[SCSI] aic94xx: fix TMF ascb handling to prevent sequencer panic

[safe/jmp/linux-2.6] / drivers / scsi / aic94xx / aic94xx_task.c

diff --git a/drivers/scsi/aic94xx/aic94xx_task.c b/drivers/scsi/aic94xx/aic94xx_task.c
index 965d4bb..008df9a 100644 (file)
--- a/drivers/scsi/aic94xx/aic94xx_task.c
+++ b/drivers/scsi/aic94xx/aic94xx_task.c
@@ -343,11 +343,13 @@ Again:
        task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
        task->task_state_flags |= SAS_TASK_STATE_DONE;
        if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
+               struct completion *completion = ascb->completion;
                spin_unlock_irqrestore(&task->task_state_lock, flags);
                ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
                            "stat 0x%x but aborted by upper layer!\n",
                            task, opcode, ts->resp, ts->stat);
-               complete(&ascb->completion);
+               if (completion)
+                       complete(completion);
        } else {
                spin_unlock_irqrestore(&task->task_state_lock, flags);
                task->lldd_task = NULL;