drm/msm/a6xx: Replace kcalloc() with kvzalloc()

In order to reduce chance of allocation failure while capturing a6xx
gpu state, use kvzalloc() instead of kcalloc() in state_kcalloc().

Indirectly, this patch helps to fix leaking memory allocated for
gmu_debug object.

Fixes: b859f9b009b (drm/msm/gpu: Snapshot GMU debug buffer)
Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/505074/
Link: https://lore.kernel.org/r/20220928124830.1.I8ea24a8d586b4978823b848adde000f92f74d5c2@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 55f4433..3c112a6 100644 (file)
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -91,7 +91,7 @@ struct a6xx_state_memobj {
 static void *state_kcalloc(struct a6xx_gpu_state *a6xx_state, int nr, size_t objsize)
 {
        struct a6xx_state_memobj *obj =
-               kzalloc((nr * objsize) + sizeof(*obj), GFP_KERNEL);
+               kvzalloc((nr * objsize) + sizeof(*obj), GFP_KERNEL);
 
        if (!obj)
                return NULL;
@@ -819,7 +819,7 @@ static struct msm_gpu_state_bo *a6xx_snapshot_gmu_bo(
 
        snapshot->iova = bo->iova;
        snapshot->size = bo->size;
-       snapshot->data = kvzalloc(snapshot->size, GFP_KERNEL);
+       snapshot->data = state_kcalloc(a6xx_state, 1, snapshot->size);
        if (!snapshot->data)
                return NULL;
 
@@ -1034,14 +1034,8 @@ static void a6xx_gpu_state_destroy(struct kref *kref)
        struct a6xx_gpu_state *a6xx_state = container_of(state,
                        struct a6xx_gpu_state, base);
 
-       if (a6xx_state->gmu_log)
-               kvfree(a6xx_state->gmu_log->data);
-
-       if (a6xx_state->gmu_hfi)
-               kvfree(a6xx_state->gmu_hfi->data);
-
        list_for_each_entry_safe(obj, tmp, &a6xx_state->objs, node)
-               kfree(obj);
+               kvfree(obj);
 
        adreno_gpu_state_destroy(state);
        kfree(a6xx_state);