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[SCSI] zfcp: prevent double decrement on host_busy while being busy 

The zfcp_scsi_queuecommand was not acting according to the standard
when the respective unit was not available. In this case an -EBUSY was
returned, which is not valid in itself, and in addition scsi_done
was called. This combination is not allowed and was leading to a
double finish of the request and therefor double decrement of the
host_busy counter.

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 2008-11-27 11:44:07 +01:00 committed by James Bottomley
parent fca55b6fb5
commit f7a65e92e4
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/scsi/zfcp_scsi.c
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@ -88,7 +88,7 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0,
ZFCP_REQ_AUTO_CLEANUP);
if (unlikely(ret == -EBUSY))
zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
return SCSI_MLQUEUE_DEVICE_BUSY;
else if (unlikely(ret < 0))
return SCSI_MLQUEUE_HOST_BUSY;