[SCSI] zfcp: fix erp list usage without using locks
The zfcp_erp_thread was using the nolock version of the dbf function. This resulted in a list access while other tasks could modifying the list. The symptom was an erp thread running at 100% CPU and never returning from the dbf function. Signed-off-by: Swen Schillig <swen@vnet.ibm.com> Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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@ -1395,9 +1395,9 @@ static int zfcp_erp_thread(void *data)
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zfcp_erp_wakeup(adapter);
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}
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zfcp_rec_dbf_event_thread(4, adapter);
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zfcp_rec_dbf_event_thread_lock(4, adapter);
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down_interruptible(&adapter->erp_ready_sem);
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zfcp_rec_dbf_event_thread(5, adapter);
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zfcp_rec_dbf_event_thread_lock(5, adapter);
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}
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atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);
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