From aaf68b753313f1e67fd2e8996e32ab2813f441fa Mon Sep 17 00:00:00 2001 From: Joern Engel Date: Fri, 18 May 2012 13:58:23 -0700 Subject: [PATCH] tcm_qla2xxx: Convert to TFO->put_session() usage This patch converts tcm_qla2xxx code to use an internal kref_put() for se_session->sess_kref in order to ensure that qla_hw_data->hardware_lock can be held while calling qlt_unreg_sess() for the final put. Signed-off-by: Joern Engel Cc: Roland Dreier Cc: Arun Easi Signed-off-by: Nicholas Bellinger --- drivers/scsi/qla2xxx/tcm_qla2xxx.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 436598f57404..3cee5b67d65b 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -844,9 +844,28 @@ static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess) se_nacl, nacl->nport_wwnn, nacl->nport_id); } +static void tcm_qla2xxx_release_session(struct kref *kref) +{ + struct se_session *se_sess = container_of(kref, + struct se_session, sess_kref); + + qlt_unreg_sess(se_sess->fabric_sess_ptr); +} + +static void tcm_qla2xxx_put_session(struct se_session *se_sess) +{ + struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr; + struct qla_hw_data *ha = sess->vha->hw; + unsigned long flags; + + spin_lock_irqsave(&ha->hardware_lock, flags); + kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session); + spin_unlock_irqrestore(&ha->hardware_lock, flags); +} + static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess) { - target_put_session(sess->se_sess); + tcm_qla2xxx_put_session(sess->se_sess); } static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess) @@ -1731,6 +1750,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_ops = { .new_cmd_map = NULL, .check_stop_free = tcm_qla2xxx_check_stop_free, .release_cmd = tcm_qla2xxx_release_cmd, + .put_session = tcm_qla2xxx_put_session, .shutdown_session = tcm_qla2xxx_shutdown_session, .close_session = tcm_qla2xxx_close_session, .sess_get_index = tcm_qla2xxx_sess_get_index, @@ -1779,6 +1799,7 @@ static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = { .tpg_release_fabric_acl = tcm_qla2xxx_release_fabric_acl, .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index, .release_cmd = tcm_qla2xxx_release_cmd, + .put_session = tcm_qla2xxx_put_session, .shutdown_session = tcm_qla2xxx_shutdown_session, .close_session = tcm_qla2xxx_close_session, .sess_get_index = tcm_qla2xxx_sess_get_index, -- GitLab