linux-kernel - [PATCH drm-dp 04/10] drm/hisilicon/hibmc: fix the hibmc loaded failed bug

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Message-ID: <20250530095432.1206966-5-shiyongbang@huawei.com>
Date: Fri, 30 May 2025 17:54:26 +0800
From: Yongbang Shi <shiyongbang@...wei.com>
To: <xinliang.liu@...aro.org>, <tiantao6@...ilicon.com>,
	<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
	<tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
	<kong.kongxinwei@...ilicon.com>
CC: <liangjian010@...wei.com>, <chenjianmin@...wei.com>,
	<lidongming5@...wei.com>, <libaihan@...wei.com>, <shenjian15@...wei.com>,
	<shaojijie@...wei.com>, <jani.nikula@...ux.intel.com>,
	<dmitry.baryshkov@....qualcomm.com>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH drm-dp 04/10] drm/hisilicon/hibmc: fix the hibmc loaded failed bug

From: Baihan Li <libaihan@...wei.com>

When hibmc loaded failed, the driver use hibmc_unload to free the
resource, but the mutexes in mode.config are not init, which will
access an NULL pointer.

Fixes: b3df5e65cc03 ("drm/hibmc: Drop drm_vblank_cleanup")
Reported-by: oushixiong1025@....com
Signed-off-by: Baihan Li <libaihan@...wei.com>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 4cdcc34070ee..ac552c339671 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -319,13 +319,13 @@ static int hibmc_load(struct drm_device *dev)
 
 	ret = hibmc_hw_init(priv);
 	if (ret)
-		goto err;
+		return ret;
 
 	ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0),
 				    pci_resource_len(pdev, 0));
 	if (ret) {
 		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
-		goto err;
+		return ret;
 	}
 
 	ret = hibmc_kms_init(priv);
-- 
2.33.0