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    Subject[PATCH 3.16 343/346] xenbus: don't look up transaction IDs for ordinary writes
    3.16.39-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Jan Beulich <JBeulich@suse.com>

    commit 9a035a40f7f3f6708b79224b86c5777a3334f7ea upstream.

    This should really only be done for XS_TRANSACTION_END messages, or
    else at least some of the xenstore-* tools don't work anymore.

    Fixes: 0beef634b8 ("xenbus: don't BUG() on user mode induced condition")
    Reported-by: Richard Schütz <rschuetz@uni-koblenz.de>
    Signed-off-by: Jan Beulich <jbeulich@suse.com>
    Tested-by: Richard Schütz <rschuetz@uni-koblenz.de>
    Signed-off-by: David Vrabel <david.vrabel@citrix.com>
    Cc: Ed Swierk <eswierk@skyportsystems.com>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    drivers/xen/xenbus/xenbus_dev_frontend.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/xen/xenbus/xenbus_dev_frontend.c
    +++ b/drivers/xen/xenbus/xenbus_dev_frontend.c
    @@ -316,7 +316,7 @@ static int xenbus_write_transaction(unsi
    rc = -ENOMEM;
    goto out;
    }
    - } else {
    + } else if (msg_type == XS_TRANSACTION_END) {
    list_for_each_entry(trans, &u->transactions, list)
    if (trans->handle.id == u->u.msg.tx_id)
    break;
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