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-rw-r--r--arch/mn10300/kernel/mn10300-serial.c35
1 files changed, 23 insertions, 12 deletions
diff --git a/arch/mn10300/kernel/mn10300-serial.c b/arch/mn10300/kernel/mn10300-serial.c
index b7b5a4c270f5..81d5cb9b6569 100644
--- a/arch/mn10300/kernel/mn10300-serial.c
+++ b/arch/mn10300/kernel/mn10300-serial.c
@@ -1374,7 +1374,8 @@ timer_okay:
if ((new->c_cflag & CREAD) == 0)
port->uart.ignore_status_mask |= (1 << TTY_NORMAL);
- scxctr |= *port->_control & (SC01CTR_TXE | SC01CTR_RXE | SC01CTR_BKE);
+ scxctr |= SC01CTR_TXE | SC01CTR_RXE;
+ scxctr |= *port->_control & SC01CTR_BKE;
*port->_control = scxctr;
spin_unlock_irqrestore(&port->uart.lock, flags);
@@ -1720,19 +1721,29 @@ static int mn10300_serial_poll_get_char(struct uart_port *_port)
_enter("%s", port->name);
- do {
- /* pull chars out of the hat */
- ix = ACCESS_ONCE(port->rx_outp);
- if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0)
- return NO_POLL_CHAR;
+ if (mn10300_serial_int_tbl[port->rx_irq].port != NULL) {
+ do {
+ /* pull chars out of the hat */
+ ix = ACCESS_ONCE(port->rx_outp);
+ if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0)
+ return NO_POLL_CHAR;
- smp_read_barrier_depends();
- ch = port->rx_buffer[ix++];
- st = port->rx_buffer[ix++];
- smp_mb();
- port->rx_outp = ix & (MNSC_BUFFER_SIZE - 1);
+ smp_read_barrier_depends();
+ ch = port->rx_buffer[ix++];
+ st = port->rx_buffer[ix++];
+ smp_mb();
+ port->rx_outp = ix & (MNSC_BUFFER_SIZE - 1);
- } while (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF));
+ } while (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF));
+ } else {
+ do {
+ st = *port->_status;
+ if (st & (SC01STR_FEF | SC01STR_PEF | SC01STR_OEF))
+ continue;
+ } while (!(st & SC01STR_RBF));
+
+ ch = *port->_rxb;
+ }
return ch;
}