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authorJiri Slaby <jslaby@suse.cz>2014-04-01 15:37:00 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-04-17 01:20:34 +0400
commitf4f653e9875e573860e783fecbebde284a8626f5 (patch)
treef46732411e9c4c47ab33ae185c6f00a7d3349c1d /drivers/tty
parent3053075cea4e1d385cf0b003ffeb860cc8b378fb (diff)
downloadlinux-f4f653e9875e573860e783fecbebde284a8626f5.tar.xz
serial: 8250, disable "too much work" messages
The 8250 driver now reports many of these: serial8250: too much work for irq4 These messages turned out to be common these days with a use of virtualization. I tried to increase the limit of processed characters in commit e7328ae1848966181a7ac47e8ae6cddbd2cf55f3 (serial: 8250, increase PASS_LIMIT) in 2011. It was raised from 256 to 512, but it is still not enough, apparently. So disable the warning unless somebody turns on DEBUG (or DYNAMIC_DEBUG _and_ the message). Signed-off-by: Jiri Slaby <jslaby@suse.cz> Reported-by: Martin Pluskal <mpluskal@suse.com> Reported-by: Takashi Iwai <tiwai@suse.com> Tested-by: Takashi Iwai <tiwai@suse.de> References: https://bugzilla.novell.com/show_bug.cgi?id=868394 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_core.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index 81f909c2101f..139ab1997e06 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -1601,8 +1601,7 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
l = l->next;
if (l == i->head && pass_counter++ > PASS_LIMIT) {
- /* If we hit this, we're dead. */
- printk_ratelimited(KERN_ERR
+ pr_debug_ratelimited(
"serial8250: too much work for irq%d\n", irq);
break;
}