From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCH 11/13] arm: dts: dra7: add DMA properties for UART Date: Wed, 05 Nov 2014 09:11:35 +0100 Message-ID: <5459DBB7.1090702@linutronix.de> References: <1412014009-13315-1-git-send-email-bigeasy@linutronix.de> <1412014009-13315-12-git-send-email-bigeasy@linutronix.de> <20141104170233.GB24112@csclub.uwaterloo.ca> <5459079D.7080703@linutronix.de> <20141104172117.GC24112@csclub.uwaterloo.ca> <20141104183315.GD24112@csclub.uwaterloo.ca> <20141104210315.GF24112@csclub.uwaterloo.ca> <20141105011506.GG24112@csclub.uwaterloo.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20141105011506.GG24112-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Lennart Sorensen Cc: linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org, balbi-l0cyMroinI0@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On 11/05/2014 02:15 AM, Lennart Sorensen wrote: > Well 4 hours running with multiple reboots (our testsuite reboots every > 30 minutes to test the watchdog). So far it has only lost 70 bytes out > of 40MB of data sent between uart7 and uart8 (and we are pretty sure > the serial test has a small bug that causes a few bytes to be lost right > after a reboot sometimes). > > The reason I am even trying the new driver today is that we were seeing > soft lockups on the CPU whenever the serial ports were being tested, > usually in less than 5 minutes, so 4 hours without a lockup is a good > sign. No idea what might be wrong with the old omap serial driver, but > it seems something is (unless of course we managed to break it somehow > when we tried to solve its habit of dropping characters). Okay. No DMA but the basic part seems to work for you. Thanks for testing. Sebastian -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html