amdgpu: use alloca for dependencies and sem_dependencies

Use alloca instead of malloc, then we don't need free them at the end of this
function.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/amdgpu/amdgpu_cs.c b/amdgpu/amdgpu_cs.c
index 1bd974f..aaa1f7b 100644 (file)
--- a/amdgpu/amdgpu_cs.c
+++ b/amdgpu/amdgpu_cs.c
@@ -295,7 +295,7 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
        }
 
        if (ibs_request->number_of_dependencies) {
-               dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_dep) *
+               dependencies = alloca(sizeof(struct drm_amdgpu_cs_chunk_dep) *
                        ibs_request->number_of_dependencies);
                if (!dependencies) {
                        r = -ENOMEM;
@@ -326,7 +326,7 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
        LIST_FOR_EACH_ENTRY(sem, sem_list, list)
                sem_count++;
        if (sem_count) {
-               sem_dependencies = malloc(sizeof(struct drm_amdgpu_cs_chunk_dep) * sem_count);
+               sem_dependencies = alloca(sizeof(struct drm_amdgpu_cs_chunk_dep) * sem_count);
                if (!sem_dependencies) {
                        r = -ENOMEM;
                        goto error_unlock;
@@ -363,8 +363,6 @@ static int amdgpu_cs_submit_one(amdgpu_context_handle context,
        context->last_seq[ibs_request->ip_type][ibs_request->ip_instance][ibs_request->ring] = ibs_request->seq_no;
 error_unlock:
        pthread_mutex_unlock(&context->sequence_mutex);
-       free(dependencies);
-       free(sem_dependencies);
        return r;
 }