void dsp_hwec_enable()

in mISDN/dsp_hwec.c [34:90]
47 lines of code
11 McCabe index (conditional complexity)

void dsp_hwec_enable(struct dsp *dsp, const char *arg)
{
	int deftaps = 128,
		len;
	struct mISDN_ctrl_req	cq;

	if (!dsp) {
		printk(KERN_ERR "%s: failed to enable hwec: dsp is NULL\n",
		       __func__);
		return;
	}

	if (!arg)
		goto _do;

	len = strlen(arg);
	if (!len)
		goto _do;

	{
		char *dup, *tok, *name, *val;
		int tmp;

		dup = kstrdup(arg, GFP_ATOMIC);
		if (!dup)
			return;

		while ((tok = strsep(&dup, ","))) {
			if (!strlen(tok))
				continue;
			name = strsep(&tok, "=");
			val = tok;

			if (!val)
				continue;

			if (!strcmp(name, "deftaps")) {
				if (sscanf(val, "%d", &tmp) == 1)
					deftaps = tmp;
			}
		}

		kfree(dup);
	}

_do:
	printk(KERN_DEBUG "%s: enabling hwec with deftaps=%d\n",
	       __func__, deftaps);
	memset(&cq, 0, sizeof(cq));
	cq.op = MISDN_CTRL_HFC_ECHOCAN_ON;
	cq.p1 = deftaps;
	if (!dsp->ch.peer->ctrl(&dsp->ch, CONTROL_CHANNEL, &cq)) {
		printk(KERN_DEBUG "%s: CONTROL_CHANNEL failed\n",
		       __func__);
		return;
	}
}