linux-kernel - [PATCH] drm/panel: k101-im2ba02: Make use of the helper function dev_err

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Date:   Thu, 16 Sep 2021 18:42:47 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Icenowy Zheng <icenowy@...c.io>,
        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: k101-im2ba02: 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>
---
 drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c b/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
index 2a602aee61c3..cb0bb3076099 100644
--- a/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
+++ b/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
@@ -456,16 +456,13 @@ static int k101_im2ba02_dsi_probe(struct mipi_dsi_device *dsi)
 
 	ret = devm_regulator_bulk_get(&dsi->dev, ARRAY_SIZE(ctx->supplies),
 				      ctx->supplies);
-	if (ret < 0) {
-		dev_err(&dsi->dev, "Couldn't get regulators\n");
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(&dsi->dev, ret, "Couldn't get regulators\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");
 
 	drm_panel_init(&ctx->panel, &dsi->dev, &k101_im2ba02_funcs,
 		       DRM_MODE_CONNECTOR_DSI);
-- 
2.25.1