linux-kernel - [PATCH] drm: mipi-dsi: Fix an API misuse in mipi_dsi_device_register

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Message-Id: <20250926091758.10069-1-haoxiang_li2024@163.com>
Date: Fri, 26 Sep 2025 17:17:58 +0800
From: Haoxiang Li <haoxiang_li2024@....com>
To: maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	andrzej.hajda@...el.com,
	treding@...dia.com,
	kyungmin.park@...sung.com
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Haoxiang Li <haoxiang_li2024@....com>,
	stable@...r.kernel.org
Subject: [PATCH] drm: mipi-dsi: Fix an API misuse in mipi_dsi_device_register_full()

mipi_dsi_device_alloc() calls device_initialize() to initialize value
"&dsi->dev". Thus "dsi" should be freed using put_device() in error
handling path.

Fixes: 068a00233969 ("drm: Add MIPI DSI bus support")
Cc: stable@...r.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@....com>
---
 drivers/gpu/drm/drm_mipi_dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 3a9b3278a6e3..21d9aa29ac34 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -233,7 +233,7 @@ mipi_dsi_device_register_full(struct mipi_dsi_host *host,
 	ret = mipi_dsi_device_add(dsi);
 	if (ret) {
 		dev_err(host->dev, "failed to add DSI device %d\n", ret);
-		kfree(dsi);
+		put_device(&dsi->dev);
 		return ERR_PTR(ret);
 	}
 
-- 
2.25.1