linux-kernel - [PATCH v2 15/21] ALSA: oxygen: use match

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Message-ID: <1527765086-19873-16-git-send-email-xieyisheng1@huawei.com>
Date:   Thu, 31 May 2018 19:11:20 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <andy.shevchenko@...il.com>, Yisheng Xie <xieyisheng1@...wei.com>,
        "Clemens Ladisch" <clemens@...isch.de>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, <alsa-devel@...a-project.org>
Subject: [PATCH v2 15/21] ALSA: oxygen: use match_string() helper

match_string() returns the index of an array for a matching string,
which can be used instead of open coded variant.

Cc: Clemens Ladisch <clemens@...isch.de>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.com>
Cc: alsa-devel@...a-project.org
Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
v2:
 - do not change the type of i - per Andy

 sound/pci/oxygen/oxygen_mixer.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index 4ca1266..81af21a 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -1052,10 +1052,10 @@ static int add_controls(struct oxygen *chip,
 		[CONTROL_CD_CAPTURE_SWITCH] = "CD Capture Switch",
 		[CONTROL_AUX_CAPTURE_SWITCH] = "Aux Capture Switch",
 	};
-	unsigned int i, j;
+	unsigned int i;
 	struct snd_kcontrol_new template;
 	struct snd_kcontrol *ctl;
-	int err;
+	int j, err;
 
 	for (i = 0; i < count; ++i) {
 		template = controls[i];
@@ -1086,11 +1086,11 @@ static int add_controls(struct oxygen *chip,
 		err = snd_ctl_add(chip->card, ctl);
 		if (err < 0)
 			return err;
-		for (j = 0; j < CONTROL_COUNT; ++j)
-			if (!strcmp(ctl->id.name, known_ctl_names[j])) {
-				chip->controls[j] = ctl;
-				ctl->private_free = oxygen_any_ctl_free;
-			}
+		j = match_string(known_ctl_names, CONTROL_COUNT, ctl->id.name);
+		if (j >= 0) {
+			chip->controls[j] = ctl;
+			ctl->private_free = oxygen_any_ctl_free;
+		}
 	}
 	return 0;
 }
-- 
1.7.12.4