Openwrt/target/linux/pxa/patches-2.6.21/023-bugfix-serial-interrupt.patch
Gabor Juhos 7085e5331e refresh 2.6.21 patches
SVN-Revision: 14454
2009-02-08 19:36:13 +00:00

24 lines
733 B
Diff

--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -235,15 +235,19 @@ static inline irqreturn_t serial_pxa_irq
struct uart_pxa_port *up = dev_id;
unsigned int iir, lsr;
+ serial_out(up, UART_MCR, serial_in(up, UART_MCR) & ~UART_MCR_RTS); // Clear RTS
iir = serial_in(up, UART_IIR);
if (iir & UART_IIR_NO_INT)
- return IRQ_NONE;
+ {
+ //printk(KERN_WARNING "serial_pxa_irq: odd -- interrupt triggered, but no interrupt in IIR: %08x\n",iir);
+ }
lsr = serial_in(up, UART_LSR);
if (lsr & UART_LSR_DR)
receive_chars(up, &lsr);
check_modem_status(up);
if (lsr & UART_LSR_THRE)
transmit_chars(up);
+ serial_out(up, UART_MCR, serial_in(up, UART_MCR) | UART_MCR_RTS); // Assert RTS
return IRQ_HANDLED;
}