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[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>
This commit is contained in:
Swen Schillig 2008-10-01 12:42:24 +02:00 committed by James Bottomley
parent e4e9ba5d93
commit 9fb3cd86e4
1 changed files with 2 additions and 2 deletions
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4
drivers/s390/scsi/zfcp_erp.c
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@ -1395,9 +1395,9 @@ static int zfcp_erp_thread(void *data)
zfcp_erp_wakeup(adapter);
}
zfcp_rec_dbf_event_thread(4, adapter);
zfcp_rec_dbf_event_thread_lock(4, adapter);
down_interruptible(&adapter->erp_ready_sem);
zfcp_rec_dbf_event_thread(5, adapter);
zfcp_rec_dbf_event_thread_lock(5, adapter);
}
atomic_clear_mask(ZFCP_STATUS_ADAPTER_ERP_THREAD_UP, &adapter->status);