diff options
| author | Mike Christie <mchristi@redhat.com> | 2018-08-02 12:12:20 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-19 22:48:56 +0200 |
| commit | 44dc4734a7810e7ee24fc8942a93ca5b8521a24b (patch) | |
| tree | 892cac5177b114e2496cc92dc47eb16a372f7b2f /drivers/target | |
| parent | bf748acafd58fe15bc74e0646bc95b4c3fdcb4c3 (diff) | |
scsi: target: fix __transport_register_session locking
[ Upstream commit 6a64f6e1591322beb8ce16e952a53582caf2a15c ]
When __transport_register_session is called from transport_register_session
irqs will already have been disabled, so we do not want the unlock irq call
to enable them until the higher level has done the final
spin_unlock_irqrestore/ spin_unlock_irq.
This has __transport_register_session use the save/restore call.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_transport.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 21f888ac550e..7199bac67333 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -306,6 +306,7 @@ void __transport_register_session( { const struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo; unsigned char buf[PR_REG_ISID_LEN]; + unsigned long flags; se_sess->se_tpg = se_tpg; se_sess->fabric_sess_ptr = fabric_sess_ptr; @@ -342,7 +343,7 @@ void __transport_register_session( se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]); } - spin_lock_irq(&se_nacl->nacl_sess_lock); + spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags); /* * The se_nacl->nacl_sess pointer will be set to the * last active I_T Nexus for each struct se_node_acl. @@ -351,7 +352,7 @@ void __transport_register_session( list_add_tail(&se_sess->sess_acl_list, &se_nacl->acl_sess_list); - spin_unlock_irq(&se_nacl->nacl_sess_lock); + spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags); } list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list); |