tree fae9d86d8415ea163a49df6bf290aaef8901702e
parent b7b8bef7f8c1c9b3358127608e867db7cd928022
author Christoph Hellwig <hch@infradead.org> 1318874205 -0400
committer Nicholas Bellinger <nab@linux-iscsi.org> 1319426499 +0000

target: fix list walking in transport_free_dev_tasks

list_for_each_entry_safe only protects against deletions from the list,
but not against any concurrent modifications.  Given that we drop
t_state_lock inside the loop it is not safe in transport_free_dev_tasks.

Instead of use a local dispose_list that we move all tasks that are
to be deleted to.  This is safe because we never do list_emptry checks
on t_list to check if a command is on the list anywhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>