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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-27 21:40:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-27 21:40:39 -0700 |
| commit | f379a071091b7ff0a7742ac5e02527897aeb8da4 (patch) | |
| tree | 7bc3c1b980db45f1c8a36cf2faf5423aeed7e173 /drivers/tty/serial/8250 | |
| parent | d952795d8193c5a7a8eabdc14fab48777fdcd7c8 (diff) | |
| parent | d1db0eea852497762cab43b905b879dfcd3b8987 (diff) | |
| download | blackbird-op-linux-f379a071091b7ff0a7742ac5e02527897aeb8da4.tar.gz blackbird-op-linux-f379a071091b7ff0a7742ac5e02527897aeb8da4.zip | |
Merge 3.15-rc3 into tty-next
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_core.c | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 9 |
2 files changed, 8 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index ffee9825fbac..111ee8acb07e 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1520,7 +1520,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir) status = serial8250_rx_chars(up, status); } serial8250_modem_status(up); - if (status & UART_LSR_THRE) + if (!up->dma && (status & UART_LSR_THRE)) serial8250_tx_chars(up); spin_unlock_irqrestore(&port->lock, flags); diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index 7046769608d4..ab9096dc3849 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -20,12 +20,15 @@ static void __dma_tx_complete(void *param) struct uart_8250_port *p = param; struct uart_8250_dma *dma = p->dma; struct circ_buf *xmit = &p->port.state->xmit; - - dma->tx_running = 0; + unsigned long flags; dma_sync_single_for_cpu(dma->txchan->device->dev, dma->tx_addr, UART_XMIT_SIZE, DMA_TO_DEVICE); + spin_lock_irqsave(&p->port.lock, flags); + + dma->tx_running = 0; + xmit->tail += dma->tx_size; xmit->tail &= UART_XMIT_SIZE - 1; p->port.icount.tx += dma->tx_size; @@ -35,6 +38,8 @@ static void __dma_tx_complete(void *param) if (!uart_circ_empty(xmit) && !uart_tx_stopped(&p->port)) serial8250_tx_dma(p); + + spin_unlock_irqrestore(&p->port.lock, flags); } static void __dma_rx_complete(void *param) |
