linux-kernel - Re: [PATCH V2 7/7] dmaengine/dw_dmac: implement pause and resume in dwc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4DAD516F.50901@st.com>
Date:	Tue, 19 Apr 2011 14:40:07 +0530
From:	viresh kumar <viresh.kumar@...com>
To:	Jamie Iles <jamie@...ieiles.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"dan.j.williams@...el.com" <dan.j.williams@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Armando VISCONTI <armando.visconti@...com>,
	Shiraz HASHIM <shiraz.hashim@...com>,
	amitgoel <amit.goel@...com>,
	"viresh.linux@...il.com" <viresh.linux@...il.com>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>
Subject: Re: [PATCH V2 7/7] dmaengine/dw_dmac: implement pause and resume
 in dwc_control

On 04/19/2011 02:25 PM, Jamie Iles wrote:
>>From the Synopsys datasheet it looks to me like pausing by clearing the 
> channel enable bit could cause data to be lost.  I think you need to set 
> the CH_SUSP bit and wait for the FIFO_EMPTY flag to go high then disable 
> the channel.

Yes, Previously i looked at some other doc of dwc and couldn't find this info.
But now found it in datasheet. Will correct and resend it.

-- 
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/