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nouveau: restore check that avoids multiple user bos per kernel bo 

Lost in 5ea6f1c326, triggering fdo#89842.

Unlike the PRIME fd->handle interfaces, the GEM_OPEN interface doesn't
do anything at the kernel level to prevent this situation occuring,
and we end up with multiple GEM handles for a single kernel buffer.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
main
Ben Skeggs 2015-05-06 14:34:22 +10:00
parent b4defea65f
commit 812e8fe6ce
1 changed files with 10 additions and 0 deletions
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10
nouveau/nouveau.c
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@ -480,10 +480,20 @@ nouveau_bo_name_ref(struct nouveau_device *dev, uint32_t name,
struct nouveau_bo **pbo)
{
struct nouveau_device_priv *nvdev = nouveau_device(dev);
struct nouveau_bo_priv *nvbo;
struct drm_gem_open req = { .name = name };
int ret;
pthread_mutex_lock(&nvdev->lock);
DRMLISTFOREACHENTRY(nvbo, &nvdev->bo_list, head) {
if (nvbo->name == name) {
ret = nouveau_bo_wrap_locked(dev, nvbo->base.handle,
pbo, name);
pthread_mutex_unlock(&nvdev->lock);
return ret;
}
}
ret = drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req);
if (ret == 0) {
ret = nouveau_bo_wrap_locked(dev, req.handle, pbo, name);