[PATCH 3.16 078/192] scsi: ses: do not add a device to an enclosure if enclosure_add_links() fails.

Ben Hutchings
2017-10-09T12:46:49Z

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: Ben Hutchings <ben@decadent.org.uk>
---
drivers/misc/enclosure.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/misc/enclosure.c
+++ b/drivers/misc/enclosure.c
@@ -320,6 +320,7 @@ int enclosure_add_device(struct enclosur
struct device *dev)
{
struct enclosure_component *cdev;
+ int err;

if (!edev || component >= edev->components)
return -EINVAL;
@@ -329,12 +330,17 @@ 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);