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drm/amdgpu: fix holding mn_lock while allocating memory 

We can't hold the mn_lock while allocating memory.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-08-24 14:48:02 +02:00 committed by Alex Deucher
parent 72ef23de20
commit 4a2de54dc1
1 changed files with 19 additions and 12 deletions
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31
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -1203,26 +1203,24 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
int r;
job = p->job;
p->job = NULL;
r = drm_sched_job_init(&job->base, entity, p->filp);
if (r)
goto error_unlock;
/* No memory allocation is allowed while holding the mn lock */
amdgpu_mn_lock(p->mn);
amdgpu_bo_list_for_each_userptr_entry(e, p->bo_list) {
struct amdgpu_bo *bo = e->robj;
if (amdgpu_ttm_tt_userptr_needs_pages(bo->tbo.ttm)) {
amdgpu_mn_unlock(p->mn);
return -ERESTARTSYS;
r = -ERESTARTSYS;
goto error_abort;
}
}
job = p->job;
p->job = NULL;
r = drm_sched_job_init(&job->base, entity, p->filp);
if (r) {
amdgpu_job_free(job);
amdgpu_mn_unlock(p->mn);
return r;
}
job->owner = p->filp;
p->fence = dma_fence_get(&job->base.s_fence->finished);
@ -1260,6 +1258,15 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
amdgpu_mn_unlock(p->mn);
return 0;
error_abort:
dma_fence_put(&job->base.s_fence->finished);
job->base.s_fence = NULL;
error_unlock:
amdgpu_job_free(job);
amdgpu_mn_unlock(p->mn);
return r;
}
int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)