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[24.155.109.49]) by smtp.googlemail.com with ESMTPSA id c1sm457747oic.31.2019.08.22.19.12.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Aug 2019 19:12:28 -0700 (PDT) From: Rob Herring To: dri-devel@lists.freedesktop.org Subject: [PATCH v2 8/8] drm/panfrost: Remove unnecessary flushing from tlb_inv_context Date: Thu, 22 Aug 2019 21:12:16 -0500 Message-Id: <20190823021216.5862-9-robh@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190823021216.5862-1-robh@kernel.org> References: <20190823021216.5862-1-robh@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Maxime Ripard , Tomeu Vizoso , David Airlie , Sean Paul , Steven Price , Boris Brezillon , Alyssa Rosenzweig , Robin Murphy Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" tlb_inv_context() hook is only called when freeing the page tables. There's no point in flushing only to free the page tables immediately following. There is also a problem that we could be accessing the h/w when suspended. Cc: Tomeu Vizoso Cc: Steven Price Cc: Alyssa Rosenzweig Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Rob Herring Reviewed-by: Steven Price --- v2: new patch drivers/gpu/drm/panfrost/panfrost_mmu.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index ccf671a9c3fb..9f85275a896c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -328,11 +328,7 @@ void panfrost_mmu_unmap(struct panfrost_gem_object *bo) } static void mmu_tlb_inv_context_s1(void *cookie) -{ - struct panfrost_file_priv *priv = cookie; - - mmu_hw_do_operation(priv->pfdev, &priv->mmu, 0, ~0UL, AS_COMMAND_FLUSH_MEM); -} +{} static void mmu_tlb_inv_range_nosync(unsigned long iova, size_t size, size_t granule, bool leaf, void *cookie)