[SCSI] zfcp: Trigger logging in the FCP channel on qdio error conditions
Exploit the cio siosl function to trigger logging in the FCP channel
on qdio error conditions. Add a helper function in zfcp_qdio to ensure
that tracing is only triggered once before calling qdio_shutdown.
Trigger in zfcp for hardware logs are:
- timeout for FSF requests to the FCP channel
- "no recommendation" status from FCP channel
- invalid FSF protocol status
- stalled outbound queue
- unknown request id on inbound queue
- QDIO_ERROR_SLSB_STATE
All of the above triggers run from the Linux qdio softirq context, so
no additional synchronization is necessary for the handling of the
ZFCP_STATUS_ADAPTER_SIOSL_ISSUED flag.
Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
index de0925f..3b93239 100644
--- a/drivers/s390/scsi/zfcp_ext.h
+++ b/drivers/s390/scsi/zfcp_ext.h
@@ -152,6 +152,7 @@
struct scatterlist *);
extern int zfcp_qdio_open(struct zfcp_qdio *);
extern void zfcp_qdio_close(struct zfcp_qdio *);
+extern void zfcp_qdio_siosl(struct zfcp_adapter *);
/* zfcp_scsi.c */
extern struct zfcp_data zfcp_data;