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| author |   Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> | 2014-11-06 09:23:00 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 15:00:44 -0800 |
| commit | bd737f8738b7e15930aa7b47c94c28a8d83148ac (patch) | |
| tree | 9140a208d4856074a92ffc6543aabcf08a38a762 /drivers/tty/serial/atmel_serial.c | |
| parent | serial_core: Remove call to driver-specific TIO[GS]RS485] (diff) | |
| download | linux-dev-bd737f8738b7e15930aa7b47c94c28a8d83148ac.tar.xz linux-dev-bd737f8738b7e15930aa7b47c94c28a8d83148ac.zip | |
tty/serial_core: Introduce lock mechanism for RS485
Introduce an homogeneous lock system between setting and using the rs485
data of the uart_port.
This patch should not be split into multiple ones in order to avoid
leaving the tree in an unstable state.
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Suggested-by: Alan Cox <alan@linux.intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/atmel_serial.c')
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 80c4bfcff3fa..2cb04137ae78 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -294,9 +294,6 @@ static int atmel_config_rs485(struct uart_port *port, { struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); unsigned int mode; - unsigned long flags; - - spin_lock_irqsave(&port->lock, flags); /* Disable interrupts */ UART_PUT_IDR(port, atmel_port->tx_done_mask); @@ -327,8 +324,6 @@ static int atmel_config_rs485(struct uart_port *port, /* Enable interrupts */ UART_PUT_IER(port, atmel_port->tx_done_mask); - spin_unlock_irqrestore(&port->lock, flags); - return 0; } @@ -2533,6 +2528,7 @@ static int atmel_serial_probe(struct platform_device *pdev) struct atmel_uart_data *pdata = dev_get_platdata(&pdev->dev); void *data; int ret = -ENODEV; + bool rs485_enabled; BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1)); @@ -2580,6 +2576,8 @@ static int atmel_serial_probe(struct platform_device *pdev) port->rx_ring.buf = data; } + rs485_enabled = port->uart.rs485.flags & SER_RS485_ENABLED; + ret = uart_add_one_port(&atmel_uart, &port->uart); if (ret) goto err_add_port; @@ -2598,7 +2596,7 @@ static int atmel_serial_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, 1); platform_set_drvdata(pdev, port); - if (port->uart.rs485.flags & SER_RS485_ENABLED) { + if (rs485_enabled) { UART_PUT_MR(&port->uart, ATMEL_US_USMODE_NORMAL); UART_PUT_CR(&port->uart, ATMEL_US_RTSEN); } |