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Index: linux-2.6.21.7/drivers/serial/pxa.c
===================================================================
--- linux-2.6.21.7.orig/drivers/serial/pxa.c
+++ linux-2.6.21.7/drivers/serial/pxa.c
@@ -57,6 +57,8 @@ struct uart_pxa_port {
unsigned int lsr_break_flag;
unsigned int cken;
char *name;
+ unsigned int msr;
+ unsigned int lsr;
};
static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
@@ -159,6 +161,7 @@ static inline void receive_chars(struct
ignore_char:
*status = serial_in(up, UART_LSR);
+ up->lsr = *status;
} while ((*status & UART_LSR_DR) && (max_count-- > 0));
tty_flip_buffer_push(tty);
}
@@ -211,7 +214,7 @@ static inline void check_modem_status(st
int status;
status = serial_in(up, UART_MSR);
-
+ up->msr = status;
if ((status & UART_MSR_ANY_DELTA) == 0)
return;
@@ -242,6 +245,7 @@ static inline irqreturn_t serial_pxa_irq
//printk(KERN_WARNING "serial_pxa_irq: odd -- interrupt triggered, but no interrupt in IIR: %08x\n",iir);
}
lsr = serial_in(up, UART_LSR);
+ up->lsr = lsr;
if (lsr & UART_LSR_DR)
receive_chars(up, &lsr);
check_modem_status(up);
@@ -258,7 +262,7 @@ static unsigned int serial_pxa_tx_empty(
unsigned int ret;
spin_lock_irqsave(&up->port.lock, flags);
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+ ret = up->lsr & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
spin_unlock_irqrestore(&up->port.lock, flags);
return ret;
@@ -270,7 +274,7 @@ static unsigned int serial_pxa_get_mctrl
unsigned char status;
unsigned int ret;
- status = serial_in(up, UART_MSR);
+ status = up->msr;
ret = 0;
if (status & UART_MSR_DCD)
@@ -400,10 +404,10 @@ static int serial_pxa_startup(struct uar
/*
* And clear the interrupt registers again for luck.
*/
- (void) serial_in(up, UART_LSR);
+ up->lsr = serial_in(up, UART_LSR);
(void) serial_in(up, UART_RX);
(void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
+ up->msr = serial_in(up, UART_MSR);
return 0;
}
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