linux-kernel - [PATCH 1/2] dw_dmac: fill len field of the descriptor

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Message-Id: <1358758844-24711-1-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Mon, 21 Jan 2013 11:00:43 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Viresh Kumar <viresh.linux@...il.com>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org, spear-devel <spear-devel@...t.st.com>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 1/2] dw_dmac: fill len field of the descriptor

It will be useful to have the length of the transfer in the descriptor. The
cyclic transfer functions remained untouched.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/dma/dw_dmac.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 3ff9ef7..d1b9ba2 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -754,6 +754,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
 			first = desc;
 		} else {
 			prev->lli.llp = desc->txd.phys;
+			desc->len = xfer_count << src_width;
 			list_add_tail(&desc->desc_node,
 					&first->tx_list);
 		}
@@ -852,6 +853,7 @@ slave_sg_todev_fill_desc:
 				first = desc;
 			} else {
 				prev->lli.llp = desc->txd.phys;
+				desc->len = dlen;
 				list_add_tail(&desc->desc_node,
 						&first->tx_list);
 			}
@@ -910,6 +912,7 @@ slave_sg_fromdev_fill_desc:
 				first = desc;
 			} else {
 				prev->lli.llp = desc->txd.phys;
+				desc->len = dlen;
 				list_add_tail(&desc->desc_node,
 						&first->tx_list);
 			}
-- 
1.7.10.4

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