From 27504be5c10bdc61761ec0126b3645428598ad91 Mon Sep 17 00:00:00 2001 From: Tomoya MORINAGA Date: Tue, 6 Sep 2011 17:16:34 +0900 Subject: [PATCH] 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 Signed-off-by: Grant Likely --- drivers/spi/spi-topcliff-pch.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 1d23f3831866..7a98caa3aed2 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -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);