From: Jiri Slaby Date: Sun, 5 Jun 2011 20:51:49 +0000 (+0200) Subject: serial: 8250, increase PASS_LIMIT X-Git-Tag: v2.6.34.15~95 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=197a5a154c73e0a8cdd5af21c25d0064db32af52;p=thirdparty%2Fkernel%2Fstable.git serial: 8250, increase PASS_LIMIT commit e7328ae1848966181a7ac47e8ae6cddbd2cf55f3 upstream. With virtual machines like qemu, it's pretty common to see "too much work for irq4" messages nowadays. This happens when a bunch of output is printed on the emulated serial console. This is caused by too low PASS_LIMIT. When ISR loops more than the limit, it spits the message. I've been using a kernel with doubled the limit and I couldn't see no problems. Maybe it's time to get rid of the message now? Signed-off-by: Jiri Slaby Cc: Alan Cox Signed-off-by: Greg Kroah-Hartman [PG: drivers/tty/serial/8250.c ---> drivers/serial/8250.c in 2.6.34] Signed-off-by: Paul Gortmaker --- diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index c1d79a2334761..848894773c642 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -82,7 +82,7 @@ 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 256 +#define PASS_LIMIT 512 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)