diff options
| author | Graf Yang <graf.yang@analog.com> | 2009-06-11 12:42:17 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-11 15:51:04 (GMT) |
| commit | f9d36da9cdc2504cd9bb6034cfaba0673ce2d6df (patch) | |
| tree | 36789122ce363636792d90b809b3bdff20e39876 | |
| parent | 7de7c55bf54dede2bd2262349fc7b558bcc8e413 (diff) | |
| download | linux-f9d36da9cdc2504cd9bb6034cfaba0673ce2d6df.tar.xz | |
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 <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/serial/bfin_5xx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index dfae22d..676efda 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); |