Commit 27504be5 authored Sep 06, 2011 by Tomoya MORINAGA Committed by Grant Likely Oct 04, 2011

spi-topcliff-pch: add tx-memory clear after complete transmitting



Currently, in case of reading date from SPI flash,
command is sent twice.
The cause is that tx-memory clear processing is missing .
This patch adds the tx-momory clear processing.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

parent 387719c2

drivers/spi/spi-topcliff-pch.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -837,6 +837,11 @@ static void pch_spi_start_transfer(struct pch_spi_data *data)

		dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent,
		DMA_FROM_DEVICE);

		dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent,
		DMA_FROM_DEVICE);
		memset(data->dma.tx_buf_virt, 0, PAGE_SIZE);

		async_tx_ack(dma->desc_rx);
		async_tx_ack(dma->desc_tx);
		kfree(dma->sg_tx_p);