From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754042AbbIHXrm (ORCPT ); Tue, 8 Sep 2015 19:47:42 -0400 Received: from mailout2.w1.samsung.com ([210.118.77.12]:22441 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752264AbbIHXri (ORCPT ); Tue, 8 Sep 2015 19:47:38 -0400 X-AuditID: cbfec7f4-f79c56d0000012ee-0a-55ef7396899f Subject: Re: [PATCH 0/3] serial: samsung: Fix UART status handling and other fixes To: Robert Baldyga , gregkh@linuxfoundation.org References: <1441705127-24125-1-git-send-email-r.baldyga@samsung.com> Cc: jslaby@suse.com, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, m.szyprowski@samsung.com From: Krzysztof Kozlowski Message-id: <55EF7395.2000702@samsung.com> Date: Wed, 09 Sep 2015 08:47:33 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-version: 1.0 In-reply-to: <1441705127-24125-1-git-send-email-r.baldyga@samsung.com> Content-type: text/plain; charset=windows-1252 Content-transfer-encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrPLMWRmVeSWpSXmKPExsVy+t/xK7rTit+HGsxbZ2bRvHg9m8WUDR+Y LF6/MLS4vGsOm8WZxb3sFmuP3GW3eHB4J7sDu8f+uWvYPfq2rGL0WL/lKovH501yASxRXDYp qTmZZalF+nYJXBmTHnsX7GKtOP7Vq4FxDUsXIyeHhICJxM9fZ1khbDGJC/fWs3UxcnEICSxl lHi14QobSEJI4AujxMujlSC2sECIxJR1Z9hBbBEBN4lF/+4C1XAA1bhKNC5KAgkzC2RLfGxe BjafTcBYYvPyJWBjeAW0JM4dWMYIUs4ioCrxqDEbJCwqECFx6uxbqBJBiR+T74G1cgJNv7t3 C1g5s4CexP2LWhDT5SU2r3nLPIFRYBaSjlkIVbOQVC1gZF7FKJpamlxQnJSea6hXnJhbXJqX rpecn7uJERLMX3YwLj5mdYhRgINRiYdXw+NdqBBrYllxZe4hRgkOZiUR3r3i70OFeFMSK6tS i/Lji0pzUosPMUpzsCiJ887d9T5ESCA9sSQ1OzW1ILUIJsvEwSnVwLjg+zudXNULPpVq/BFu 3W+PX1d9drNShvvXvkUKn57aiM1L2NB+JGB3LKe9Kpua44qHkwOqMxw7BfTPcc4W6fltXcJe tz1nXtvp+XxbjHQP7Wh0nKKbmOMhXfv6dMD8sE9MqlGPp9wzdj5/2r3/6/wHLF/da1wVZdON 0v+wVmt0hc6R/5jqq8RSnJFoqMVcVJwIAKBn/B1iAgAA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08.09.2015 18:38, Robert Baldyga wrote: > Hello, > > This patch set contains three patches: two minor fixes and one quite > important bugfix enabling UART status handling in DMA mode, which was > missing so far. It enables, among others, 'break' contition handling, > which is necessary if we want to use Magic SysRq. So this patch fixes > Magic SysRq handling for serial consoles using UART in DMA mode, Is it even worth using UART for serial console in DMA mode? How many benefits it brings? Anyone measured real data? The patch which enabled DMA for all serial ports on Exynos4 uncovered some issues. That is one benefit... but was it worth it? Best regards, Krzysztof