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drm/layerscape: reduce excessive stack usage

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The fsl-dcu driver copies a drm_mode_config object to its
stack but then only accesses a single member (dpms_property)
once. The data structure is large enough to trigger a warning
about the amount of kernel stack being used:

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c: In function 'fsl_dcu_drm_connector_create':
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c:182:1: error: the frame size of 1040 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

This changes the fsl_dcu_drm_connector_create() function to
only access the drm_mode_config by reference, which is also
more efficient.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 109eee2f2a ("drm/layerscape: Add Freescale DCU DRM driver")
Signed-off-by: Stefan Agner <stefan@agner.ch>
This commit is contained in:
Arnd Bergmann 2016-02-22 22:33:31 +01:00 committed by Stefan Agner
parent fb127b7943
commit a5dab99139
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c
View file

@ -142,7 +142,7 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
struct drm_encoder *encoder)
{
struct drm_connector *connector = &fsl_dev->connector.base;
struct drm_mode_config mode_config = fsl_dev->drm->mode_config;
struct drm_mode_config *mode_config = &fsl_dev->drm->mode_config;
struct device_node *panel_node;
int ret;
@ -164,7 +164,7 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
goto err_sysfs;
drm_object_property_set_value(&connector->base,
mode_config.dpms_property,
mode_config->dpms_property,
DRM_MODE_DPMS_OFF);
panel_node = of_parse_phandle(fsl_dev->np, "fsl,panel", 0);