From d3d2dfe2d723051cac323017af5d0180ba8de4c1 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 8 Oct 2009 20:58:13 -0700 Subject: Input: i8042 - print debug data when testing AUX IRQ delivery Sometimes it is not clear why IRQ delivery test failed so let's add some debug printks so we know the exact reason. Signed-off-by: Dmitry Torokhov --- drivers/input/serio/i8042.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/input/serio') diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index bc56e52b945..a31578170cc 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -609,6 +609,8 @@ static irqreturn_t __init i8042_aux_test_irq(int irq, void *dev_id) str = i8042_read_status(); if (str & I8042_STR_OBF) { data = i8042_read_data(); + dbg("%02x <- i8042 (aux_test_irq, %s)", + data, str & I8042_STR_AUXDATA ? "aux" : "kbd"); if (i8042_irq_being_tested && data == 0xa5 && (str & I8042_STR_AUXDATA)) complete(&i8042_aux_irq_delivered); @@ -750,6 +752,7 @@ static int __init i8042_check_aux(void) * AUX IRQ was never delivered so we need to flush the controller to * get rid of the byte we put there; otherwise keyboard may not work. */ + dbg(" -- i8042 (aux irq test timeout)"); i8042_flush(); retval = -1; } -- cgit v1.2.3