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drm/nouveau: drop drm_global_mutex before sleeping in submission path

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If we keep hold of the mutex here, the process which currently holds the
buffer object will never be able to release it, causing a deadlock.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-08-26 15:02:32 +10:00
parent e3461a2bc0
commit ab699ec64a
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/nouveau/nouveau_gem.c
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@ -337,7 +337,9 @@ retry:
return -EINVAL; return -EINVAL;
} }
mutex_unlock(&drm_global_mutex);
ret = ttm_bo_wait_cpu(&nvbo->bo, false); ret = ttm_bo_wait_cpu(&nvbo->bo, false);
mutex_lock(&drm_global_mutex);
if (ret) { if (ret) {
NV_ERROR(dev, "fail wait_cpu\n"); NV_ERROR(dev, "fail wait_cpu\n");
return ret; return ret;