linux-kernel - [PATCH v2] ALSA: hda/ca0132

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Date:   Thu, 12 Oct 2017 22:36:31 -0400
From:   Jérémy Lefaure 
        <jeremy.lefaure@....epita.fr>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     Jérémy Lefaure 
        <jeremy.lefaure@....epita.fr>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] ALSA: hda/ca0132 - use ARRAY_SIZE

Using the ARRAY_SIZE macro improves the readability of the code.

Found with Coccinelle with the following semantic patch:
@r depends on (org || report)@
type T;
T[] E;
position p;
@@
(
 (sizeof(E)@p /sizeof(*E))
|
 (sizeof(E)@p /sizeof(E[...]))
|
 (sizeof(E)@p /sizeof(T))
)

Signed-off-by: Jérémy Lefaure <jeremy.lefaure@....epita.fr>
---
Changes since v1:
- keep sound/oss untouched

 sound/pci/hda/patch_ca0132.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index 3e73d5c6ccfc..768ea8651993 100644
--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -27,6 +27,7 @@
 #include <linux/mutex.h>
 #include <linux/module.h>
 #include <linux/firmware.h>
+#include <linux/kernel.h>
 #include <sound/core.h>
 #include "hda_codec.h"
 #include "hda_local.h"
@@ -3605,8 +3606,7 @@ static int ca0132_vnode_switch_set(struct snd_kcontrol *kcontrol,
 static int ca0132_voicefx_info(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_info *uinfo)
 {
-	unsigned int items = sizeof(ca0132_voicefx_presets)
-				/ sizeof(struct ct_voicefx_preset);
+	unsigned int items = ARRAY_SIZE(ca0132_voicefx_presets);
 
 	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 	uinfo->count = 1;
@@ -3635,10 +3635,8 @@ static int ca0132_voicefx_put(struct snd_kcontrol *kcontrol,
 	struct ca0132_spec *spec = codec->spec;
 	int i, err = 0;
 	int sel = ucontrol->value.enumerated.item[0];
-	unsigned int items = sizeof(ca0132_voicefx_presets)
-				/ sizeof(struct ct_voicefx_preset);
 
-	if (sel >= items)
+	if (sel >= ARRAY_SIZE(ca0132_voicefx_presets))
 		return 0;
 
 	codec_dbg(codec, "ca0132_voicefx_put: sel=%d, preset=%s\n",
-- 
2.14.2