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target: Fix incorrect usage of nested IRQ spinlocks in ABORT_TASK path 

This patch changes core_tmr_abort_task() to use spin_lock -> spin_unlock
around se_cmd->t_state_lock while spin_lock_irqsave is held via
se_sess->sess_cmd_lock.

Signed-off-by: Steve Hodgson <steve@purestorage.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Steve Hodgson 2012-10-31 10:24:02 -07:00 committed by Nicholas Bellinger
parent d5627acba9
commit ab74b3d62f
1 changed files with 3 additions and 3 deletions
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6
drivers/target/target_core_tmr.c
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@ -140,15 +140,15 @@ void core_tmr_abort_task(
printk("ABORT_TASK: Found referenced %s task_tag: %u\n",
se_cmd->se_tfo->get_fabric_name(), ref_tag);
spin_lock_irq(&se_cmd->t_state_lock);
spin_lock(&se_cmd->t_state_lock);
if (se_cmd->transport_state & CMD_T_COMPLETE) {
printk("ABORT_TASK: ref_tag: %u already complete, skipping\n", ref_tag);
spin_unlock_irq(&se_cmd->t_state_lock);
spin_unlock(&se_cmd->t_state_lock);
spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
goto out;
}
se_cmd->transport_state |= CMD_T_ABORTED;
spin_unlock_irq(&se_cmd->t_state_lock);
spin_unlock(&se_cmd->t_state_lock);
list_del_init(&se_cmd->se_cmd_list);
kref_get(&se_cmd->cmd_kref);