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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>
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@ -88,7 +88,7 @@ static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
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ret = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, 0,
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ZFCP_REQ_AUTO_CLEANUP);
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if (unlikely(ret == -EBUSY))
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zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
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return SCSI_MLQUEUE_DEVICE_BUSY;
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else if (unlikely(ret < 0))
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return SCSI_MLQUEUE_HOST_BUSY;
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