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drm/amdgpu: add proper error handling to amdgpu_bo_list_get 

Otherwise we silently don't use a BO list when the handle is invalid.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-07-27 15:32:04 +02:00 committed by Alex Deucher
parent ccf9ef0b0d
commit 52c054caf8
3 changed files with 20 additions and 23 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -713,8 +713,8 @@ struct amdgpu_bo_list {
struct amdgpu_bo_list_entry *array;
};
struct amdgpu_bo_list *
amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id);
int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
struct amdgpu_bo_list **result);
void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
struct list_head *validated);
void amdgpu_bo_list_put(struct amdgpu_bo_list *list);

28
drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
View File

@ -180,27 +180,20 @@ static int amdgpu_bo_list_set(struct amdgpu_device *adev,
return r;
}
struct amdgpu_bo_list *
amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id)
int amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id,
struct amdgpu_bo_list **result)
{
struct amdgpu_bo_list *result;
rcu_read_lock();
result = idr_find(&fpriv->bo_list_handles, id);
*result = idr_find(&fpriv->bo_list_handles, id);
if (result) {
if (kref_get_unless_zero(&result->refcount)) {
rcu_read_unlock();
mutex_lock(&result->lock);
} else {
rcu_read_unlock();
result = NULL;
}
} else {
if (*result && kref_get_unless_zero(&(*result)->refcount)) {
rcu_read_unlock();
mutex_lock(&(*result)->lock);
return 0;
}
return result;
rcu_read_unlock();
return -ENOENT;
}
void amdgpu_bo_list_get_list(struct amdgpu_bo_list *list,
@ -335,9 +328,8 @@ int amdgpu_bo_list_ioctl(struct drm_device *dev, void *data,
break;
case AMDGPU_BO_LIST_OP_UPDATE:
r = -ENOENT;
list = amdgpu_bo_list_get(fpriv, handle);
if (!list)
r = amdgpu_bo_list_get(fpriv, handle, &list);
if (r)
goto error_free;
r = amdgpu_bo_list_set(adev, filp, list, info,

11
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
View File

@ -572,11 +572,16 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
INIT_LIST_HEAD(&p->validated);
/* p->bo_list could already be assigned if AMDGPU_CHUNK_ID_BO_HANDLES is present */
if (!p->bo_list)
p->bo_list = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle);
else
if (p->bo_list) {
mutex_lock(&p->bo_list->lock);
} else if (cs->in.bo_list_handle) {
r = amdgpu_bo_list_get(fpriv, cs->in.bo_list_handle,
&p->bo_list);
if (r)
return r;
}
if (p->bo_list) {
amdgpu_bo_list_get_list(p->bo_list, &p->validated);
if (p->bo_list->first_userptr != p->bo_list->num_entries)