linux-kernel - [PATCH v4 8/8] imx-drm: use for_each_endpoint_of_node macro in imx_drm_encoder_parse

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Message-Id: <1411978551-30480-9-git-send-email-p.zabel@pengutronix.de>
Date:	Mon, 29 Sep 2014 10:15:51 +0200
From:	Philipp Zabel <p.zabel@...gutronix.de>
To:	Grant Likely <grant.likely@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	devel@...verdev.osuosl.org,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	kernel@...gutronix.de, Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH v4 8/8] imx-drm: use for_each_endpoint_of_node macro in imx_drm_encoder_parse_of

Using the for_each_... macro should make the code bit shorter and
easier to read. Since we can break out of the loop, we keep the
call to of_node_put after the loop.

Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
---
Changes since v3:
 - Kept of_node_put after the loop, as in the earlier soc_camera patch.
   This reduces the line count and is safe to do since of_node_put(NULL)
   is a no-op.
---
 drivers/staging/imx-drm/imx-drm-core.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
index 69e7194..43285dc 100644
--- a/drivers/staging/imx-drm/imx-drm-core.c
+++ b/drivers/staging/imx-drm/imx-drm-core.c
@@ -439,17 +439,13 @@ int imx_drm_encoder_parse_of(struct drm_device *drm,
 	struct drm_encoder *encoder, struct device_node *np)
 {
 	struct imx_drm_device *imxdrm = drm->dev_private;
-	struct device_node *ep = NULL;
+	struct device_node *ep;
 	uint32_t crtc_mask = 0;
-	int i;
+	int i = 0;
 
-	for (i = 0; ; i++) {
+	for_each_endpoint_of_node(np, ep) {
 		u32 mask;
 
-		ep = of_graph_get_next_endpoint(np, ep);
-		if (!ep)
-			break;
-
 		mask = imx_drm_find_crtc_mask(imxdrm, ep);
 
 		/*
@@ -462,6 +458,7 @@ int imx_drm_encoder_parse_of(struct drm_device *drm,
 			return -EPROBE_DEFER;
 
 		crtc_mask |= mask;
+		i++;
 	}
 
 	of_node_put(ep);
-- 
2.1.0

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