From mboxrd@z Thu Jan 1 00:00:00 1970 From: shawnguo@kernel.org (Shawn Guo) Date: Thu, 16 Jun 2016 09:02:09 +0800 Subject: [PATCH 1/1] ARM: dts: imx6qdl.dtsi: add "arm, shared-override" for pl310 In-Reply-To: <1465292365-26038-1-git-send-email-peter.chen@nxp.com> References: <1465292365-26038-1-git-send-email-peter.chen@nxp.com> Message-ID: <20160616010209.GL20243@tiger> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jun 07, 2016 at 05:39:25PM +0800, Peter Chen wrote: > The imx6 SMP system has the same DMA memory coherency issue [1] with > pl310 L2 controller. With this shared override bit set, the customer > reports the DMA coherency issue is gone. Besides, I have tested > the performance using USB ethernet with/without this bit, it shows > no difference. > > [1] http://patchwork.ozlabs.org/patch/469362/ > > Signed-off-by: Peter Chen Applied, thanks.