linux-kernel - [PATCH] drm/panel: boe-tv101wum-nl6: Fix errors cases handling in prepare function

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Date:   Wed, 23 Feb 2022 12:40:36 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     thierry.reding@...il.com, sam@...nborg.org, airlied@...ux.ie,
        daniel@...ll.ch
Cc:     yangcong5@...qin.corp-partner.google.com,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [PATCH] drm/panel: boe-tv101wum-nl6: Fix errors cases handling in prepare function

Make sure that pp3300 regulator and enable gpio are cleaned before
leave in error cases.

Fixes: 18c58153b8c62 ("drm/panel: boe-tv101wum-nl6: Support enabling a 3.3V rail")
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index 5fcbde789ddb..382a17bb96d8 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -1245,11 +1245,11 @@ static int boe_panel_prepare(struct drm_panel *panel)
 
 	ret = regulator_enable(boe->pp3300);
 	if (ret < 0)
-		return ret;
+		goto disablegpio;
 
 	ret = regulator_enable(boe->pp1800);
 	if (ret < 0)
-		return ret;
+		goto poweroff3v3;
 
 	usleep_range(3000, 5000);
 
@@ -1286,6 +1286,9 @@ static int boe_panel_prepare(struct drm_panel *panel)
 poweroff1v8:
 	usleep_range(5000, 7000);
 	regulator_disable(boe->pp1800);
+poweroff3v3:
+	regulator_disable(boe->pp3300);
+disablegpio:
 	gpiod_set_value(boe->enable_gpio, 0);
 
 	return ret;
-- 
2.32.0