[SCSI] zfcp: Dont clear reference from SCSI device to unit

It is possible that a remote port has a problem, the SCSI device gets
deleted after the rport timeout and then the timeout for pending SCSI
commands trigger an abort. For this case, don't delete the reference
from the SCSI device to the zfcp unit, so that we can still have the
reference to issue an abort request.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index ca8f85f3dad439f515e25b8e5b049a0edd3701ee..e46fd3e9f68fb85ff3dc9899e454772b5bb33a39 100644 (file)
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -24,14 +24,10 @@ char *zfcp_get_fcp_sns_info_ptr(struct fcp_rsp_iu *fcp_rsp_iu)
 static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
 {
        struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
-       WARN_ON(!unit);
-       if (unit) {
-               atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
-               sdpnt->hostdata = NULL;
-               unit->device = NULL;
-               zfcp_erp_unit_failed(unit, 12, NULL);
-               zfcp_unit_put(unit);
-       }
+       atomic_clear_mask(ZFCP_STATUS_UNIT_REGISTERED, &unit->status);
+       unit->device = NULL;
+       zfcp_erp_unit_failed(unit, 12, NULL);
+       zfcp_unit_put(unit);
 }
 
 static int zfcp_scsi_slave_configure(struct scsi_device *sdp)