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xenbus: don't look up transaction IDs for ordinary writes

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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: "M. Vefa Bicakci" <m.v.b@runbox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jan Beulich 2016-08-15 09:02:38 -06:00 • committed by Greg Kroah-Hartman
parent edd2b5fd02
commit 03cebefe89
1 changed files with 1 additions and 1 deletions
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2
drivers/xen/xenbus/xenbus_dev_frontend.c
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@ -316,7 +316,7 @@ static int xenbus_write_transaction(unsigned msg_type,
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;