Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

2015-04-17 Thread jiwang
Hello Sebastian On 04/13/2015 05:06 PM, Sebastian Andrzej Siewior wrote: On Mon, Apr 13, 2015 at 04:40:15PM +0900, jiwang wrote: Hi Sebastian Hi Jiada, My question is how was this tested. Before your patch none of my boards were using DMA because RTS/CTS is not in use and this was a key

Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

2015-04-17 Thread jiwang
Hello Sebastian On 04/13/2015 05:06 PM, Sebastian Andrzej Siewior wrote: On Mon, Apr 13, 2015 at 04:40:15PM +0900, jiwang wrote: Hi Sebastian Hi Jiada, My question is how was this tested. Before your patch none of my boards were using DMA because RTS/CTS is not in use and this was a key

Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

2015-04-13 Thread jiwang
Hi Sebastian On 04/09/2015 09:00 PM, Sebastian Andrzej Siewior wrote: On 2014-12-09 18:11:32 [+0900], Jiada Wang wrote: From: Anton Bondarenko DMA mode for UART can be used even w/o HW flow control with RTS/CTS. So it need to be initialized and enabled earlier. Signed-off-by: Anton

Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

2015-04-13 Thread jiwang
Hi Sebastian On 04/09/2015 09:00 PM, Sebastian Andrzej Siewior wrote: On 2014-12-09 18:11:32 [+0900], Jiada Wang wrote: From: Anton Bondarenko anton_bondare...@mentor.com DMA mode for UART can be used even w/o HW flow control with RTS/CTS. So it need to be initialized and enabled earlier.

Re: [alsa-devel] unload Audio drivers while playback stream is active case kernel crash

2015-01-14 Thread jiwang
Hi On 01/14/2015 10:43 PM, Fabio Estevam wrote: On Wed, Jan 14, 2015 at 10:57 AM, Lars-Peter Clausen wrote: My personal opinion on this is that disallowing module removal while a driver registered by the module when is in use, while there is no technical reason to do so, is a anti-feature.

Re: [alsa-devel] unload Audio drivers while playback stream is active case kernel crash

2015-01-14 Thread jiwang
Hi On 01/14/2015 05:15 PM, Lars-Peter Clausen wrote: On 01/14/2015 08:43 AM, Takashi Iwai wrote: At Tue, 13 Jan 2015 21:54:12 +, Mark Brown wrote: On Tue, Jan 13, 2015 at 06:24:44PM +0100, Takashi Iwai wrote: Wang, Jiada (ESD) wrote: I am using i.MX6Q sabreSD board, which have

Re: [alsa-devel] unload Audio drivers while playback stream is active case kernel crash

2015-01-14 Thread jiwang
Hi On 01/14/2015 10:43 PM, Fabio Estevam wrote: On Wed, Jan 14, 2015 at 10:57 AM, Lars-Peter Clausen l...@metafoo.de wrote: My personal opinion on this is that disallowing module removal while a driver registered by the module when is in use, while there is no technical reason to do so, is a

Re: [alsa-devel] unload Audio drivers while playback stream is active case kernel crash

2015-01-14 Thread jiwang
Hi On 01/14/2015 05:15 PM, Lars-Peter Clausen wrote: On 01/14/2015 08:43 AM, Takashi Iwai wrote: At Tue, 13 Jan 2015 21:54:12 +, Mark Brown wrote: On Tue, Jan 13, 2015 at 06:24:44PM +0100, Takashi Iwai wrote: Wang, Jiada (ESD) wrote: I am using i.MX6Q sabreSD board, which have