[PATCH AUTOSEL 4.19 048/172] scsi: sr: Fix sr_probe() missing deallocate of device minor

Sasha Levin
2020-06-18T01:26:39Z

From: Simon Arlott <simon@octiron.net>

[ Upstream commit 6555781b3fdec5e94e6914511496144241df7dee ]

If the cdrom fails to be registered then the device minor should be
deallocated.

Link: https://lore.kernel.org/r/072dac4b-8402-4de8-36bd-47e7588969cd@0882a8b5-c6c3-11e9-b005-00805fc181fe
Signed-off-by: Simon Arlott <simon@octiron.net>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/sr.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index d0389b20574d..5be3d6b7991b 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -748,7 +748,7 @@ static int sr_probe(struct device *dev)
cd->cdi.disk = disk;

if (register_cdrom(&cd->cdi))
- goto fail_put;
+ goto fail_minor;

/*
* Initialize block layer runtime PM stuffs before the
@@ -766,6 +766,10 @@ static int sr_probe(struct device *dev)

return 0;

+fail_minor:
+ spin_lock(&sr_index_lock);
+ clear_bit(minor, sr_index_bits);
+ spin_unlock(&sr_index_lock);
fail_put:
put_disk(disk);
fail_free:
--
2.25.1