drivers/gpu/drm/xe/xe_guc_submit.c:1144:1-7: preceding lock on line 1100 (fwd)
From: Julia Lawall
Date: Thu Jan 25 2024 - 12:00:09 EST
Please check whether a mutex_unlock is needed before line 1104.
julia
---------- Forwarded message ----------
Date: Fri, 26 Jan 2024 00:47:54 +0800
From: kernel test robot <lkp@xxxxxxxxx>
To: oe-kbuild@xxxxxxxxxxxxxxx
Cc: lkp@xxxxxxxxx, Julia Lawall <julia.lawall@xxxxxxxx>
Subject: drivers/gpu/drm/xe/xe_guc_submit.c:1144:1-7: preceding lock on line
1100
BCC: lkp@xxxxxxxxx
CC: oe-kbuild-all@xxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx
TO: Matthew Brost <matthew.brost@xxxxxxxxx>
CC: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6098d87eaf31f48153c984e2adadf14762520a87
commit: dd08ebf6c3525a7ea2186e636df064ea47281987 drm/xe: Introduce a new DRM driver for Intel GPUs
date: 6 weeks ago
:::::: branch date: 16 hours ago
:::::: commit date: 6 weeks ago
config: powerpc64-randconfig-r052-20240125 (https://download.01.org/0day-ci/archive/20240126/202401260056.LFLxAl9Z-lkp@xxxxxxxxx/config)
compiler: powerpc64-linux-gcc (GCC) 13.2.0
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: Julia Lawall <julia.lawall@xxxxxxxx>
| Closes: https://lore.kernel.org/r/202401260056.LFLxAl9Z-lkp@xxxxxxxxx/
cocci warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/xe/xe_guc_submit.c:1144:1-7: preceding lock on line 1100
vim +1144 drivers/gpu/drm/xe/xe_guc_submit.c
dd08ebf6c3525a Matthew Brost 2023-03-30 1067
dd08ebf6c3525a Matthew Brost 2023-03-30 1068 static int guc_engine_init(struct xe_engine *e)
dd08ebf6c3525a Matthew Brost 2023-03-30 1069 {
dd08ebf6c3525a Matthew Brost 2023-03-30 1070 struct xe_gpu_scheduler *sched;
dd08ebf6c3525a Matthew Brost 2023-03-30 1071 struct xe_guc *guc = engine_to_guc(e);
dd08ebf6c3525a Matthew Brost 2023-03-30 1072 struct xe_guc_engine *ge;
dd08ebf6c3525a Matthew Brost 2023-03-30 1073 long timeout;
dd08ebf6c3525a Matthew Brost 2023-03-30 1074 int err;
dd08ebf6c3525a Matthew Brost 2023-03-30 1075
dd08ebf6c3525a Matthew Brost 2023-03-30 1076 XE_BUG_ON(!xe_device_guc_submission_enabled(guc_to_xe(guc)));
dd08ebf6c3525a Matthew Brost 2023-03-30 1077
dd08ebf6c3525a Matthew Brost 2023-03-30 1078 ge = kzalloc(sizeof(*ge), GFP_KERNEL);
dd08ebf6c3525a Matthew Brost 2023-03-30 1079 if (!ge)
dd08ebf6c3525a Matthew Brost 2023-03-30 1080 return -ENOMEM;
dd08ebf6c3525a Matthew Brost 2023-03-30 1081
dd08ebf6c3525a Matthew Brost 2023-03-30 1082 e->guc = ge;
dd08ebf6c3525a Matthew Brost 2023-03-30 1083 ge->engine = e;
dd08ebf6c3525a Matthew Brost 2023-03-30 1084 init_waitqueue_head(&ge->suspend_wait);
dd08ebf6c3525a Matthew Brost 2023-03-30 1085
dd08ebf6c3525a Matthew Brost 2023-03-30 1086 timeout = xe_vm_no_dma_fences(e->vm) ? MAX_SCHEDULE_TIMEOUT : HZ * 5;
dd08ebf6c3525a Matthew Brost 2023-03-30 1087 err = xe_sched_init(&ge->sched, &drm_sched_ops, &xe_sched_ops, NULL,
dd08ebf6c3525a Matthew Brost 2023-03-30 1088 e->lrc[0].ring.size / MAX_JOB_SIZE_BYTES,
dd08ebf6c3525a Matthew Brost 2023-03-30 1089 64, timeout, guc_to_gt(guc)->ordered_wq, NULL,
dd08ebf6c3525a Matthew Brost 2023-03-30 1090 e->name, gt_to_xe(e->gt)->drm.dev);
dd08ebf6c3525a Matthew Brost 2023-03-30 1091 if (err)
dd08ebf6c3525a Matthew Brost 2023-03-30 1092 goto err_free;
dd08ebf6c3525a Matthew Brost 2023-03-30 1093
dd08ebf6c3525a Matthew Brost 2023-03-30 1094 sched = &ge->sched;
dd08ebf6c3525a Matthew Brost 2023-03-30 1095 err = xe_sched_entity_init(&ge->entity, sched);
dd08ebf6c3525a Matthew Brost 2023-03-30 1096 if (err)
dd08ebf6c3525a Matthew Brost 2023-03-30 1097 goto err_sched;
dd08ebf6c3525a Matthew Brost 2023-03-30 1098 e->priority = XE_ENGINE_PRIORITY_NORMAL;
dd08ebf6c3525a Matthew Brost 2023-03-30 1099
dd08ebf6c3525a Matthew Brost 2023-03-30 @1100 mutex_lock(&guc->submission_state.lock);
dd08ebf6c3525a Matthew Brost 2023-03-30 1101
dd08ebf6c3525a Matthew Brost 2023-03-30 1102 err = alloc_guc_id(guc, e);
dd08ebf6c3525a Matthew Brost 2023-03-30 1103 if (err)
dd08ebf6c3525a Matthew Brost 2023-03-30 1104 goto err_entity;
dd08ebf6c3525a Matthew Brost 2023-03-30 1105
dd08ebf6c3525a Matthew Brost 2023-03-30 1106 e->entity = &ge->entity;
dd08ebf6c3525a Matthew Brost 2023-03-30 1107
dd08ebf6c3525a Matthew Brost 2023-03-30 1108 if (guc_read_stopped(guc))
dd08ebf6c3525a Matthew Brost 2023-03-30 1109 xe_sched_stop(sched);
dd08ebf6c3525a Matthew Brost 2023-03-30 1110
dd08ebf6c3525a Matthew Brost 2023-03-30 1111 mutex_unlock(&guc->submission_state.lock);
dd08ebf6c3525a Matthew Brost 2023-03-30 1112
dd08ebf6c3525a Matthew Brost 2023-03-30 1113 switch (e->class) {
dd08ebf6c3525a Matthew Brost 2023-03-30 1114 case XE_ENGINE_CLASS_RENDER:
dd08ebf6c3525a Matthew Brost 2023-03-30 1115 sprintf(e->name, "rcs%d", e->guc->id);
dd08ebf6c3525a Matthew Brost 2023-03-30 1116 break;
dd08ebf6c3525a Matthew Brost 2023-03-30 1117 case XE_ENGINE_CLASS_VIDEO_DECODE:
dd08ebf6c3525a Matthew Brost 2023-03-30 1118 sprintf(e->name, "vcs%d", e->guc->id);
dd08ebf6c3525a Matthew Brost 2023-03-30 1119 break;
dd08ebf6c3525a Matthew Brost 2023-03-30 1120 case XE_ENGINE_CLASS_VIDEO_ENHANCE:
dd08ebf6c3525a Matthew Brost 2023-03-30 1121 sprintf(e->name, "vecs%d", e->guc->id);
dd08ebf6c3525a Matthew Brost 2023-03-30 1122 break;
dd08ebf6c3525a Matthew Brost 2023-03-30 1123 case XE_ENGINE_CLASS_COPY:
dd08ebf6c3525a Matthew Brost 2023-03-30 1124 sprintf(e->name, "bcs%d", e->guc->id);
dd08ebf6c3525a Matthew Brost 2023-03-30 1125 break;
dd08ebf6c3525a Matthew Brost 2023-03-30 1126 case XE_ENGINE_CLASS_COMPUTE:
dd08ebf6c3525a Matthew Brost 2023-03-30 1127 sprintf(e->name, "ccs%d", e->guc->id);
dd08ebf6c3525a Matthew Brost 2023-03-30 1128 break;
dd08ebf6c3525a Matthew Brost 2023-03-30 1129 default:
dd08ebf6c3525a Matthew Brost 2023-03-30 1130 XE_WARN_ON(e->class);
dd08ebf6c3525a Matthew Brost 2023-03-30 1131 }
dd08ebf6c3525a Matthew Brost 2023-03-30 1132
dd08ebf6c3525a Matthew Brost 2023-03-30 1133 trace_xe_engine_create(e);
dd08ebf6c3525a Matthew Brost 2023-03-30 1134
dd08ebf6c3525a Matthew Brost 2023-03-30 1135 return 0;
dd08ebf6c3525a Matthew Brost 2023-03-30 1136
dd08ebf6c3525a Matthew Brost 2023-03-30 1137 err_entity:
dd08ebf6c3525a Matthew Brost 2023-03-30 1138 xe_sched_entity_fini(&ge->entity);
dd08ebf6c3525a Matthew Brost 2023-03-30 1139 err_sched:
dd08ebf6c3525a Matthew Brost 2023-03-30 1140 xe_sched_fini(&ge->sched);
dd08ebf6c3525a Matthew Brost 2023-03-30 1141 err_free:
dd08ebf6c3525a Matthew Brost 2023-03-30 1142 kfree(ge);
dd08ebf6c3525a Matthew Brost 2023-03-30 1143
dd08ebf6c3525a Matthew Brost 2023-03-30 @1144 return err;
dd08ebf6c3525a Matthew Brost 2023-03-30 1145 }
dd08ebf6c3525a Matthew Brost 2023-03-30 1146
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