linux-kernel - [PATCH] drm/panel: ls037v7dw01: Make use of the helper function dev_err

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Message-ID: <20210916104612.11516-1-caihuoqing@baidu.com>
Date:   Thu, 16 Sep 2021 18:46:11 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     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: ls037v7dw01: 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, the error value
gets printed.

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 .../gpu/drm/panel/panel-sharp-ls037v7dw01.c   | 21 ++++++++-----------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c b/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c
index 94992f45113a..a07d0f6c3e69 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls037v7dw01.c
@@ -146,22 +146,19 @@ static int ls037v7dw01_probe(struct platform_device *pdev)
 	lcd->pdev = pdev;
 
 	lcd->vdd = devm_regulator_get(&pdev->dev, "envdd");
-	if (IS_ERR(lcd->vdd)) {
-		dev_err(&pdev->dev, "failed to get regulator\n");
-		return PTR_ERR(lcd->vdd);
-	}
+	if (IS_ERR(lcd->vdd))
+		return dev_err_probe(&pdev->dev, PTR_ERR(lcd->vdd),
+				     "failed to get regulator\n");
 
 	lcd->ini_gpio = devm_gpiod_get(&pdev->dev, "enable", GPIOD_OUT_LOW);
-	if (IS_ERR(lcd->ini_gpio)) {
-		dev_err(&pdev->dev, "failed to get enable gpio\n");
-		return PTR_ERR(lcd->ini_gpio);
-	}
+	if (IS_ERR(lcd->ini_gpio))
+		return dev_err_probe(&pdev->dev, PTR_ERR(lcd->ini_gpio),
+				     "failed to get enable gpio\n");
 
 	lcd->resb_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
-	if (IS_ERR(lcd->resb_gpio)) {
-		dev_err(&pdev->dev, "failed to get reset gpio\n");
-		return PTR_ERR(lcd->resb_gpio);
-	}
+	if (IS_ERR(lcd->resb_gpio))
+		return dev_err_probe(&pdev->dev, PTR_ERR(lcd->resb_gpio),
+				     "failed to get reset gpio\n");
 
 	lcd->mo_gpio = devm_gpiod_get_index(&pdev->dev, "mode", 0,
 					    GPIOD_OUT_LOW);
-- 
2.25.1