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xenbus: remove transaction holder from list before freeing 

After allocation the item is being placed on the list right away.
Consequently it needs to be taken off the list before freeing in the
case xenbus_dev_request_and_reply() failed, as in that case the
callback (xenbus_dev_queue_reply()) is not being called (and if it
was called, it should do both).

Fixes: 5584ea250a
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
This commit is contained in:
Jan Beulich 2017-04-04 06:27:22 -06:00 committed by Boris Ostrovsky
parent 1914f0cd20
commit ac4cde398a
1 changed files with 3 additions and 1 deletions
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4
drivers/xen/xenbus/xenbus_dev_frontend.c
View File

@ -442,8 +442,10 @@ static int xenbus_write_transaction(unsigned msg_type,
return xenbus_command_reply(u, XS_ERROR, "ENOENT");
rc = xenbus_dev_request_and_reply(&u->u.msg, u);
if (rc)
if (rc && trans) {
list_del(&trans->list);
kfree(trans);
}
out:
return rc;