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Date: Thu, 12 May 2011 11:20:22 +0200 From: Nicolas Ferre <nicolas.ferre@...el.com> To: "Koul, Vinod" <vinod.koul@...el.com> CC: dan.j.williams@...el.com, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] dmaengine: at_hdmac: pause: no need to wait for FIFO empty Le 12/05/2011 10:28, Koul, Vinod : > On Mon, 2011-05-09 at 18:11 +0200, Nicolas Ferre wrote: >> The addition of the pause feature to atc_control an active wait was introduced >> to check the FIFO empty event. This event was not always happening and >> a timout contition was needed. >> But, in some cases, this event depend on the peripheral connected to the >> channel that is paused: FIFO becomes empty if the peripheral consumes data. >> The timeout is pretty difficult to evaluate. Moreover, this check is not >> needed. >> In conclusion, it seems sensible to entirely remove the checking of >> "FIFO empty" status when pausing. >> >> Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com> >> --- >> Vinod, >> >> This additional patch goes on top of your current "next" branch. It is a >> removing of some code added to the pause/resume patch sent earlier and can be >> folded into this one if you want to. >> > Applied with edit in commit msg, Thanks Thanks a lot. Bye, -- Nicolas Ferre -- 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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