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target: Convert transport_deregister_session_configfs nacl_sess_lock to save irq state 

This patch converts transport_deregister_session_configfs() to save/restore
spinlock IRQ state for struct se_node_acl->nacl_sess_lock access as tcm_qla2xxx
logic expects to call transport_deregister_session_configfs() code with
irq save already held for struct qla_hw_data.

Reported-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Roland Dreier 2011-06-22 01:02:21 -07:00 committed by Nicholas Bellinger
parent 7fd29aa920
commit 233888644d
1 changed files with 3 additions and 3 deletions
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6
drivers/target/target_core_transport.c
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@ -536,13 +536,13 @@ EXPORT_SYMBOL(transport_register_session);
void transport_deregister_session_configfs(struct se_session *se_sess)
{
struct se_node_acl *se_nacl;
unsigned long flags;
/*
* Used by struct se_node_acl's under ConfigFS to locate active struct se_session
*/
se_nacl = se_sess->se_node_acl;
if ((se_nacl)) {
spin_lock_irq(&se_nacl->nacl_sess_lock);
spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags);
list_del(&se_sess->sess_acl_list);
/*
* If the session list is empty, then clear the pointer.
@ -556,7 +556,7 @@ void transport_deregister_session_configfs(struct se_session *se_sess)
se_nacl->acl_sess_list.prev,
struct se_session, sess_acl_list);
}
spin_unlock_irq(&se_nacl->nacl_sess_lock);
spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags);
}
}
EXPORT_SYMBOL(transport_deregister_session_configfs);