From: Viresh Kumar <viresh.kumar@st.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Rajeev KUMAR <rajeev-dlh.kumar@st.com>,
Bhupesh SHARMA <bhupesh.sharma@st.com>,
"linus.walleij@linaro.org" <linus.walleij@linaro.org>,
"perex@perex.cz" <perex@perex.cz>,
Vipin KUMAR <vipin.kumar@st.com>,
Mirko GARDI <mirko.gardi@st.com>,
Vincenzo FRASCINO <Vincenzo.FRASCINO@st.com>,
Pratyush ANAND <pratyush.anand@st.com>,
"vinod.koul@intel.com" <vinod.koul@intel.com>,
Deepak SIKRI <deepak.sikri@st.com>,
"cjb@laptop.org" <cjb@laptop.org>,
"hskinnemoen@gmail.com" <hskinnemoen@gmail.com>,
Bhavna YADAV <bhavna.yadav@st.com>,
Armando VISCONTI <armando.visconti@st.com>,
"egtvedt@samfundet.no" <egtvedt@samfundet.no>,
Shiraz HASHIM <shiraz.hashim@st.com>,
Amit VIRDI <Amit.VIRDI@st.com>,
Vipul Kumar SAMAR <vipulkumar.samar@st.com>,
"dan.j.williams@intel.com" <dan.j.williams@intel.com>,
Ulf HANSSON <ulf.hansson@stericsson.com>,
"linux-arm-kernel@lists.infradead.org" <linux-arm-k>
Subject: Re: [PATCH V3 08/12] dmaengine/dw_dmac: Unmap all memory buffers after completion of non-slave transfers
Date: Mon, 6 Feb 2012 13:41:40 +0530 [thread overview]
Message-ID: <4F2F8B3C.7050107@st.com> (raw)
In-Reply-To: <20120202121523.GG889@n2100.arm.linux.org.uk>
On 2/2/2012 5:45 PM, Russell King - ARM Linux wrote:
> I'm still unconvinced that this is anywhere close to correct.
>
> Look. DMA engines only automatically unmap when they're being used by the
> async_tx stuff for memcpy's, and RAID computation offload, and the like.
> These work with individual single buffers, not scatterlists. These will
> not be fragmented.
Got it. You are right.
@Vinod: Please drop this patch.
--
viresh
WARNING: multiple messages have this Message-ID (diff)
From: viresh.kumar@st.com (Viresh Kumar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V3 08/12] dmaengine/dw_dmac: Unmap all memory buffers after completion of non-slave transfers
Date: Mon, 6 Feb 2012 13:41:40 +0530 [thread overview]
Message-ID: <4F2F8B3C.7050107@st.com> (raw)
In-Reply-To: <20120202121523.GG889@n2100.arm.linux.org.uk>
On 2/2/2012 5:45 PM, Russell King - ARM Linux wrote:
> I'm still unconvinced that this is anywhere close to correct.
>
> Look. DMA engines only automatically unmap when they're being used by the
> async_tx stuff for memcpy's, and RAID computation offload, and the like.
> These work with individual single buffers, not scatterlists. These will
> not be fragmented.
Got it. You are right.
@Vinod: Please drop this patch.
--
viresh
next prev parent reply other threads:[~2012-02-06 8:11 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-01 10:42 [PATCH V3 00/12] dmaengine: Pl08x and dw_dmac updates Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 01/12] dmaengine/dw_dmac: Hibernation support in dw_dmac Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 02/12] dmaengine: Add flow controller information to dma_slave_config Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 03/12] dmaengine: Pass dma_slave_config .device_fc = NULL for all existing users Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 04/12] dmaengine/amba-pl08x: Take flow controller info from DMA_SLAVE_CONFIG Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 05/12] dmaengine/dw_dmac: Don't use magic number for total number of channels Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 06/12] dmaengine/dw_dmac: Use dev_get_platdata() instead of accessing dev directly Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 07/12] dmaengine/dw_dmac: Don't handle block interrupts Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 08/12] dmaengine/dw_dmac: Unmap all memory buffers after completion of non-slave transfers Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-02 12:15 ` Russell King - ARM Linux
2012-02-02 12:15 ` Russell King - ARM Linux
2012-02-06 8:11 ` Viresh Kumar [this message]
2012-02-06 8:11 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 09/12] dmaengine/dw_dmac: Add 64 bit access width support for slave xfers on mem side Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 10/12] dmaengine/dw_dmac: Add support for DMA_SLAVE_CONFIG Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 11/12] dmaengine/dw_dmac: Fix dw_dmac user drivers to adapt to slave_config changes Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` [PATCH V3 12/12] dmaengine/dw_dmac: Remove unused fields in struct dw_dma_slave Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-01 10:42 ` Viresh Kumar
2012-02-22 12:51 ` [PATCH V3 00/12] dmaengine: Pl08x and dw_dmac updates Vinod Koul
2012-02-22 12:51 ` Vinod Koul
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