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Subject[PATCH 4.12 041/196] scsi: ses: do not add a device to an enclosure if enclosure_add_links() fails.
Date
4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maurizio Lombardi <mlombard@redhat.com>

commit 62e62ffd95539b9220894a7900a619e0f3ef4756 upstream.

The enclosure_add_device() function should fail if it can't create the
relevant sysfs links.

Signed-off-by: Maurizio Lombardi <mlombard@redhat.com>
Tested-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Acked-by: James Bottomley <jejb@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/misc/enclosure.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -375,6 +375,7 @@ int enclosure_add_device(struct enclosur
struct device *dev)
{
struct enclosure_component *cdev;
+ int err;

if (!edev || component >= edev->components)
return -EINVAL;
@@ -384,12 +385,17 @@ int enclosure_add_device(struct enclosur
if (cdev->dev == dev)
return -EEXIST;

- if (cdev->dev)
+ if (cdev->dev) {
enclosure_remove_links(cdev);
-
- put_device(cdev->dev);
+ put_device(cdev->dev);
+ }
cdev->dev = get_device(dev);
- return enclosure_add_links(cdev);
+ err = enclosure_add_links(cdev);
+ if (err) {
+ put_device(cdev->dev);
+ cdev->dev = NULL;
+ }
+ return err;
}
EXPORT_SYMBOL_GPL(enclosure_add_device);


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