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From 6d67ef14d229b287466922f85829d2f883a5ab06 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Tue, 5 Sep 2017 15:10:50 +0200
Subject: [PATCH 1799/4131] drm/amdgpu: revert "fix deadlock of reservation
between cs and gpu reset v2"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This reverts commit 10e709cb296c98424c03408d23e3addeddcd4088.
The patch doesn't work at all:
1. The CS can still be blocked because of amdgpu_ctx_add_fence().
2. The order of submission isn't correct any more.
3. We could end up using freed up memory because we now drop the
ctx reference to early.
This needs to be fixed cleanly by doing the context handling after the BO
handling, but this is a larger task just avoid the obvious crashes for now.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu monk.liu@amd.com
---
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 1b903a7..5327c04 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -1201,7 +1201,6 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
cs->out.handle = amdgpu_ctx_add_fence(p->ctx, ring, p->fence);
job->uf_sequence = cs->out.handle;
amdgpu_job_free_resources(job);
- amdgpu_cs_parser_fini(p, 0, true);
trace_amdgpu_cs_ioctl(job);
amd_sched_entity_push_job(&job->base);
@@ -1259,10 +1258,7 @@ int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
goto out;
r = amdgpu_cs_submit(&parser, cs);
- if (r)
- goto out;
- return 0;
out:
amdgpu_cs_parser_fini(&parser, r, reserved_buffers);
return r;
--
2.7.4
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