From e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas.hellstrom@linux.intel.com>
Date: Mon, 26 Jun 2023 11:14:49 +0200
Subject: [PATCH] drm/ttm: Don't leak a resource on eviction error
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Git-commit: e8188c461ee015ba0b9ab2fc82dbd5ebca5a5532
Patch-mainline: v6.5-rc2
References: git-fixes
On eviction errors other than -EMULTIHOP we were leaking a resource.
Fix.
V2:
- Avoid yet another goto (Andi Shyti)
Fixes: 403797925768 ("drm/ttm: Fix multihop assert on eviction.")
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.15+
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com> #v1
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230626091450.14757-4-thomas.hellstrom@linux.intel.com
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/ttm/ttm_bo.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index bd5dae4d1624..d364639a2752 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -458,18 +458,18 @@ static int ttm_bo_evict(struct ttm_buffer_object *bo,
goto out;
}
-bounce:
- ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop);
- if (ret == -EMULTIHOP) {
+ do {
+ ret = ttm_bo_handle_move_mem(bo, evict_mem, true, ctx, &hop);
+ if (ret != -EMULTIHOP)
+ break;
+
ret = ttm_bo_bounce_temp_buffer(bo, &evict_mem, ctx, &hop);
- if (ret) {
- if (ret != -ERESTARTSYS && ret != -EINTR)
- pr_err("Buffer eviction failed\n");
- ttm_resource_free(bo, &evict_mem);
- goto out;
- }
- /* try and move to final place now. */
- goto bounce;
+ } while (!ret);
+
+ if (ret) {
+ ttm_resource_free(bo, &evict_mem);
+ if (ret != -ERESTARTSYS && ret != -EINTR)
+ pr_err("Buffer eviction failed\n");
}
out:
return ret;
--
2.43.0