[SCSI] zfcp: Hold queue lock when checking port/unit handle for FCP command

[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / drivers / s390 / scsi / zfcp_fsf.c

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 908e8b2107c1cb1b8adcb2a5ec874b305d68869b..17c251cb10aa2b4cea88acece37b96b3ec100a1a 100644 (file)
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -3593,6 +3593,12 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
                goto failed_req_create;
        }
 
+       if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED,
+                       &unit->status))) {
+               retval = -EBUSY;
+               goto unit_blocked;
+       }
+
        zfcp_unit_get(unit);
        fsf_req->unit = unit;
 
@@ -3733,6 +3739,7 @@ zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
  send_failed:
  no_fit:
  failed_scsi_cmnd:
+ unit_blocked:
        zfcp_unit_put(unit);
        zfcp_fsf_req_free(fsf_req);
        fsf_req = NULL;