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path: root/drivers/gpu/drm/panfrost/panfrost_mmu.c
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Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_mmu.c')
-rw-r--r--drivers/gpu/drm/panfrost/panfrost_mmu.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 762b1bd2a8c2..92ac995dd9c6 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -156,6 +156,9 @@ int panfrost_mmu_map(struct panfrost_gem_object *bo)
struct sg_table *sgt;
int ret;
+ if (WARN_ON(bo->is_mapped))
+ return 0;
+
sgt = drm_gem_shmem_get_pages_sgt(obj);
if (WARN_ON(IS_ERR(sgt)))
return PTR_ERR(sgt);
@@ -189,6 +192,7 @@ int panfrost_mmu_map(struct panfrost_gem_object *bo)
pm_runtime_mark_last_busy(pfdev->dev);
pm_runtime_put_autosuspend(pfdev->dev);
+ bo->is_mapped = true;
return 0;
}
@@ -203,6 +207,9 @@ void panfrost_mmu_unmap(struct panfrost_gem_object *bo)
size_t unmapped_len = 0;
int ret;
+ if (WARN_ON(!bo->is_mapped))
+ return;
+
dev_dbg(pfdev->dev, "unmap: iova=%llx, len=%zx", iova, len);
ret = pm_runtime_get_sync(pfdev->dev);
@@ -230,6 +237,7 @@ void panfrost_mmu_unmap(struct panfrost_gem_object *bo)
pm_runtime_mark_last_busy(pfdev->dev);
pm_runtime_put_autosuspend(pfdev->dev);
+ bo->is_mapped = false;
}
static void mmu_tlb_inv_context_s1(void *cookie)