4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Maurizio Lombardi <mlomb...@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 <mlomb...@redhat.com> Tested-by: Douglas Miller <dougm...@linux.vnet.ibm.com> Acked-by: James Bottomley <j...@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.peter...@oracle.com> Signed-off-by: Greg Kroah-Hartman <gre...@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);