linux-kernel - [PATCH] ASoC: wm_adsp: Minor clean and redundant code removal

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Date:   Thu, 30 Jun 2022 11:14:59 +0100
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <lgirdwood@...il.com>, <alsa-devel@...a-project.org>,
        <patches@...nsource.cirrus.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] 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@...nsource.cirrus.com>
---
 sound/soc/codecs/wm_adsp.c | 25 +++++--------------------
 1 file changed, 5 insertions(+), 20 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index a7784ac15dde6..cfaa45ede916a 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/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);
 
-- 
2.30.2