linux-kernel - [PATCH v2 11/21] drm/nouveau: use match

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Date:   Thu, 31 May 2018 19:11:16 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <andy.shevchenko@...il.com>, Yisheng Xie <xieyisheng1@...wei.com>,
        "Ben Skeggs" <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        <dri-devel@...ts.freedesktop.org>, <nouveau@...ts.freedesktop.org>
Subject: [PATCH v2 11/21] drm/nouveau: 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: Ben Skeggs <bskeggs@...hat.com>
Cc: David Airlie <airlied@...ux.ie>
Cc: dri-devel@...ts.freedesktop.org
Cc: nouveau@...ts.freedesktop.org
Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
v2:
 - handle err case before normal case - per Andy

 drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 6d99f11..67ba2ac 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -644,16 +644,13 @@ static int nv17_tv_create_resources(struct drm_encoder *encoder,
 	int i;
 
 	if (nouveau_tv_norm) {
-		for (i = 0; i < num_tv_norms; i++) {
-			if (!strcmp(nv17_tv_norm_names[i], nouveau_tv_norm)) {
-				tv_enc->tv_norm = i;
-				break;
-			}
-		}
-
-		if (i == num_tv_norms)
+		i = match_string(nv17_tv_norm_names,
+				 num_tv_norms, nouveau_tv_norm);
+		if (i < 0)
 			NV_WARN(drm, "Invalid TV norm setting \"%s\"\n",
 				nouveau_tv_norm);
+		else
+			tv_enc->tv_norm = i;
 	}
 
 	drm_mode_create_tv_properties(dev, num_tv_norms, nv17_tv_norm_names);
-- 
1.7.12.4