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From 138a4a1b2b33df8f640163553d40a7630984122b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Fri, 24 Aug 2018 14:48:02 +0200
Subject: [PATCH 5224/5725] drm/amdgpu: fix holding mn_lock while allocating
memory
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
Signed-off-by: Raveendra Talabattula <raveendra.talabattula@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index c2a5caa..f7fa60b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1210,26 +1210,24 @@ 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, &ring->sched, 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, &ring->sched, 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);
@@ -1254,6 +1252,15 @@ 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)
--
2.7.4
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