提交 f4c24db1 编写于 作者: J Joern Engel 提交者: Nicholas Bellinger

qla_target: don't delete changed nacls

The code is currently riddled with "drop the hardware_lock to avoid a
deadlock" bugs that expose races.  One of those races seems to expose a
valid warning in tcm_qla2xxx_clear_nacl_from_fcport_map.  Add some
bandaid to it.
Signed-off-by: NJoern Engel <joern@logfs.org>
Cc: <stable@vger.kernel.org> # v3.5+
Signed-off-by: NNicholas Bellinger <nab@linux-iscsi.org>
上级 f56574a2
......@@ -757,7 +757,16 @@ static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
WARN_ON(node && (node != se_nacl));
if (WARN_ON(node && (node != se_nacl))) {
/*
* The nacl no longer matches what we think it should be.
* Most likely a new dynamic acl has been added while
* someone dropped the hardware lock. It clearly is a
* bug elsewhere, but this bit can't make things worse.
*/
btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
node, GFP_ATOMIC);
}
pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
se_nacl, nacl->nport_wwnn, nacl->nport_id);
......
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