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path: root/drivers/s390/block/dasd_eckd.c
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Diffstat (limited to 'drivers/s390/block/dasd_eckd.c')
-rw-r--r--drivers/s390/block/dasd_eckd.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index ab352175558..417b97cd3f9 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2338,6 +2338,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
/* Calculate number of blocks/records per track. */
blksize = block->bp_block;
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
+ if (blk_per_trk == 0)
+ return ERR_PTR(-EINVAL);
/* Calculate record id of first and last block. */
first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift;
first_offs = sector_div(first_trk, blk_per_trk);
@@ -3211,8 +3213,10 @@ int dasd_eckd_pm_freeze(struct dasd_device *device)
int dasd_eckd_restore_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
+ struct dasd_eckd_characteristics temp_rdc_data;
int is_known, rc;
struct dasd_uid temp_uid;
+ unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
@@ -3225,7 +3229,8 @@ int dasd_eckd_restore_device(struct dasd_device *device)
rc = dasd_eckd_generate_uid(device, &private->uid);
dasd_get_uid(device->cdev, &temp_uid);
if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
- dev_err(&device->cdev->dev, "The UID of the DASD has changed\n");
+ dev_err(&device->cdev->dev, "The UID of the DASD has "
+ "changed\n");
if (rc)
goto out_err;
dasd_set_uid(device->cdev, &private->uid);
@@ -3245,15 +3250,17 @@ int dasd_eckd_restore_device(struct dasd_device *device)
dasd_eckd_read_features(device);
/* Read Device Characteristics */
- memset(&private->rdc_data, 0, sizeof(private->rdc_data));
rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
- &private->rdc_data, 64);
+ &temp_rdc_data, 64);
if (rc) {
DBF_EVENT(DBF_WARNING,
"Read device characteristics failed, rc=%d for "
"device: %s", rc, dev_name(&device->cdev->dev));
goto out_err;
}
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
+ memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
+ spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/* add device to alias management */
dasd_alias_add_device(device);