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Subject[PATCH v2 2/2] scsi: sr: Fix sr_probe() missing deallocate of device minor
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If the cdrom fails to be registered then the device minor should be
deallocated.

Signed-off-by: Simon Arlott <simon@octiron.net>
Cc: stable@vger.kernel.org
---
On 30/05/2020 17:24, Bart Van Assche wrote:
> On 2020-05-30 02:33, Simon Arlott wrote:
>> If the cdrom fails to be registered then the device minor should be
>> deallocated.
>
> Also for this patch, please add Fixes: and Cc: stable tags.

I've Cc:'d stable.

There is no specific previous commit that this fixes. I was just
checking the rest of sr_probe when making a patch for the first issue.

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 8d062d4f3ce0..1e13c6a0f0ca 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -797,7 +797,7 @@ 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
@@ -815,6 +815,10 @@ 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);
mutex_destroy(&cd->lock);
--
2.17.1
--
Simon Arlott

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