diff options
| author | Jiri Slaby <jirislaby@gmail.com> | 2011-06-05 22:51:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-27 20:46:29 -0800 |
| commit | c9d332c77f72e7d9643116e53ae0c1e2bebd3156 (patch) | |
| tree | 80ef347e3003b9e3754d8c189241397260fcbd21 | |
| parent | a6aa749906b92eaec6ca0469f90f35de26044d90 (diff) | |
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 <jirislaby@gmail.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Ram Gupta <ram.gupta5@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index 762ce722758e..7f50999eebc2 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -81,7 +81,7 @@ 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) |