linux-kernel - [PATCH] drm/panel: feiyang-fy07024di26a30d: cleanup if panel attaching failed

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Message-Id: <20201128125257.1626588-1-icenowy@aosc.io>
Date:   Sat, 28 Nov 2020 20:52:57 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     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>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Icenowy Zheng <icenowy@...c.io>
Subject: [PATCH] drm/panel: feiyang-fy07024di26a30d: cleanup if panel attaching failed

Attaching the panel can fail, so cleanup work is necessary, otherwise
a pointer to freed struct drm_panel* will remain in drm_panel code.

Do the cleanup if panel attaching failed.

Fixes: 69dc678abc2b ("drm/panel: Add Feiyang FY07024DI26A30-D MIPI-DSI LCD panel")
Signed-off-by: Icenowy Zheng <icenowy@...c.io>
---
 drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
index 581661b506f8..f9c1f7bc8218 100644
--- a/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
+++ b/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
@@ -227,7 +227,13 @@ static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
 	dsi->format = MIPI_DSI_FMT_RGB888;
 	dsi->lanes = 4;
 
-	return mipi_dsi_attach(dsi);
+	ret = mipi_dsi_attach(dsi);
+	if (ret < 0) {
+		drm_panel_remove(&ctx->panel);
+		return ret;
+	}
+
+	return 0;
 }
 
 static int feiyang_dsi_remove(struct mipi_dsi_device *dsi)
-- 
2.28.0