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drm/etnaviv: populate GEM objects on cpu_prep

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CPU prep is the point where we can reasonably return an error to userspace
when something goes wrong while populating the object. If we leave the
object unpopulated at this point, the allocation will happen in the
fault handler when userspace accesses the object through the mmap space,
where we don't have any other option than to OOM the system.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
This commit is contained in:
Lucas Stach 2017-06-06 09:17:08 +02:00 committed by Lucas Stach
parent f91ac470a8
commit 8cc47b3ea0
1 changed files with 10 additions and 10 deletions
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20
drivers/gpu/drm/etnaviv/etnaviv_gem.c
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@ -413,6 +413,16 @@ int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
bool write = !!(op & ETNA_PREP_WRITE);
int ret;
if (!etnaviv_obj->sgt) {
void *ret;
mutex_lock(&etnaviv_obj->lock);
ret = etnaviv_gem_get_pages(etnaviv_obj);
mutex_unlock(&etnaviv_obj->lock);
if (IS_ERR(ret))
return PTR_ERR(ret);
}
if (op & ETNA_PREP_NOSYNC) {
if (!reservation_object_test_signaled_rcu(etnaviv_obj->resv,
write))
@ -427,16 +437,6 @@ int etnaviv_gem_cpu_prep(struct drm_gem_object *obj, u32 op,
}
if (etnaviv_obj->flags & ETNA_BO_CACHED) {
if (!etnaviv_obj->sgt) {
void *ret;
mutex_lock(&etnaviv_obj->lock);
ret = etnaviv_gem_get_pages(etnaviv_obj);
mutex_unlock(&etnaviv_obj->lock);
if (IS_ERR(ret))
return PTR_ERR(ret);
}
dma_sync_sg_for_cpu(dev->dev, etnaviv_obj->sgt->sgl,
etnaviv_obj->sgt->nents,
etnaviv_op_to_dma_dir(op));