1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 6e14863f5c7..687f323cdc3 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -145,12 +145,10 @@ dasd_diag_erp(struct dasd_device *device)
         mdsk_term_io(device);
         rc = mdsk_init_io(device, device->block->bp_block, 0, NULL);
         if (rc == 4) {
-                if (!(device->features & DASD_FEATURE_READONLY)) {
+                if (!(test_and_set_bit(DASD_FLAG_DEVICE_RO, &device->flags)))
                         pr_warning("%s: The access mode of a DIAG device "
                                    "changed to read-only\n",
                                    dev_name(&device->cdev->dev));
-                        device->features |= DASD_FEATURE_READONLY;
-                }
                 rc = 0;
         }
         if (rc)
@@ -449,7 +447,7 @@ dasd_diag_check_device(struct dasd_device *device)
                 rc = -EIO;
         } else {
                 if (rc == 4)
-                        device->features |= DASD_FEATURE_READONLY;
+                        set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
                 pr_info("%s: New DASD with %ld byte/block, total size %ld "
                         "KB%s\n", dev_name(&device->cdev->dev),
                         (unsigned long) block->bp_block,