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