For backporting a driver to 3.11 kernel I would like to know how to get
same functionality as ACPI_COMPANION(). I did it like below, but would
like to have some confirmation on it.
Regards,
Arend
--8<------------------------------------------------------------------
static inline
struct acpi_device *_acpi_get_companion(struct device *dev)
{
struct acpi_device *adev;
int ret;
ret = acpi_bus_get_device(ACPI_HANDLE(dev), &adev);
if (ret < 0)
adev = NULL;
return adev;
}
#define ACPI_COMPANION(dev) _acpi_get_companion(dev)
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