From 35ba8850b673050b71b17c1421079031f4fda319 Mon Sep 17 00:00:00 2001
From: Jack Xiao <Jack.Xiao@amd.com>
Date: Thu, 7 Jul 2022 20:57:34 +0800
Subject: drm/amdgpu/mes: fix mes submission in atomic context
For some cases (accessing registers, unmap legacy queue), it needs
access mes in atomic context. Use spinlock to protect agaist mes
ring buffer race condition.
Signed-off-by: Jack Xiao <Jack.Xiao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h | 1 +
1 file changed, 1 insertion(+)
(limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h')
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
index 3cec87e023b3..1133c361e7a7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mes.h
@@ -83,6 +83,7 @@ struct amdgpu_mes {
uint64_t default_gang_quantum;
struct amdgpu_ring ring;
+ spinlock_t ring_lock;
const struct firmware *fw[AMDGPU_MAX_MES_PIPES];
--
cgit v1.2.3-70-g09d2