linux-kernel - [PATCH 3/6] dmaengine: at_hdmac: no need set ACK in new descriptor

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Date:	Wed, 12 Jan 2011 15:39:07 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	dan.j.williams@...el.com, linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, hong.xu@...el.com,
	Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH 3/6] dmaengine: at_hdmac: no need set ACK in new descriptor

Following descriptor flow in at_hdmac driver, descriptor comming from
atc_desc_get() as already DMA_CTRL_ACK flag set. No need to set it again.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
 drivers/dma/at_hdmac.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index a4dd4bc..4f83431 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -583,7 +583,6 @@ atc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 		desc->lli.ctrlb = ctrlb;
 
 		desc->txd.cookie = 0;
-		async_tx_ack(&desc->txd);
 
 		if (!first) {
 			first = desc;
-- 
1.7.3

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