diff options
| author |   Jon Hunter <jonathanh@nvidia.com> | 2015-10-09 14:50:01 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-17 21:07:57 -0700 |
| commit | b0e066ccb5b2c474385fe10dbb385bde10738177 (patch) | |
| tree | ac3c175ec68feb9e27cee335fde6161a14491b9d /drivers/tty | |
| parent | serial: tegra: Remove unnecessary return statements (diff) | |
| download | linux-dev-b0e066ccb5b2c474385fe10dbb385bde10738177.tar.xz linux-dev-b0e066ccb5b2c474385fe10dbb385bde10738177.zip | |
serial: tegra: Remove redundant code and check in tegra_uart_stop_rx()
The serial-tegra driver always uses DMA and hence the driver always
allocates DMA channels. Therefore, the test to see if the RX DMA channel
is initialised in tegra_uart_stop_rx() is unnecessary and so remove
the test and the code that corresponds to the case where the RX DMA
channel is not initialised. Please note that the call to
tegra_uart_stop_rx() should always be before the call to
tegra_uart_shutdown() which will uninitialise the RX DMA channel.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/serial-tegra.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index 42583484d4b2..11aa5e1e3705 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -777,16 +777,13 @@ static void tegra_uart_stop_rx(struct uart_port *u) tup->ier_shadow = ier; tegra_uart_write(tup, ier, UART_IER); tup->rx_in_progress = 0; - if (tup->rx_dma_chan) { - dmaengine_terminate_all(tup->rx_dma_chan); - dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state); - async_tx_ack(tup->rx_dma_desc); - count = tup->rx_bytes_requested - state.residue; - tegra_uart_copy_rx_to_tty(tup, port, count); - tegra_uart_handle_rx_pio(tup, port); - } else { - tegra_uart_handle_rx_pio(tup, port); - } + dmaengine_terminate_all(tup->rx_dma_chan); + dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state); + async_tx_ack(tup->rx_dma_desc); + count = tup->rx_bytes_requested - state.residue; + tegra_uart_copy_rx_to_tty(tup, port, count); + tegra_uart_handle_rx_pio(tup, port); + if (tty) { tty_flip_buffer_push(port); tty_kref_put(tty); |