Re: [PATCH] nouveau: fix undefined reference to acpi_lid_open

[Marcin Slusarz <marcin.slusarz@gmail.com>]

On Wed, Feb 17, 2010 at 10:42:43AM +0100, Daniel Mack wrote:
> Fix the following compile time error:
> 
> drivers/built-in.o: In function `nouveau_connector_detect':
> /home/daniel/src/linux/jup/linux-2.6/drivers/gpu/drm/nouveau/nouveau_connector.c:243: undefined reference to `acpi_lid_open'
> 
> Signed-off-by: Daniel Mack <daniel@caiaq.de>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Ben Skeggs <bskeggs@redhat.com>
> Cc: Francisco Jerez <currojerez@riseup.net>
> Cc: Maarten Maathuis <madman2003@gmail.com>
> Cc: Xavier Chantry <shiningxc@gmail.com>
> Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
> Cc: dri-devel@lists.sourceforge.net
> ---
>  drivers/gpu/drm/nouveau/nouveau_connector.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
> index d2f6335..c74d45d 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_connector.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
> @@ -239,7 +239,7 @@ nouveau_connector_detect(struct drm_connector *connector)
>  	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
>  		nv_encoder = find_encoder_by_type(connector, OUTPUT_LVDS);
>  	if (nv_encoder && nv_connector->native_mode) {
> -#ifdef CONFIG_ACPI
> +#ifdef CONFIG_ACPI_BUTTON
>  		if (!nouveau_ignorelid && !acpi_lid_open())
>  			return connector_status_disconnected;
>  #endif
> -- 

You are fixing CONFIG_ACPI_BUTTON=m vs CONFIG_DRM_NOUVEAU=y compilation,
but breaking runtime behaviour of CONFIG_ACPI_BUTTON=m + CONFIG_DRM_NOUVEAU=m.

I think this code should be compiled when:
#if defined(CONFIG_ACPI_BUTTON) || (defined(CONFIG_ACPI_BUTTON_MODULE) && defined(CONFIG_DRM_NOUVEAU_MODULE))

Marcin