[PATCH 22/33] drm/i915: use match_string() helper

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

Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_pipe_crc.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c b/drivers/gpu/drm/i915/intel_pipe_crc.c
index 1f5cd57..f6b1335 100644
--- a/drivers/gpu/drm/i915/intel_pipe_crc.c
+++ b/drivers/gpu/drm/i915/intel_pipe_crc.c
@@ -764,13 +764,12 @@ enum intel_pipe_crc_object {
 {
 	int i;
 
-	for (i = 0; i < ARRAY_SIZE(pipe_crc_objects); i++)
-		if (!strcmp(buf, pipe_crc_objects[i])) {
-			*o = i;
-			return 0;
-		}
+	i = match_string(pipe_crc_objects, ARRAY_SIZE(pipe_crc_objects), buf);
+	if (i < 0)
+		return -EINVAL;
 
-	return -EINVAL;
+	*o = i;
+	return 0;
 }
 
 static int display_crc_ctl_parse_pipe(struct drm_i915_private *dev_priv,
@@ -796,13 +795,12 @@ static int display_crc_ctl_parse_pipe(struct drm_i915_private *dev_priv,
 		return 0;
 	}
 
-	for (i = 0; i < ARRAY_SIZE(pipe_crc_sources); i++)
-		if (!strcmp(buf, pipe_crc_sources[i])) {
-			*s = i;
-			return 0;
-		}
+	i = match_string(pipe_crc_sources, ARRAY_SIZE(pipe_crc_sources), buf);
+	if (i < 0)
+		return -EINVAL;
 
-	return -EINVAL;
+	*s = i;
+	return 0;
 }
 
 static int display_crc_ctl_parse(struct drm_i915_private *dev_priv,
-- 
1.7.12.4

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