diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/8250/8250.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 66869522d7e3..bda48d455f4b 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -80,7 +80,16 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */ #define DEBUG_INTR(fmt...) do { } while (0) #endif -#define PASS_LIMIT 512 +/* + * On -rt we can have a more delays, and legitimately + * so - so don't drop work spuriously and spam the + * syslog: + */ +#ifdef CONFIG_PREEMPT_RT_FULL +# define PASS_LIMIT 1000000 +#else +# define PASS_LIMIT 512 +#endif #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) @@ -1586,14 +1595,12 @@ 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); |