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e63a8e1933
linux-kernel-test/drivers/target
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Roland Dreier e63a8e1933 target: Make locking in transport_deregister_session() IRQ safe 
At least the tcm_qla2xxx fabric driver calls into transport_deregister_session()
while holding an IRQ-disabled spinlock, so the inner locking needs to
use spin_lock_irqsave() instead of spin_lock_bh().

This fixes warnings seen with tcm_qla2xxx like:

    WARNING: at kernel/softirq.c:159 local_bh_enable_ip+0x98/0xb0()
    Call Trace:
     [<ffffffff8104e65f>] warn_slowpath_common+0x7f/0xc0
     [<ffffffff8104e6ba>] warn_slowpath_null+0x1a/0x20
     [<ffffffff81055368>] local_bh_enable_ip+0x98/0xb0
     [<ffffffff814d5284>] _raw_spin_unlock_bh+0x14/0x20
     [<ffffffffa027b7f6>] transport_deregister_session+0x96/0x180 [target_core_mod]
     [<ffffffffa00f7731>] tcm_qla2xxx_free_session+0xd1/0x170 [tcm_qla2xxx]
     [<ffffffffa01b9173>] qla_tgt_sess_put+0xc3/0x140 [qla2xxx]
     [<ffffffffa01bf40f>] qla_tgt_stop_phase1+0x8f/0x2c0 [qla2xxx]
     [<ffffffffa00f735e>] tcm_qla2xxx_tpg_store_enable+0x6e/0xd0 [tcm_qla2xxx]
     [<ffffffffa026ca29>] target_fabric_tpg_attr_store+0x39/0x40 [target_core_mod]
     [<ffffffffa00a575d>] configfs_write_file+0xbd/0x120 [configfs]
     [<ffffffff811464a6>] vfs_write+0xc6/0x180
     [<ffffffff811467c1>] sys_write+0x51/0x90
     [<ffffffff814dd382>] system_call_fastpath+0x16/0x1b

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2011-08-22 19:26:33 +00:00
..
iscsi iscsi-target: Fix iscsit_allocate_se_cmd_for_tmr failure path bugs 2011-08-22 19:26:30 +00:00
loopback target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
tcm_fc tcm_fc: init/exit functions should not be protected by "#ifdef MODULE" 2011-08-22 19:26:32 +00:00
Kconfig iscsi-target: Add iSCSI fabric support for target v4.1 2011-07-26 09:16:43 +00:00
Makefile iscsi-target: Add iSCSI fabric support for target v4.1 2011-07-26 09:16:43 +00:00
target_core_alua.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_alua.h
target_core_cdb.c target: Print subpage too for unhandled MODE SENSE pages 2011-08-22 19:26:31 +00:00
target_core_configfs.c target: fix typo Assoication -> Association 2011-07-22 09:37:49 +00:00
target_core_device.c target: Fix task count > 1 handling breakage and use max_sector page alignment 2011-08-22 19:26:27 +00:00
target_core_fabric_configfs.c target: Use ERR_CAST inlined function 2011-08-22 19:26:15 +00:00
target_core_fabric_lib.c target: remove custom hex2bin() implementation 2011-07-22 09:37:49 +00:00
target_core_file.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_file.h target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_hba.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_hba.h
target_core_iblock.c target: ->map_task_SG conversion to ->map_control_SG and ->map_data_SG 2011-07-22 09:37:48 +00:00
target_core_iblock.h target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_pr.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_pr.h target: Core cleanups from AGrover (round 1) 2011-07-22 09:37:43 +00:00
target_core_pscsi.c target: ->map_task_SG conversion to ->map_control_SG and ->map_data_SG 2011-07-22 09:37:48 +00:00
target_core_pscsi.h target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_rd.c target: Convert target_core_rd.c to use use BUG_ON 2011-08-22 19:26:17 +00:00
target_core_rd.h target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_scdb.c target: Pass 2nd param of transport_split_cdb by value 2011-07-22 09:37:48 +00:00
target_core_scdb.h target: Pass 2nd param of transport_split_cdb by value 2011-07-22 09:37:48 +00:00
target_core_stat.c target: Core cleanups from AGrover (round 1) 2011-07-22 09:37:43 +00:00
target_core_stat.h [SCSI] target: add initial statistics 2011-03-23 11:36:50 -05:00
target_core_tmr.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_tpg.c target: Make standard INQUIRY return 'not connected' for tpg_virt_lun0 2011-08-22 19:25:35 +00:00
target_core_transport.c target: Make locking in transport_deregister_session() IRQ safe 2011-08-22 19:26:33 +00:00
target_core_ua.c target: Follow up core updates from AGrover and HCH (round 4) 2011-07-22 09:37:48 +00:00
target_core_ua.h