From f9d36da9cdc2504cd9bb6034cfaba0673ce2d6df Mon Sep 17 00:00:00 2001 From: Graf Yang Date: Thu, 11 Jun 2009 13:42:17 +0100 Subject: [PATCH] Blackfin Serial Driver: fix missing new lines when under load Add a SSYNC() into bfin_serial_dma_tx_chars() to ensure DMA registers are written with new data otherwise we might miss a byte or two when the system is under load. PIO mode is OK though. Signed-off-by: Graf Yang Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu Signed-off-by: Alan Cox Signed-off-by: Linus Torvalds --- drivers/serial/bfin_5xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index dfae22d47bf7..676efdad3712 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -415,6 +415,7 @@ static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart) set_dma_start_addr(uart->tx_dma_channel, (unsigned long)(xmit->buf+xmit->tail)); set_dma_x_count(uart->tx_dma_channel, uart->tx_count); set_dma_x_modify(uart->tx_dma_channel, 1); + SSYNC(); enable_dma(uart->tx_dma_channel); UART_SET_IER(uart, ETBEI); -- 2.20.1