From: vinod.koul@intel.com (Vinod Koul)
To: linux-arm-kernel@lists.infradead.org
Subject: Tearing down DMA transfer setup after DMA client has finished
Date: Wed, 7 Dec 2016 22:13:41 +0530 [thread overview]
Message-ID: <20161207164341.GX6408@localhost> (raw)
In-Reply-To: <yw1xwpfd2o9f.fsf@unicorn.mansr.com>
On Tue, Dec 06, 2016 at 01:14:20PM +0000, M?ns Rullg?rd wrote:
>
> That's not going to work very well. Device drivers typically request
> dma channels in their probe functions or when the device is opened.
> This means that reserving one of the few channels there will inevitably
> make some other device fail to operate.
No that doesnt make sense at all, you should get a channel only when you
want to use it and not in probe!
--
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vinod.koul@intel.com>
To: "Måns Rullgård" <mans@mansr.com>
Cc: Mason <slash.tmp@free.fr>, Russell King <linux@arm.linux.org.uk>,
dmaengine@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
Dan Williams <dan.j.williams@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Jon Mason <jdmason@kudzu.us>, Mark Brown <broonie@kernel.org>,
Lars-Peter Clausen <lars@metafoo.de>,
Lee Jones <lee.jones@linaro.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Arnd Bergmann <arnd@arndb.de>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Dave Jiang <dave.jiang@intel.com>,
Peter Ujfalusi <peter.ujfalusi@ti.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Sebastian Frias <sf84@laposte.net>,
Thibaud Cornic <thibaud_cornic@sigmadesigns.com>
Subject: Re: Tearing down DMA transfer setup after DMA client has finished
Date: Wed, 7 Dec 2016 22:13:41 +0530 [thread overview]
Message-ID: <20161207164341.GX6408@localhost> (raw)
In-Reply-To: <yw1xwpfd2o9f.fsf@unicorn.mansr.com>
On Tue, Dec 06, 2016 at 01:14:20PM +0000, Måns Rullgård wrote:
>
> That's not going to work very well. Device drivers typically request
> dma channels in their probe functions or when the device is opened.
> This means that reserving one of the few channels there will inevitably
> make some other device fail to operate.
No that doesnt make sense at all, you should get a channel only when you
want to use it and not in probe!
--
~Vinod
next prev parent reply other threads:[~2016-12-07 16:43 UTC|newest]
Thread overview: 164+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-23 10:25 Tearing down DMA transfer setup after DMA client has finished Mason
2016-11-23 10:25 ` Mason
2016-11-23 12:13 ` Måns Rullgård
2016-11-23 12:13 ` Måns Rullgård
2016-11-23 12:41 ` Mason
2016-11-23 12:41 ` Mason
2016-11-23 17:21 ` Måns Rullgård
2016-11-23 17:21 ` Måns Rullgård
2016-11-24 10:53 ` Mason
2016-11-24 10:53 ` Mason
2016-11-24 14:17 ` Måns Rullgård
2016-11-24 14:17 ` Måns Rullgård
2016-11-24 15:20 ` Mason
2016-11-24 15:20 ` Mason
2016-11-24 16:37 ` Måns Rullgård
2016-11-24 16:37 ` Måns Rullgård
2016-11-25 4:55 ` Vinod Koul
2016-11-25 4:55 ` Vinod Koul
2016-11-25 11:57 ` Måns Rullgård
2016-11-25 11:57 ` Måns Rullgård
2016-11-25 14:05 ` Mason
2016-11-25 14:05 ` Mason
2016-11-25 14:12 ` Måns Rullgård
2016-11-25 14:12 ` Måns Rullgård
2016-11-25 14:28 ` Mason
2016-11-25 14:28 ` Mason
2016-11-25 14:42 ` Måns Rullgård
2016-11-25 14:42 ` Måns Rullgård
2016-11-25 12:45 ` Russell King - ARM Linux
2016-11-25 12:45 ` Russell King - ARM Linux
2016-11-25 13:07 ` Måns Rullgård
2016-11-25 13:07 ` Måns Rullgård
2016-11-25 13:34 ` Russell King - ARM Linux
2016-11-25 13:34 ` Russell King - ARM Linux
2016-11-25 13:50 ` Måns Rullgård
2016-11-25 13:50 ` Måns Rullgård
2016-11-25 13:58 ` Russell King - ARM Linux
2016-11-25 13:58 ` Russell King - ARM Linux
2016-11-25 14:03 ` Måns Rullgård
2016-11-25 14:03 ` Måns Rullgård
2016-11-25 14:17 ` Russell King - ARM Linux
2016-11-25 14:17 ` Russell King - ARM Linux
2016-11-25 14:40 ` Måns Rullgård
2016-11-25 14:40 ` Måns Rullgård
2016-11-25 14:56 ` Russell King - ARM Linux
2016-11-25 14:56 ` Russell King - ARM Linux
2016-11-25 15:08 ` Måns Rullgård
2016-11-25 15:08 ` Måns Rullgård
2016-11-25 15:02 ` Mason
2016-11-25 15:02 ` Mason
2016-11-25 15:12 ` Måns Rullgård
2016-11-25 15:12 ` Måns Rullgård
2016-11-25 15:21 ` Mason
2016-11-25 15:21 ` Mason
2016-11-25 15:28 ` Måns Rullgård
2016-11-25 15:28 ` Måns Rullgård
2016-11-25 12:46 ` Mason
2016-11-25 12:46 ` Mason
2016-11-25 13:11 ` Måns Rullgård
2016-11-25 13:11 ` Måns Rullgård
2016-11-25 14:21 ` Mason
2016-11-25 14:21 ` Mason
2016-11-25 14:37 ` Måns Rullgård
2016-11-25 14:37 ` Måns Rullgård
2016-11-25 15:35 ` Mason
2016-11-25 15:35 ` Mason
2016-11-29 18:25 ` Mason
2016-11-29 18:25 ` Mason
2016-12-06 5:12 ` Vinod Koul
2016-12-06 5:12 ` Vinod Koul
2016-12-06 12:42 ` Mason
2016-12-06 12:42 ` Mason
2016-12-06 13:14 ` Måns Rullgård
2016-12-06 13:14 ` Måns Rullgård
2016-12-06 15:24 ` Mason
2016-12-06 15:24 ` Mason
2016-12-06 15:34 ` Måns Rullgård
2016-12-06 15:34 ` Måns Rullgård
2016-12-06 22:55 ` Mason
2016-12-06 22:55 ` Mason
2016-12-07 16:43 ` Vinod Koul [this message]
2016-12-07 16:43 ` Vinod Koul
2016-12-07 16:45 ` Måns Rullgård
2016-12-07 16:45 ` Måns Rullgård
2016-12-08 10:39 ` Vinod Koul
2016-12-08 10:39 ` Vinod Koul
2016-12-08 10:54 ` Mason
2016-12-08 10:54 ` Mason
2016-12-08 11:18 ` Geert Uytterhoeven
2016-12-08 11:18 ` Geert Uytterhoeven
2016-12-08 11:47 ` Måns Rullgård
2016-12-08 11:47 ` Måns Rullgård
2016-12-08 12:03 ` Geert Uytterhoeven
2016-12-08 12:03 ` Geert Uytterhoeven
2016-12-08 12:17 ` Mason
2016-12-08 12:17 ` Mason
2016-12-08 12:21 ` Måns Rullgård
2016-12-08 12:21 ` Måns Rullgård
2016-12-08 16:37 ` Vinod Koul
2016-12-08 16:37 ` Vinod Koul
2016-12-08 16:48 ` Måns Rullgård
2016-12-08 16:48 ` Måns Rullgård
2016-12-09 6:59 ` Vinod Koul
2016-12-09 6:59 ` Vinod Koul
2016-12-09 10:25 ` Sebastian Frias
2016-12-09 10:25 ` Sebastian Frias
2016-12-09 11:34 ` Måns Rullgård
2016-12-09 11:34 ` Måns Rullgård
2016-12-09 11:35 ` 1Måns Rullgård
2016-12-09 11:35 ` 1Måns Rullgård
2016-12-09 17:17 ` Vinod Koul
2016-12-09 17:17 ` Vinod Koul
2016-12-09 17:28 ` Måns Rullgård
2016-12-09 17:28 ` Måns Rullgård
2016-12-09 17:53 ` Vinod Koul
2016-12-09 17:53 ` Vinod Koul
2016-12-09 17:34 ` Mason
2016-12-09 17:34 ` Mason
2016-12-09 17:56 ` Vinod Koul
2016-12-09 17:56 ` Vinod Koul
2016-12-09 18:17 ` Vinod Koul
2016-12-09 18:17 ` Vinod Koul
2016-12-09 18:23 ` Mason
2016-12-09 18:23 ` Mason
2016-12-12 5:01 ` Vinod Koul
2016-12-12 5:01 ` Vinod Koul
2016-12-15 11:17 ` Mark Brown
2016-12-15 11:17 ` Mark Brown
2016-12-08 11:44 ` Måns Rullgård
2016-12-08 11:44 ` Måns Rullgård
2016-12-08 11:59 ` Geert Uytterhoeven
2016-12-08 11:59 ` Geert Uytterhoeven
2016-12-08 12:20 ` Måns Rullgård
2016-12-08 12:20 ` Måns Rullgård
2016-12-08 12:31 ` Geert Uytterhoeven
2016-12-08 12:31 ` Geert Uytterhoeven
2016-12-08 12:41 ` Mason
2016-12-08 12:41 ` Mason
2016-12-08 12:44 ` Måns Rullgård
2016-12-08 12:44 ` Måns Rullgård
2016-12-08 13:29 ` Mason
2016-12-08 13:29 ` Mason
2016-12-08 13:39 ` Måns Rullgård
2016-12-08 13:39 ` Måns Rullgård
2016-12-08 15:50 ` Vinod Koul
2016-12-08 15:50 ` Vinod Koul
2016-12-08 16:36 ` Måns Rullgård
2016-12-08 16:36 ` Måns Rullgård
2016-12-08 15:40 ` Vinod Koul
2016-12-08 15:40 ` Vinod Koul
2016-12-08 15:43 ` Mason
2016-12-08 15:43 ` Mason
2016-12-08 16:21 ` Vinod Koul
2016-12-08 16:21 ` Vinod Koul
2016-12-08 16:46 ` Måns Rullgård
2016-12-08 16:46 ` Måns Rullgård
2016-12-07 16:41 ` Vinod Koul
2016-12-07 16:41 ` Vinod Koul
2016-12-07 16:44 ` Måns Rullgård
2016-12-07 16:44 ` Måns Rullgård
2016-12-08 10:37 ` Vinod Koul
2016-12-08 10:37 ` Vinod Koul
2016-12-08 11:44 ` Måns Rullgård
2016-12-08 11:44 ` Måns Rullgård
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