From: Luis Chamberlain <mcgrof@kernel.org>
Date: Fri, 15 Oct 2021 16:30:21 -0700
Subject: [PATCH] scsi: sr: Add error handling support for add_disk()
Git-commit: e9d658c2175b95a8f091b12ddefb271683aeacd9
Patch-mainline: v5.16-rc1
References: jsc#PED-1183
We never checked for errors on add_disk() as this function returned
void. Now that this is fixed, use the shiny new error handling.
Just put the cdrom kref and have the unwinding be done by
sr_kref_release().
Link: https://lore.kernel.org/r/20211015233028.2167651-3-mcgrof@kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/scsi/sr.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 8b17b35283aa..d769057b25a0 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -727,7 +727,12 @@ static int sr_probe(struct device *dev)
dev_set_drvdata(dev, cd);
disk->flags |= GENHD_FL_REMOVABLE;
sr_revalidate_disk(cd);
- device_add_disk(&sdev->sdev_gendev, disk, NULL);
+
+ error = device_add_disk(&sdev->sdev_gendev, disk, NULL);
+ if (error) {
+ kref_put(&cd->kref, sr_kref_release);
+ goto fail;
+ }
sdev_printk(KERN_DEBUG, sdev,
"Attached scsi CD-ROM %s\n", cd->cdi.name);
--
2.35.3