dma_dir, DMA_ATTR_SKIP_CPU_SYNC); 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 546 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 547 fail_sgt_init: e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 548 sg_free_table(sgt); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 549 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 550 fail_sgt: e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 551 kfree(sgt); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 552 fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 553 fail_pfnvec: fb639eb3915431 drivers/media/v4l2-core/videobuf2-dma-contig.c Jan Kara 2015-07-13 554 vb2_destroy_framevec(vec); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 555 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 556 fail_buf: 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 557 kfree(buf); e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 558 e15dab752d4c58 drivers/media/v4l2-core/videobuf2-dma-contig.c Tomasz Stanislawski 2012-06-14 559 return ERR_PTR(ret); 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 560 } 1a758d4e847f77 drivers/media/video/videobuf2-dma-contig.c Pawel Osciak 2010-10-11 561 :::::: The code at line 539 was first introduced by commit :::::: fb639eb39154312af8bf08c58cc0142179e0c224 [media] media: vb2: Convert vb2_dc_get_userptr() to use frame vector :::::: TO: Jan Kara <jack(a)suse.cz&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)osg.samsung.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org