From: Paul Mundt <lethal@linux-sh.org>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: linux-sh@vger.kernel.org, linux-mmc@vger.kernel.org,
Simon Horman <horms@verge.net.au>,
Magnus Damm <damm@opensource.se>, Ian Molton <ian@mnementh.co.uk>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vinod.koul@intel.com>
Subject: Re: [PATCH 0/3] Make DMA slave ID 0 invalid to simplify platform data
Date: Wed, 25 May 2011 11:32:17 +0900 [thread overview]
Message-ID: <20110525023217.GF14329@linux-sh.org> (raw)
In-Reply-To: <Pine.LNX.4.64.1105241147010.31628@axis700.grange>
On Tue, May 24, 2011 at 12:23:55PM +0200, Guennadi Liakhovetski wrote:
> Currently platforms, using the SDHI TMIO driver, have to specify negative
> DMA slave IDs to force PIO mode. If default 0 is left, the driver
> recognises it as a valid DMA slave ID and tries to acquire channels. This
> fails then, because the driver cannot allocate two channels with the same
> ID, but it would be better to just make 0 an invalid ID to prevent this.
>
I suppose the ordering for this will be adding the invalid IDs for all of
the CPUs first and then updating the SDHI driver accordingly during -rc2
or something like that.
WARNING: multiple messages have this Message-ID (diff)
From: Paul Mundt <lethal@linux-sh.org>
To: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: linux-sh@vger.kernel.org, linux-mmc@vger.kernel.org,
Simon Horman <horms@verge.net.au>,
Magnus Damm <damm@opensource.se>, Ian Molton <ian@mnementh.co.uk>,
Dan Williams <dan.j.williams@intel.com>,
Vinod Koul <vinod.koul@intel.com>
Subject: Re: [PATCH 0/3] Make DMA slave ID 0 invalid to simplify platform data
Date: Wed, 25 May 2011 02:32:17 +0000 [thread overview]
Message-ID: <20110525023217.GF14329@linux-sh.org> (raw)
In-Reply-To: <Pine.LNX.4.64.1105241147010.31628@axis700.grange>
On Tue, May 24, 2011 at 12:23:55PM +0200, Guennadi Liakhovetski wrote:
> Currently platforms, using the SDHI TMIO driver, have to specify negative
> DMA slave IDs to force PIO mode. If default 0 is left, the driver
> recognises it as a valid DMA slave ID and tries to acquire channels. This
> fails then, because the driver cannot allocate two channels with the same
> ID, but it would be better to just make 0 an invalid ID to prevent this.
>
I suppose the ordering for this will be adding the invalid IDs for all of
the CPUs first and then updating the SDHI driver accordingly during -rc2
or something like that.
next prev parent reply other threads:[~2011-05-25 2:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 10:23 [PATCH 0/3] Make DMA slave ID 0 invalid to simplify platform data Guennadi Liakhovetski
2011-05-24 10:23 ` Guennadi Liakhovetski
2011-05-24 10:23 ` [PATCH 1/3] sh: mark DMA slave ID 0 as invalid Guennadi Liakhovetski
2011-05-24 10:23 ` Guennadi Liakhovetski
2011-05-24 10:24 ` [PATCH 2/3] ARM: mach-shmobile: " Guennadi Liakhovetski
2011-05-24 10:24 ` Guennadi Liakhovetski
2011-05-24 10:24 ` [PATCH 3/3] mmc: SDHI: DMA slave ID 0 is invalid Guennadi Liakhovetski
2011-05-24 10:24 ` Guennadi Liakhovetski
2011-06-20 14:52 ` Guennadi Liakhovetski
2011-06-20 14:52 ` Guennadi Liakhovetski
2011-06-20 19:37 ` Chris Ball
2011-06-20 19:37 ` Chris Ball
2011-05-25 2:32 ` Paul Mundt [this message]
2011-05-25 2:32 ` [PATCH 0/3] Make DMA slave ID 0 invalid to simplify platform data Paul Mundt
2011-05-25 6:48 ` Guennadi Liakhovetski
2011-05-25 6:48 ` [PATCH 0/3] Make DMA slave ID 0 invalid to simplify platform Guennadi Liakhovetski
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