From 483bfc8ea604644bc3d7b36f586bbab7e98b0189 Mon Sep 17 00:00:00 2001
From: DesktopECHO <33142753+DesktopECHO@users.noreply.github.com>
Date: Wed, 15 Jul 2026 22:46:35 -0300
Subject: [PATCH] drm/asahi: Clean up deferred BOs when dropping a VM

Since immediate mode was enabled, unmapping a GPU VA can defer
drm_gpuvm_bo destruction until drm_gpuvm_bo_deferred_cleanup() is called.
The GEM bind and unbind paths drain that list, but Vm::drop() unmaps the
remaining user ranges without doing so.

Drain the deferred list after both teardown unmaps. Otherwise a deferred
drm_gpuvm_bo retains the imported GEM and dma-buf after its DRM file is
closed, leaving its backing pages pinned.

Fixes: 2aeee2dd4a79 ("drm/asahi: Switch gpuvm to DRM_GPUVM_IMMEDIATE_MODE")
Signed-off-by: DesktopECHO <33142753+DesktopECHO@users.noreply.github.com>
---
 drivers/gpu/drm/asahi/file.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/asahi/file.rs b/drivers/gpu/drm/asahi/file.rs
index 02a4ce874a92c8..061f289e40d933 100644
--- a/drivers/gpu/drm/asahi/file.rs
+++ b/drivers/gpu/drm/asahi/file.rs
@@ -87,6 +87,8 @@ impl Drop for Vm {
         {
             pr_err!("Vm::Drop: vm.unmap_range() failed\n");
         }
+
+        self.vm.bo_deferred_cleanup();
     }
 }