mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-10 22:25:01 +02:00
6544569ed8
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22557 3c298f89-4303-0410-b956-a3cf2f4a3e73
40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
--- a/drivers/serial/8250.c
|
|
+++ b/drivers/serial/8250.c
|
|
@@ -1743,6 +1743,7 @@ static void serial8250_backup_timeout(un
|
|
unsigned int iir, ier = 0, lsr;
|
|
unsigned long flags;
|
|
|
|
+ spin_lock_irqsave(&up->port.lock, flags);
|
|
/*
|
|
* Must disable interrupts or else we risk racing with the interrupt
|
|
* based handler.
|
|
@@ -1760,10 +1761,8 @@ static void serial8250_backup_timeout(un
|
|
* the "Diva" UART used on the management processor on many HP
|
|
* ia64 and parisc boxes.
|
|
*/
|
|
- spin_lock_irqsave(&up->port.lock, flags);
|
|
lsr = serial_in(up, UART_LSR);
|
|
up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
|
|
- spin_unlock_irqrestore(&up->port.lock, flags);
|
|
if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) &&
|
|
(!uart_circ_empty(&up->port.info->xmit) || up->port.x_char) &&
|
|
(lsr & UART_LSR_THRE)) {
|
|
@@ -1771,12 +1770,14 @@ static void serial8250_backup_timeout(un
|
|
iir |= UART_IIR_THRI;
|
|
}
|
|
|
|
- if (!(iir & UART_IIR_NO_INT))
|
|
- serial8250_handle_port(up);
|
|
-
|
|
if (is_real_interrupt(up->port.irq))
|
|
serial_out(up, UART_IER, ier);
|
|
|
|
+ spin_unlock_irqrestore(&up->port.lock, flags);
|
|
+
|
|
+ if (!(iir & UART_IIR_NO_INT))
|
|
+ serial8250_handle_port(up);
|
|
+
|
|
/* Standard timer interval plus 0.2s to keep the port running */
|
|
mod_timer(&up->timer,
|
|
jiffies + poll_timeout(up->port.timeout) + HZ / 5);
|