ASoC: wm_adsp: Minor clean and redundant code removal

The cs_dsp core will return an error if passed a NULL cs_dsp struct so
there is no need for the wm_adsp_write|read_ctl functions to manually
check that. The cs_dsp core will also check the data is within bounds of
the control so the additional bounds check is redundant too. Simplify
things a bit by removing said code.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220630101459.3442327-1-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -675,21 +675,12 @@ static void wm_adsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl)
 int wm_adsp_write_ctl(struct wm_adsp *dsp, const char *name, int type,
 		      unsigned int alg, void *buf, size_t len)
 {
-	struct cs_dsp_coeff_ctl *cs_ctl;
+	struct cs_dsp_coeff_ctl *cs_ctl = cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg);
 	struct wm_coeff_ctl *ctl;
 	struct snd_kcontrol *kcontrol;
 	char ctl_name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
 	int ret;
 
-	cs_ctl = cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg);
-	if (!cs_ctl)
-		return -EINVAL;
-
-	ctl = cs_ctl->priv;
-
-	if (len > cs_ctl->len)
-		return -EINVAL;
-
 	ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
 	if (ret)
 		return ret;
@@ -697,6 +688,8 @@ int wm_adsp_write_ctl(struct wm_adsp *dsp, const char *name, int type,
 	if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
 		return 0;
 
+	ctl = cs_ctl->priv;
+
 	if (dsp->component->name_prefix)
 		snprintf(ctl_name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN, "%s %s",
 			 dsp->component->name_prefix, ctl->name);
@@ -720,16 +713,8 @@ EXPORT_SYMBOL_GPL(wm_adsp_write_ctl);
 int wm_adsp_read_ctl(struct wm_adsp *dsp, const char *name, int type,
 		     unsigned int alg, void *buf, size_t len)
 {
-	struct cs_dsp_coeff_ctl *cs_ctl;
-
-	cs_ctl = cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg);
-	if (!cs_ctl)
-		return -EINVAL;
-
-	if (len > cs_ctl->len)
-		return -EINVAL;
-
-	return cs_dsp_coeff_read_ctrl(cs_ctl, 0, buf, len);
+	return cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg),
+				      0, buf, len);
 }
 EXPORT_SYMBOL_GPL(wm_adsp_read_ctl);