From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754650AbaIHQdb (ORCPT ); Mon, 8 Sep 2014 12:33:31 -0400 Received: from www.linutronix.de ([62.245.132.108]:46113 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754443AbaIHQd2 (ORCPT ); Mon, 8 Sep 2014 12:33:28 -0400 Date: Mon, 8 Sep 2014 18:33:13 +0200 From: Sebastian Andrzej Siewior To: Frans Klaver Cc: linux-serial@vger.kernel.org, tony@atomide.com, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, balbi@ti.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA Message-ID: <20140908163313.GA25724@linutronix.de> References: <1409943773-7874-1-git-send-email-bigeasy@linutronix.de> <20140908144616.GA22315@ci00147.xsens-tech.local> <20140908151501.GA22584@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20140908151501.GA22584@linutronix.de> X-Key-Id: 97C4700B X-Key-Fingerprint: 09E2 D1F3 9A3A FF13 C3D3 961C 0688 1C1E 97C4 700B User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Sebastian Andrzej Siewior | 2014-09-08 17:15:01 [+0200]: >* Frans Klaver | 2014-09-08 16:46:18 [+0200]: > >>- ncurses based applications (vi, less) don't play nice for me on the >> console with this series. less doesn't show me anything. vi doesn't >> return to console properly. > >Can you give a test case Okay. less. My am335x-evm freezes after a while for no obvious reason. The data that hits the RX fifo is still received but the TX won't do anything. The DMA request is pending, the FIFO level is @64 bytes and the UART doesn't make any progress. On beagle-board I see what you described: less on a file and nothing happens. Disabling DMA seems to help fix the problem omap3. Nothing changes for am335x. Sebastian