From: Bich Hemon <bich.hemon@xxxxxx>
Set last_res value in each port
Signed-off-by: Bich Hemon <bich.hemon@xxxxxx>
---
drivers/tty/serial/stm32-usart.c | 6 +++---
drivers/tty/serial/stm32-usart.h | 1 +
2 files changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index a7401b0..c54b89d 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -155,14 +155,13 @@ 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++;
@@ -808,6 +807,7 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
stm32_ports[id].port.line = id;
stm32_ports[id].fifoen = true;
stm32_ports[id].rx_irq = USART_CR1_RXNEIE;
+ stm32_ports[id].last_res = RX_BUF_L;
return &stm32_ports[id];
}
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h
index f9fe15b..056a837 100644
--- a/drivers/tty/serial/stm32-usart.h
+++ b/drivers/tty/serial/stm32-usart.h
@@ -226,6 +226,7 @@ struct stm32_port {
dma_addr_t tx_dma_buf; /* dma tx buffer bus address */
unsigned char *tx_buf; /* dma tx buffer cpu address */
u32 rx_irq; /* USART_CR1_RXNEIE or RTOIE */
+ int last_res;
bool tx_dma_busy; /* dma tx busy */
bool hw_flow_control;
bool fifoen;
--
1.9.1
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