linux-kernel - [PATCH] scsi: sd: unregister device if device_add_disk() failed in sd

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Message-Id: <20231208082335.1754205-1-linan666@huaweicloud.com>
Date:   Fri,  8 Dec 2023 16:23:35 +0800
From:   linan666@...weicloud.com
To:     jejb@...ux.ibm.com, martin.petersen@...cle.com, mcgrof@...nel.org
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linan122@...wei.com, yukuai3@...wei.com, yi.zhang@...wei.com,
        houtao1@...wei.com, yangerkun@...wei.com
Subject: [PATCH] scsi: sd: unregister device if device_add_disk() failed in sd_probe()

From: Li Nan <linan122@...wei.com>

"if device_add() succeeds, you should call device_del() when you want to
get rid of it."

In sd_probe(), device_add_disk() fails when device_add() has already
succeeded, so change put_device() to device_unregister() to ensure device
resources are released.

Fixes: 2a7a891f4c40 ("scsi: sd: Add error handling support for add_disk()")
Signed-off-by: Li Nan <linan122@...wei.com>
---
 drivers/scsi/sd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 542a4bbb21bc..d81cbeee06eb 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3736,7 +3736,7 @@ static int sd_probe(struct device *dev)
 
 	error = device_add_disk(dev, gd, NULL);
 	if (error) {
-		put_device(&sdkp->disk_dev);
+		device_unregister(&sdkp->disk_dev);
 		put_disk(gd);
 		goto out;
 	}
-- 
2.39.2