linux-kernel - [PATCH 07/10] drm/panthor: remove unnecessary mmu_hw_wait

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Message-ID: <20250916210823.4033529-8-olvaffe@gmail.com>
Date: Tue, 16 Sep 2025 14:08:20 -0700
From: Chia-I Wu <olvaffe@...il.com>
To: Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Grant Likely <grant.likely@...aro.org>,
	Heiko Stuebner <heiko@...ech.de>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 07/10] drm/panthor: remove unnecessary mmu_hw_wait_ready calls

No need to call mmu_hw_wait_ready after panthor_gpu_flush_caches or
before returning from mmu_hw_flush_caches.

Signed-off-by: Chia-I Wu <olvaffe@...il.com>
---
 drivers/gpu/drm/panthor/panthor_mmu.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/panthor/panthor_mmu.c
index 373871aeea9f4..c223e3fadf92e 100644
--- a/drivers/gpu/drm/panthor/panthor_mmu.c
+++ b/drivers/gpu/drm/panthor/panthor_mmu.c
@@ -669,12 +669,9 @@ static int mmu_hw_flush_caches(struct panthor_device *ptdev, int as_nr, u64 iova
 	 * at the end of the GPU_CONTROL cache flush command, unlike
 	 * AS_COMMAND_FLUSH_MEM or AS_COMMAND_FLUSH_PT.
 	 */
-	ret = mmu_hw_wait_ready(ptdev, as_nr);
-	if (!ret)
-		mmu_hw_cmd_unlock(ptdev, as_nr);
+	mmu_hw_cmd_unlock(ptdev, as_nr);
 
-	/* Wait for the unlock command to complete */
-	return mmu_hw_wait_ready(ptdev, as_nr);
+	return 0;
 }
 
 static int mmu_hw_do_operation(struct panthor_vm *vm,
-- 
2.51.0.384.g4c02a37b29-goog