Messages in this thread Patch in this message | | | From | Matthew Garrett <> | Subject | [PATCH V3] input: Default to only using PNP for i8042 probing on x86 | Date | Mon, 17 May 2010 17:19:44 -0400 |
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Experimenting with Windows has revealed that it will not probe the keyboard controller unless a valid PNPACPI device is present. Change our behaviour to match - users can override by using the existing i8042.nopnp=1 parameter.
Signed-off-by: Matthew Garrett <mjg@redhat.com> --- drivers/input/serio/i8042-x86ia64io.h | 14 ++++++++++---- 1 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h index 6168469..19d11f3 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -1,6 +1,8 @@ #ifndef _I8042_X86IA64IO_H #define _I8042_X86IA64IO_H +#include <linux/acpi.h> + /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by @@ -744,12 +746,16 @@ static int __init i8042_pnp_init(void) if (!i8042_pnp_kbd_devices && !i8042_pnp_aux_devices) { i8042_pnp_exit(); -#if defined(__ia64__) - return -ENODEV; -#else + + /* Non-ACPI systems are much less likely to have the + * KBC declared via PNP, so if acpi is disabled fall + * back to banging the ports directly */ + + if (!acpi_disabled) + return -ENODEV; + printk(KERN_INFO "PNP: No PS/2 controller found. Probing ports directly.\n"); return 0; -#endif } if (i8042_pnp_kbd_devices) -- 1.7.0.1
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