From 3ca5de6dd4ec5a139b2b8f00dce3e4726ca91af1 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 7 Mar 2007 23:20:55 -0500 Subject: [PATCH] Input: i8042 - another attempt to fix AUX delivery checks Do not assume that AUX_LOOP command is broken unless it completes successfully but returns wrong (unexpected) data. Signed-off-by: Dmitry Torokhov --- drivers/input/serio/i8042.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c index ec195a36e8f..db9cca3b65e 100644 --- a/drivers/input/serio/i8042.c +++ b/drivers/input/serio/i8042.c @@ -553,7 +553,8 @@ static int __devinit i8042_check_aux(void) */ param = 0x5a; - if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0x5a) { + retval = i8042_command(¶m, I8042_CMD_AUX_LOOP); + if (retval || param != 0x5a) { /* * External connection test - filters out AT-soldered PS/2 i8042's @@ -567,7 +568,12 @@ static int __devinit i8042_check_aux(void) (param && param != 0xfa && param != 0xff)) return -1; - aux_loop_broken = 1; +/* + * If AUX_LOOP completed without error but returned unexpected data + * mark it as broken + */ + if (!retval) + aux_loop_broken = 1; } /* -- 2.41.1