From: nicolas.ferre@atmel.com (Nicolas Ferre)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] dmaengine: at_hdmac: fix buffer transfer size specification
Date: Mon, 13 Dec 2010 13:48:41 +0100 [thread overview]
Message-ID: <1292244521-20756-1-git-send-email-nicolas.ferre@atmel.com> (raw)
Buffer transfer size is the number of transfers to be performed in
relation with the width of the _source_ interface.
So in the DMA_FROM_DEVICE case, it should be the register width that
should be taken into account.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
---
drivers/dma/at_hdmac.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index a0f3e6a..ea0ee81 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -722,7 +722,7 @@ atc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
desc->lli.daddr = mem;
desc->lli.ctrla = ctrla
| ATC_DST_WIDTH(mem_width)
- | len >> mem_width;
+ | len >> reg_width;
desc->lli.ctrlb = ctrlb;
if (!first) {
--
1.7.3
next reply other threads:[~2010-12-13 12:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 12:48 Nicolas Ferre [this message]
2010-12-14 8:44 ` [PATCH] dmaengine: at_hdmac: fix buffer transfer size specification Dan Williams
2010-12-14 12:05 ` Jean-Christophe PLAGNIOL-VILLARD
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