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Date: Tue, 26 Apr 2011 21:31:36 +0100 From: Russell King - ARM Linux <linux@....linux.org.uk> To: "Koul, Vinod" <vinod.koul@...el.com> Cc: Viresh Kumar <viresh.kumar@...com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Williams, Dan J" <dan.j.williams@...el.com>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "armando.visconti@...com" <armando.visconti@...com>, "shiraz.hashim@...com" <shiraz.hashim@...com>, "amit.goel@...com" <amit.goel@...com>, "viresh.linux@...il.com" <viresh.linux@...il.com>, "jamie@...ieiles.com" <jamie@...ieiles.com> Subject: Re: [PATCH 2/6] dmaengine/dw_dmac: Enable resubmission from callback routine. On Tue, Apr 19, 2011 at 11:42:24AM +0530, Koul, Vinod wrote: > On 04/18/2011 04:20 PM, viresh kumar wrote: > > > > Resubmission of new transfer must be allowed from callbacks. For this release > > lock before calling callback routine and enable them again. > Why would you like to do that? > > IMO it's not a good thing as you are essentially doing it in your tasklet... > Make sure the submit() is done by client before this and you use it to start > next transaction in you tasklet and let client know in callback txn is > finished. No. Submission is explicitly permitted (by Dan) in slave DMA callbacks. -- 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/
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