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Input: i8042 - fix AUX IRQ delivery check

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Input: i8042 - fix AUX IRQ delivery check

On boxes that do not implement AUX LOOP command we can not
verify AUX IRQ delivery and must assume that it is wired
properly.

Cc: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dmitry Torokhov
2007-03-19 09:06:25 -04:00
committed by Greg Kroah-Hartman
parent 8479fc42c9
commit 6f09b7b3b2
1 changed files with 4 additions and 1 deletions
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drivers/input/serio/i8042.c
+4 -1
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@@ -543,6 +543,7 @@ static int __devinit i8042_check_aux(void)
{
int retval = -1;
int irq_registered = 0;
int aux_loop_broken = 0;
unsigned long flags;
unsigned char param;
@@ -572,6 +573,8 @@ static int __devinit i8042_check_aux(void)
if (i8042_command(&param, I8042_CMD_AUX_TEST) ||
(param && param != 0xfa && param != 0xff))
return -1;
aux_loop_broken = 1;
}
/*
@@ -595,7 +598,7 @@ static int __devinit i8042_check_aux(void)
* used it for a PCI card or somethig else.
*/
if (i8042_noloop) {
if (i8042_noloop || aux_loop_broken) {
/*
* Without LOOP command we can't test AUX IRQ delivery. Assume the port
* is working and hope we are right.