linux-kernel - [PATCH v1 1/5] ALSA: hda: hda_cs_dsp_ctl: Minor clean and redundant code removal

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Date:   Tue, 11 Oct 2022 15:35:48 +0100
From:   Stefan Binding <sbinding@...nsource.cirrus.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v1 1/5] ALSA: hda: hda_cs_dsp_ctl: 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 hda_cs_dsp_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: Stefan Binding <sbinding@...nsource.cirrus.com>
---
 sound/pci/hda/hda_cs_dsp_ctl.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c
index 89ee549cb7d50..41d3e8fd289d7 100644
--- a/sound/pci/hda/hda_cs_dsp_ctl.c
+++ b/sound/pci/hda/hda_cs_dsp_ctl.c
@@ -199,16 +199,10 @@ EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_remove, SND_HDA_CS_DSP_CONTROLS);
 int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
 			 unsigned int alg, const void *buf, size_t len)
 {
-	struct cs_dsp_coeff_ctl *cs_ctl;
+	struct cs_dsp_coeff_ctl *cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
 	struct hda_cs_dsp_coeff_ctl *ctl;
 	int ret;
 
-	cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
-	if (!cs_ctl)
-		return -EINVAL;
-
-	ctl = cs_ctl->priv;
-
 	ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
 	if (ret)
 		return ret;
@@ -216,6 +210,8 @@ int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
 	if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
 		return 0;
 
+	ctl = cs_ctl->priv;
+
 	snd_ctl_notify(ctl->card, SNDRV_CTL_EVENT_MASK_VALUE, &ctl->kctl->id);
 
 	return 0;
@@ -225,13 +221,8 @@ EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_write_ctl, SND_HDA_CS_DSP_CONTROLS);
 int hda_cs_dsp_read_ctl(struct cs_dsp *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, name, type, alg);
-	if (!cs_ctl)
-		return -EINVAL;
+	return cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(dsp, name, type, alg), 0, buf, len);
 
-	return cs_dsp_coeff_read_ctrl(cs_ctl, 0, buf, len);
 }
 EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_read_ctl, SND_HDA_CS_DSP_CONTROLS);
 
-- 
2.34.1