static ssize_t pdcs_osdep2_write()

in pdc_stable.c [883:919]

• 27 lines of code
• 10 McCabe index (conditional complexity)

static ssize_t pdcs_osdep2_write(struct kobject *kobj,
				 struct kobj_attribute *attr,
				 const char *buf, size_t count)
{
	unsigned long size;
	unsigned short i;
	u8 in[4];

	if (!capable(CAP_SYS_ADMIN))
		return -EACCES;

	if (!buf || !count)
		return -EINVAL;

	if (unlikely(pdcs_size <= 224))
		return -ENOSYS;

	if (unlikely(pdcs_osid != OS_ID_LINUX))
		return -EPERM;

	size = pdcs_size - 224;

	if (count > size)
		return -EMSGSIZE;

	/* We'll use a local copy of buf */

	for (i=0; i<count; i+=4) {
		memset(in, 0, 4);
		memcpy(in, buf+i, (count-i < 4) ? count-i : 4);
		if (unlikely(pdc_stable_write(PDCS_ADDR_OSD2 + i, &in,
					sizeof(in)) != PDC_OK))
			return -EIO;
	}

	return count;
}