From f7a65e92e4bef3ccf9e008ed8cd52d914b6a4adb Mon Sep 17 00:00:00 2001 From: Swen Schillig Date: Thu, 27 Nov 2008 11:44:07 +0100 Subject: [PATCH] [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 Signed-off-by: Christof Schmitt Signed-off-by: James Bottomley --- drivers/s390/scsi/zfcp_scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index e46fd3e..468c880 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -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; -- 2.7.4