| From 94914526a5cb589406b542c90e416c4f6eba1abd Mon Sep 17 00:00:00 2001 |
| From: Ingo Molnar <mingo@elte.hu> |
| Date: Fri, 3 Jul 2009 08:30:01 -0500 |
| Subject: [PATCH 193/274] serial: 8250: Call flush_to_ldisc when the irq is |
| threaded |
| |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| --- |
| drivers/tty/serial/8250/8250.c | 2 ++ |
| drivers/tty/tty_buffer.c | 4 ++++ |
| 2 files changed, 6 insertions(+) |
| |
| diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c |
| index 6ede5a7..ff93c70 100644 |
| --- a/drivers/tty/serial/8250/8250.c |
| +++ b/drivers/tty/serial/8250/8250.c |
| @@ -1584,12 +1584,14 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id) |
| |
| l = l->next; |
| |
| +#ifndef CONFIG_PREEMPT_RT_FULL |
| if (l == i->head && pass_counter++ > PASS_LIMIT) { |
| /* If we hit this, we're dead. */ |
| printk_ratelimited(KERN_ERR |
| "serial8250: too much work for irq%d\n", irq); |
| break; |
| } |
| +#endif |
| } while (l != end); |
| |
| spin_unlock(&i->lock); |
| diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c |
| index 6c9b7cd..a56c223 100644 |
| --- a/drivers/tty/tty_buffer.c |
| +++ b/drivers/tty/tty_buffer.c |
| @@ -493,10 +493,14 @@ void tty_flip_buffer_push(struct tty_struct *tty) |
| tty->buf.tail->commit = tty->buf.tail->used; |
| spin_unlock_irqrestore(&tty->buf.lock, flags); |
| |
| +#ifndef CONFIG_PREEMPT_RT_FULL |
| if (tty->low_latency) |
| flush_to_ldisc(&tty->buf.work); |
| else |
| schedule_work(&tty->buf.work); |
| +#else |
| + flush_to_ldisc(&tty->buf.work); |
| +#endif |
| } |
| EXPORT_SYMBOL(tty_flip_buffer_push); |
| |
| -- |
| 1.7.10.4 |
| |