diff options
| author | Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> | 2011-02-23 10:03:18 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-22 17:22:04 -0800 |
| commit | 60d1031e114a3e96e4420421e34ddc0dcd10cbae (patch) | |
| tree | dec57b1c70ea18ba6f1eda148fb206fe59203155 | |
| parent | 9af7155bb03675ba2d4d68428a4345e0511ce8dd (diff) | |
pch_uart: fix exclusive access issue
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/tty/serial/pch_uart.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 0c95051fa0a4..da0ba0fa2b99 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -636,8 +636,7 @@ static void pch_dma_tx_complete(void *arg) priv->tx_dma_use = 0; priv->nent = 0; kfree(priv->sg_tx_p); - if (uart_circ_chars_pending(xmit)) - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_TX_INT); + pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_TX_INT); } static int pop_tx(struct eg20t_port *priv, int size) @@ -793,6 +792,14 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv) return 0; } + if (priv->tx_dma_use) { + dev_dbg(priv->port.dev, "%s:Tx is not completed. (%lu)\n", + __func__, jiffies); + pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_TX_INT); + priv->tx_empty = 1; + return 0; + } + fifo_size = max(priv->fifo_size, 1); tx_empty = 1; if (pop_tx_x(priv, xmit->buf)) { |