linux-kernel - [PATCH] drm/panel: fy07024di26a30d: Make use of the helper function dev_err

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Message-ID: <20210916104232.11164-1-caihuoqing@baidu.com>
Date:   Thu, 16 Sep 2021 18:42:32 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Jagan Teki <jagan@...rulasolutions.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/panel: fy07024di26a30d: Make use of the helper function dev_err_probe()

When possible use dev_err_probe help to properly deal with the
PROBE_DEFER error, the benefit is that DEFER issue will be logged
in the devices_deferred debugfs file.
And using dev_err_probe() can reduce code size, and the error value
gets printed.

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 .../drm/panel/panel-feiyang-fy07024di26a30d.c | 21 ++++++++-----------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
index 581661b506f8..acb439fbe59b 100644
--- a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
+++ b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
@@ -200,22 +200,19 @@ static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
 		       DRM_MODE_CONNECTOR_DSI);
 
 	ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
-	if (IS_ERR(ctx->dvdd)) {
-		dev_err(&dsi->dev, "Couldn't get dvdd regulator\n");
-		return PTR_ERR(ctx->dvdd);
-	}
+	if (IS_ERR(ctx->dvdd))
+		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->dvdd),
+				     "Couldn't get dvdd regulator\n");
 
 	ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
-	if (IS_ERR(ctx->avdd)) {
-		dev_err(&dsi->dev, "Couldn't get avdd regulator\n");
-		return PTR_ERR(ctx->avdd);
-	}
+	if (IS_ERR(ctx->avdd))
+		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->avdd),
+				     "Couldn't get avdd regulator\n");
 
 	ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(ctx->reset)) {
-		dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
-		return PTR_ERR(ctx->reset);
-	}
+	if (IS_ERR(ctx->reset))
+		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
+				     "Couldn't get our reset GPIO\n");
 
 	ret = drm_panel_of_backlight(&ctx->panel);
 	if (ret)
-- 
2.25.1