drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:1003 amdgpu_cs_parser_bos() warn: inconsistent returns '&p->bo_list->bo_list_mutex'.
From: Dan Carpenter
Date: Mon Feb 02 2026 - 15:03:11 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 18f7fcd5e69a04df57b563360b88be72471d6b62
commit: e095b55155ef69a8ae0eb114a7fd2a381c012f33 drm/amdgpu: use user provided hmm_range buffer in amdgpu_ttm_tt_get_user_pages
config: s390-randconfig-r072-20260202 (https://download.01.org/0day-ci/archive/20260203/202602030017.7E0xShmH-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 10.5.0
smatch version: v0.5.0-8994-gd50c5a4c
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
| Closes: https://lore.kernel.org/r/202602030017.7E0xShmH-lkp@xxxxxxxxx/
smatch warnings:
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:1003 amdgpu_cs_parser_bos() warn: inconsistent returns '&p->bo_list->bo_list_mutex'.
vim +1003 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
d4e8ad908b2095 Christian König 2022-09-08 855 static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
d4e8ad908b2095 Christian König 2022-09-08 856 union drm_amdgpu_cs *cs)
d4e8ad908b2095 Christian König 2022-09-08 857 {
d4e8ad908b2095 Christian König 2022-09-08 858 struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
ca6c1e210aa7d7 Christian König 2022-04-16 859 struct ttm_operation_ctx ctx = { true, false };
d4e8ad908b2095 Christian König 2022-09-08 860 struct amdgpu_vm *vm = &fpriv->vm;
d4e8ad908b2095 Christian König 2022-09-08 861 struct amdgpu_bo_list_entry *e;
ca6c1e210aa7d7 Christian König 2022-04-16 862 struct drm_gem_object *obj;
ca6c1e210aa7d7 Christian König 2022-04-16 863 unsigned long index;
4624459c84d71e Christian König 2022-03-02 864 unsigned int i;
d4e8ad908b2095 Christian König 2022-09-08 865 int r;
d4e8ad908b2095 Christian König 2022-09-08 866
d4e8ad908b2095 Christian König 2022-09-08 867 /* p->bo_list could already be assigned if AMDGPU_CHUNK_ID_BO_HANDLES is present */
d4e8ad908b2095 Christian König 2022-09-08 868 if (cs->in.bo_list_handle) {
d4e8ad908b2095 Christian König 2022-09-08 869 if (p->bo_list)
d4e8ad908b2095 Christian König 2022-09-08 870 return -EINVAL;
d38ceaf99ed015 Alex Deucher 2015-04-20 871
d4e8ad908b2095 Christian König 2022-09-08 872 r = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle,
d4e8ad908b2095 Christian König 2022-09-08 873 &p->bo_list);
bbca24d0a3c111 Maíra Canal 2022-08-15 874 if (r)
d38ceaf99ed015 Alex Deucher 2015-04-20 875 return r;
d4e8ad908b2095 Christian König 2022-09-08 876 } else if (!p->bo_list) {
d4e8ad908b2095 Christian König 2022-09-08 877 /* Create a empty bo_list when no handle is provided */
d4e8ad908b2095 Christian König 2022-09-08 878 r = amdgpu_bo_list_create(p->adev, p->filp, NULL, 0,
d4e8ad908b2095 Christian König 2022-09-08 879 &p->bo_list);
bbca24d0a3c111 Maíra Canal 2022-08-15 880 if (r)
91e1a5207edec9 Christian König 2015-07-06 881 return r;
d38ceaf99ed015 Alex Deucher 2015-04-20 882 }
b495bd3a54e732 Christian König 2015-09-10 883
d4e8ad908b2095 Christian König 2022-09-08 884 mutex_lock(&p->bo_list->bo_list_mutex);
d5884513a31df0 Christian König 2017-09-08 885
d4e8ad908b2095 Christian König 2022-09-08 886 /* Get userptr backing pages. If pages are updated after registered
d4e8ad908b2095 Christian König 2022-09-08 887 * in amdgpu_gem_userptr_ioctl(), amdgpu_cs_list_validate() will do
d4e8ad908b2095 Christian König 2022-09-08 888 * amdgpu_ttm_backend_bind() to flush and invalidate new pages
d4e8ad908b2095 Christian König 2022-09-08 889 */
d4e8ad908b2095 Christian König 2022-09-08 890 amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
d4e8ad908b2095 Christian König 2022-09-08 891 bool userpage_invalidated = false;
ca6c1e210aa7d7 Christian König 2022-04-16 892 struct amdgpu_bo *bo = e->bo;
ad864d243826ce Andrey Grodzovsky 2017-10-10 893
e095b55155ef69 Sunil Khatri 2025-09-24 894 e->range = kzalloc(sizeof(*e->range), GFP_KERNEL);
e095b55155ef69 Sunil Khatri 2025-09-24 895 if (unlikely(!e->range))
e095b55155ef69 Sunil Khatri 2025-09-24 896 return -ENOMEM;
Need to cleanup and unlock before returning.
e095b55155ef69 Sunil Khatri 2025-09-24 897
e095b55155ef69 Sunil Khatri 2025-09-24 898 r = amdgpu_ttm_tt_get_user_pages(bo, e->range);
c5b3cc417b0260 Sunil Khatri 2025-09-17 899 if (r)
d4e8ad908b2095 Christian König 2022-09-08 900 goto out_free_user_pages;
d38ceaf99ed015 Alex Deucher 2015-04-20 901
d4e8ad908b2095 Christian König 2022-09-08 902 for (i = 0; i < bo->tbo.ttm->num_pages; i++) {
c5b3cc417b0260 Sunil Khatri 2025-09-17 903 if (bo->tbo.ttm->pages[i] != hmm_pfn_to_page(e->range->hmm_pfns[i])) {
d4e8ad908b2095 Christian König 2022-09-08 904 userpage_invalidated = true;
d4e8ad908b2095 Christian König 2022-09-08 905 break;
d4e8ad908b2095 Christian König 2022-09-08 906 }
d4e8ad908b2095 Christian König 2022-09-08 907 }
d4e8ad908b2095 Christian König 2022-09-08 908 e->user_invalidated = userpage_invalidated;
9a79588c42bf89 Christian König 2016-06-22 909 }
9a79588c42bf89 Christian König 2016-06-22 910
ca6c1e210aa7d7 Christian König 2022-04-16 911 drm_exec_until_all_locked(&p->exec) {
ca6c1e210aa7d7 Christian König 2022-04-16 912 r = amdgpu_vm_lock_pd(&fpriv->vm, &p->exec, 1 + p->gang_size);
ca6c1e210aa7d7 Christian König 2022-04-16 913 drm_exec_retry_on_contention(&p->exec);
ca6c1e210aa7d7 Christian König 2022-04-16 914 if (unlikely(r))
d4e8ad908b2095 Christian König 2022-09-08 915 goto out_free_user_pages;
d38ceaf99ed015 Alex Deucher 2015-04-20 916
d4e8ad908b2095 Christian König 2022-09-08 917 amdgpu_bo_list_for_each_entry(e, p->bo_list) {
ca6c1e210aa7d7 Christian König 2022-04-16 918 /* One fence for TTM and one for each CS job */
ca6c1e210aa7d7 Christian König 2022-04-16 919 r = drm_exec_prepare_obj(&p->exec, &e->bo->tbo.base,
ca6c1e210aa7d7 Christian König 2022-04-16 920 1 + p->gang_size);
ca6c1e210aa7d7 Christian König 2022-04-16 921 drm_exec_retry_on_contention(&p->exec);
ca6c1e210aa7d7 Christian König 2022-04-16 922 if (unlikely(r))
ca6c1e210aa7d7 Christian König 2022-04-16 923 goto out_free_user_pages;
d38ceaf99ed015 Alex Deucher 2015-04-20 924
ca6c1e210aa7d7 Christian König 2022-04-16 925 e->bo_va = amdgpu_vm_bo_find(vm, e->bo);
ca6c1e210aa7d7 Christian König 2022-04-16 926 }
ca6c1e210aa7d7 Christian König 2022-04-16 927
ca6c1e210aa7d7 Christian König 2022-04-16 928 if (p->uf_bo) {
ca6c1e210aa7d7 Christian König 2022-04-16 929 r = drm_exec_prepare_obj(&p->exec, &p->uf_bo->tbo.base,
ca6c1e210aa7d7 Christian König 2022-04-16 930 1 + p->gang_size);
ca6c1e210aa7d7 Christian König 2022-04-16 931 drm_exec_retry_on_contention(&p->exec);
ca6c1e210aa7d7 Christian König 2022-04-16 932 if (unlikely(r))
ca6c1e210aa7d7 Christian König 2022-04-16 933 goto out_free_user_pages;
ca6c1e210aa7d7 Christian König 2022-04-16 934 }
ca6c1e210aa7d7 Christian König 2022-04-16 935 }
ca6c1e210aa7d7 Christian König 2022-04-16 936
ca6c1e210aa7d7 Christian König 2022-04-16 937 amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
ca6c1e210aa7d7 Christian König 2022-04-16 938 struct mm_struct *usermm;
ca6c1e210aa7d7 Christian König 2022-04-16 939
ca6c1e210aa7d7 Christian König 2022-04-16 940 usermm = amdgpu_ttm_tt_get_usermm(e->bo->tbo.ttm);
ca6c1e210aa7d7 Christian König 2022-04-16 941 if (usermm && usermm != current->mm) {
ca6c1e210aa7d7 Christian König 2022-04-16 942 r = -EPERM;
ca6c1e210aa7d7 Christian König 2022-04-16 943 goto out_free_user_pages;
ca6c1e210aa7d7 Christian König 2022-04-16 944 }
ca6c1e210aa7d7 Christian König 2022-04-16 945
ca6c1e210aa7d7 Christian König 2022-04-16 946 if (amdgpu_ttm_tt_is_userptr(e->bo->tbo.ttm) &&
c5b3cc417b0260 Sunil Khatri 2025-09-17 947 e->user_invalidated) {
ca6c1e210aa7d7 Christian König 2022-04-16 948 amdgpu_bo_placement_from_domain(e->bo,
ca6c1e210aa7d7 Christian König 2022-04-16 949 AMDGPU_GEM_DOMAIN_CPU);
ca6c1e210aa7d7 Christian König 2022-04-16 950 r = ttm_bo_validate(&e->bo->tbo, &e->bo->placement,
ca6c1e210aa7d7 Christian König 2022-04-16 951 &ctx);
ca6c1e210aa7d7 Christian König 2022-04-16 952 if (r)
ca6c1e210aa7d7 Christian König 2022-04-16 953 goto out_free_user_pages;
ca6c1e210aa7d7 Christian König 2022-04-16 954
ca6c1e210aa7d7 Christian König 2022-04-16 955 amdgpu_ttm_tt_set_user_pages(e->bo->tbo.ttm,
c5b3cc417b0260 Sunil Khatri 2025-09-17 956 e->range);
ca6c1e210aa7d7 Christian König 2022-04-16 957 }
d4e8ad908b2095 Christian König 2022-09-08 958 }
d38ceaf99ed015 Alex Deucher 2015-04-20 959
d4e8ad908b2095 Christian König 2022-09-08 960 amdgpu_cs_get_threshold_for_moves(p->adev, &p->bytes_moved_threshold,
d4e8ad908b2095 Christian König 2022-09-08 961 &p->bytes_moved_vis_threshold);
d4e8ad908b2095 Christian König 2022-09-08 962 p->bytes_moved = 0;
d4e8ad908b2095 Christian König 2022-09-08 963 p->bytes_moved_vis = 0;
9a1b3af10d6268 Monk Liu 2017-03-08 964
50661eb1a2c88c Felix Kuehling 2024-01-03 965 r = amdgpu_vm_validate(p->adev, &fpriv->vm, NULL,
d4e8ad908b2095 Christian König 2022-09-08 966 amdgpu_cs_bo_validate, p);
d4e8ad908b2095 Christian König 2022-09-08 967 if (r) {
cc51bbc7d7a7ff Mario Limonciello 2025-07-15 968 drm_err(adev_to_drm(p->adev), "amdgpu_vm_validate() failed.\n");
ca6c1e210aa7d7 Christian König 2022-04-16 969 goto out_free_user_pages;
65333e4429c60b Monk Liu 2017-03-27 970 }
9a1b3af10d6268 Monk Liu 2017-03-08 971
ca6c1e210aa7d7 Christian König 2022-04-16 972 drm_exec_for_each_locked_object(&p->exec, index, obj) {
ca6c1e210aa7d7 Christian König 2022-04-16 973 r = amdgpu_cs_bo_validate(p, gem_to_amdgpu_bo(obj));
ca6c1e210aa7d7 Christian König 2022-04-16 974 if (unlikely(r))
ca6c1e210aa7d7 Christian König 2022-04-16 975 goto out_free_user_pages;
ca6c1e210aa7d7 Christian König 2022-04-16 976 }
b07c60c0652c49 Christian König 2016-01-31 977
ca6c1e210aa7d7 Christian König 2022-04-16 978 if (p->uf_bo) {
ca6c1e210aa7d7 Christian König 2022-04-16 979 r = amdgpu_ttm_alloc_gart(&p->uf_bo->tbo);
ca6c1e210aa7d7 Christian König 2022-04-16 980 if (unlikely(r))
ca6c1e210aa7d7 Christian König 2022-04-16 981 goto out_free_user_pages;
4953b6b22ab9d7 Christian König 2022-09-13 982
ca6c1e210aa7d7 Christian König 2022-04-16 983 p->gang_leader->uf_addr += amdgpu_bo_gpu_offset(p->uf_bo);
d38ceaf99ed015 Alex Deucher 2015-04-20 984 }
d38ceaf99ed015 Alex Deucher 2015-04-20 985
4953b6b22ab9d7 Christian König 2022-09-13 986 amdgpu_cs_report_moved_bytes(p->adev, p->bytes_moved,
4953b6b22ab9d7 Christian König 2022-09-13 987 p->bytes_moved_vis);
4624459c84d71e Christian König 2022-03-02 988
4624459c84d71e Christian König 2022-03-02 989 for (i = 0; i < p->gang_size; ++i)
4624459c84d71e Christian König 2022-03-02 990 amdgpu_job_set_resources(p->jobs[i], p->bo_list->gds_obj,
4624459c84d71e Christian König 2022-03-02 991 p->bo_list->gws_obj,
4624459c84d71e Christian König 2022-03-02 992 p->bo_list->oa_obj);
4953b6b22ab9d7 Christian König 2022-09-13 993 return 0;
4953b6b22ab9d7 Christian König 2022-09-13 994
d4e8ad908b2095 Christian König 2022-09-08 995 out_free_user_pages:
d4e8ad908b2095 Christian König 2022-09-08 996 amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
ca6c1e210aa7d7 Christian König 2022-04-16 997 struct amdgpu_bo *bo = e->bo;
d38ceaf99ed015 Alex Deucher 2015-04-20 998
fec8fdb54e8f74 Christian König 2022-11-10 999 amdgpu_ttm_tt_get_user_pages_done(bo->tbo.ttm, e->range);
fec8fdb54e8f74 Christian König 2022-11-10 1000 e->range = NULL;
d4e8ad908b2095 Christian König 2022-09-08 1001 }
c70e2166967dc4 Philip Yang 2022-11-03 1002 mutex_unlock(&p->bo_list->bo_list_mutex);
d4e8ad908b2095 Christian König 2022-09-08 @1003 return r;
d38ceaf99ed015 Alex Deucher 2015-04-20 1004 }
--
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