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[media] V4L: soc_camera_platform: add helper functions to manage device instances

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Add helper inline functions to correctly manage dynamic allocation and
freeing of platform devices. This avoids the ugly code to nullify
device objects.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2011-03-23 04:14:43 -03:00 committed by Mauro Carvalho Chehab
parent e0df5417ac
commit ec0c8d555a
1 changed files with 50 additions and 0 deletions
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50
include/media/soc_camera_platform.h
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@ -25,4 +25,54 @@ struct soc_camera_platform_info {
int (*set_capture)(struct soc_camera_platform_info *info, int enable);
};
static inline void soc_camera_platform_release(struct platform_device **pdev)
{
*pdev = NULL;
}
static inline int soc_camera_platform_add(const struct soc_camera_link *icl,
struct device *dev,
struct platform_device **pdev,
struct soc_camera_link *plink,
void (*release)(struct device *dev),
int id)
{
struct soc_camera_platform_info *info = plink->priv;
int ret;
if (icl != plink)
return -ENODEV;
if (*pdev)
return -EBUSY;
*pdev = platform_device_alloc("soc_camera_platform", id);
if (!*pdev)
return -ENOMEM;
info->dev = dev;
(*pdev)->dev.platform_data = info;
(*pdev)->dev.release = release;
ret = platform_device_add(*pdev);
if (ret < 0) {
platform_device_put(*pdev);
*pdev = NULL;
info->dev = NULL;
}
return ret;
}
static inline void soc_camera_platform_del(const struct soc_camera_link *icl,
struct platform_device *pdev,
const struct soc_camera_link *plink)
{
if (icl != plink || !pdev)
return;
platform_device_unregister(pdev);
}
#endif /* __SOC_CAMERA_H__ */