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[92.176.231.205]) by smtp.gmail.com with ESMTPSA id m3-20020a056000180300b003141e9e2f81sm14564718wrh.4.2023.07.05.01.38.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Jul 2023 01:38:36 -0700 (PDT) From: Javier Martinez Canillas To: Thomas Zimmermann , maarten.lankhorst@linux.intel.com, mripard@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann , Inki Dae , Seung-Woo Kim , Kyungmin Park , Krzysztof Kozlowski , Alim Akhtar Subject: Re: [PATCH 05/10] drm/exynos: Use fbdev DMA helpers In-Reply-To: <20230704160133.20261-6-tzimmermann@suse.de> References: <20230704160133.20261-1-tzimmermann@suse.de> <20230704160133.20261-6-tzimmermann@suse.de> Date: Wed, 05 Jul 2023 10:38:35 +0200 Message-ID: <87ttuirbw4.fsf@minerva.mail-host-address-is-not-set> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Thomas Zimmermann writes: > Use fbdev's DMA helpers for fbdev emulation. They drivers previously s/They/The > used the I/O-memory helpers, while allocating DMA-able system memory. > This could (in theory) result in bus errors from accessing the memory > range. > > This bug has been present since the exynos driver was first added. > > Signed-off-by: Thomas Zimmermann > Fixes: 1c248b7d2960 ("DRM: add DRM Driver for Samsung SoC EXYNOS4210.") Wonder the value of this "Fixes:" tag since this patch depends on the DMA helpers introduced in 1/10? I would just drop it, since it might confuse the different kernel stable scripts that attempt to backport by looking at this tag. As you said, it has been present from the beginning of this driver. Reviewed-by: Javier Martinez Canillas -- Best regards, Javier Martinez Canillas Core Platforms Red Hat