From: Andrew.Jackson@arm.com (Andrew Jackson)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/5] serial: pl011: Set length of DMA transfer
Date: Fri, 07 Nov 2014 14:14:43 +0000 [thread overview]
Message-ID: <545CD3D3.9000608@arm.com> (raw)
The DMA engines on some systems require that the dma_length is set
when using scatter gather lists.
Signed-off-by: Andrew Jackson <Andrew.Jackson@arm.com>
---
drivers/tty/serial/amba-pl011.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index d8d067a..7c5e263 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -246,6 +246,7 @@ static int pl011_sgbuf_init(struct dma_chan *chan, struct pl011_sgbuf *sg,
sg_set_page(&sg->sg, phys_to_page(dma_addr),
PL011_DMA_BUFFER_SIZE, offset_in_page(dma_addr));
sg_dma_address(&sg->sg) = dma_addr;
+ sg_dma_len(&sg->sg) = PL011_DMA_BUFFER_SIZE;
return 0;
}
--
1.7.1
reply other threads:[~2014-11-07 14:14 UTC|newest]
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