51 lines
1.5 KiB
Diff
51 lines
1.5 KiB
Diff
From 45687878fff664bdf78bbb00621263cd71d06df4 Mon Sep 17 00:00:00 2001
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From: Ingo Molnar <mingo@elte.hu>
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Date: Fri, 3 Jul 2009 08:30:01 -0500
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Subject: [PATCH 213/287] serial: 8250: Call flush_to_ldisc when the irq is
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threaded
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Signed-off-by: Ingo Molnar <mingo@elte.hu>
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---
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drivers/tty/serial/8250.c | 2 ++
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drivers/tty/tty_buffer.c | 4 ++++
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2 files changed, 6 insertions(+)
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diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
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index e6d9dc1..b245819 100644
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--- a/drivers/tty/serial/8250.c
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+++ b/drivers/tty/serial/8250.c
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@@ -1631,12 +1631,14 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
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l = l->next;
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+#ifndef CONFIG_PREEMPT_RT_FULL
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if (l == i->head && pass_counter++ > PASS_LIMIT) {
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/* If we hit this, we're dead. */
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printk_ratelimited(KERN_ERR
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"serial8250: too much work for irq%d\n", irq);
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break;
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}
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+#endif
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} while (l != end);
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spin_unlock(&i->lock);
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diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
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index 6c9b7cd..a56c223 100644
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--- a/drivers/tty/tty_buffer.c
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+++ b/drivers/tty/tty_buffer.c
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@@ -493,10 +493,14 @@ void tty_flip_buffer_push(struct tty_struct *tty)
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tty->buf.tail->commit = tty->buf.tail->used;
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spin_unlock_irqrestore(&tty->buf.lock, flags);
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+#ifndef CONFIG_PREEMPT_RT_FULL
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if (tty->low_latency)
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flush_to_ldisc(&tty->buf.work);
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else
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schedule_work(&tty->buf.work);
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+#else
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+ flush_to_ldisc(&tty->buf.work);
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+#endif
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}
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EXPORT_SYMBOL(tty_flip_buffer_push);
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