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xenbus: remove transaction holder from list before freeing

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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: 5584ea250ae44f929feb4c7bd3877d1c5edbf813
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
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@ -442,8 +442,10 @@ static int xenbus_write_transaction(unsigned msg_type,
return xenbus_command_reply(u, XS_ERROR, "ENOENT"); return xenbus_command_reply(u, XS_ERROR, "ENOENT");
rc = xenbus_dev_request_and_reply(&u->u.msg, u); rc = xenbus_dev_request_and_reply(&u->u.msg, u);
if (rc) if (rc && trans) {
list_del(&trans->list);
kfree(trans); kfree(trans);
}
out: out:
return rc; return rc;