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| author | Gerald Baeza <gerald.baeza@st.com> | 2017-07-13 18:08:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-30 17:32:25 +0300 |
| commit | e57079159619c21d7b33916ba5a4e74259a9fce7 (patch) | |
| tree | 53aa9250237afef889c3df6442752b20e7e293bb /drivers/tty/serial/stm32-usart.c | |
| parent | 3e5fcbacee5c2524499f203c31db46eefa744437 (diff) | |
| download | linux-e57079159619c21d7b33916ba5a4e74259a9fce7.tar.xz | |
serial: stm32: fix multi-ports management
Correct management of multi-ports. Each port has
its own last residue value and its own alias.
Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Bich Hemon <bich.hemon@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index ebc49e4ff0e2..a12d79cfe607 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -111,14 +111,13 @@ static void stm32_receive_chars(struct uart_port *port, bool threaded) unsigned long c; u32 sr; char flag; - static int last_res = RX_BUF_L; if (port->irq_wake) pm_wakeup_event(tport->tty->dev, 0); - while (stm32_pending_rx(port, &sr, &last_res, threaded)) { + while (stm32_pending_rx(port, &sr, &stm32_port->last_res, threaded)) { sr |= USART_SR_DUMMY_RX; - c = stm32_get_char(port, &sr, &last_res); + c = stm32_get_char(port, &sr, &stm32_port->last_res); flag = TTY_NORMAL; port->icount.rx++; @@ -694,8 +693,10 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev) return NULL; id = of_alias_get_id(np, "serial"); - if (id < 0) - id = 0; + if (id < 0) { + dev_err(&pdev->dev, "failed to get alias id, errno %d\n", id); + return NULL; + } if (WARN_ON(id >= STM32_MAX_PORTS)) return NULL; @@ -703,6 +704,7 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev) stm32_ports[id].hw_flow_control = of_property_read_bool(np, "st,hw-flow-ctrl"); stm32_ports[id].port.line = id; + stm32_ports[id].last_res = RX_BUF_L; return &stm32_ports[id]; } |