linux-kernel - [PATCH v1 2/2] drm/amdgpu: remove gart_window

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Message-ID: <20250916070846.5107-2-pierre-eric.pelloux-prayer@amd.com>
Date: Tue, 16 Sep 2025 09:08:45 +0200
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
To: Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>, David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>
CC: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
	<amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v1 2/2] drm/amdgpu: remove gart_window_lock usage from gmc v12

This lock was part of the SDMA workaround originally implemented in
gmc_v10_0_flush_gpu_tlb (a70cb2176f7ef6f moved it to
amdgpu_gmc_flush_gpu_tlb).

This means this lock is useless and be safely dropped.

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
index 76d3c40735b0..454fd1104c6d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
@@ -312,9 +312,7 @@ static void gmc_v12_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 		return;
 	}
 
-	mutex_lock(&adev->mman.gtt_window_lock);
 	gmc_v12_0_flush_vm_hub(adev, vmid, vmhub, 0);
-	mutex_unlock(&adev->mman.gtt_window_lock);
 	return;
 }
 
-- 
2.43.0