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[34.125.3.185]) by smtp.gmail.com with UTF8SMTPSA id 98e67ed59e1d1-32ed26876ffsm492508a91.3.2025.09.16.14.08.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Sep 2025 14:08:40 -0700 (PDT) From: Chia-I Wu To: Boris Brezillon , Steven Price , Liviu Dudau , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Grant Likely , Heiko Stuebner , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 09/10] drm/panthor: move size check to mmu_hw_flush_caches Date: Tue, 16 Sep 2025 14:08:22 -0700 Message-ID: <20250916210823.4033529-10-olvaffe@gmail.com> X-Mailer: git-send-email 2.51.0.384.g4c02a37b29-goog In-Reply-To: <20250916210823.4033529-1-olvaffe@gmail.com> References: <20250916210823.4033529-1-olvaffe@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" We can early return from mmu_hw_flush_caches when size is 0. Signed-off-by: Chia-I Wu --- drivers/gpu/drm/panthor/panthor_mmu.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/pantho= r/panthor_mmu.c index 436a54e30a36d..743e9342eece7 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -570,9 +570,6 @@ static void mmu_hw_cmd_lock(struct panthor_device *ptde= v, u32 as_nr, u64 region_ u64 region; u64 region_end =3D region_start + size; =20 - if (!size) - return; - /* * The locked region is a naturally aligned power of 2 block encoded as * log2 minus(1). @@ -643,7 +640,7 @@ static int mmu_hw_flush_caches(struct panthor_device *p= tdev, int as_nr, u64 iova return -EINVAL; } =20 - if (as_nr < 0) + if (as_nr < 0 || !size) return 0; =20 /* --=20 2.51.0.384.g4c02a37b29-goog