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path: root/drivers/s390/block/dasd_eer.c
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Diffstat (limited to 'drivers/s390/block/dasd_eer.c')
-rw-r--r--drivers/s390/block/dasd_eer.c29
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/s390/block/dasd_eer.c b/drivers/s390/block/dasd_eer.c
index 21ef63cf0960..6c5d671304b4 100644
--- a/drivers/s390/block/dasd_eer.c
+++ b/drivers/s390/block/dasd_eer.c
@@ -454,20 +454,30 @@ static void dasd_eer_snss_cb(struct dasd_ccw_req *cqr, void *data)
*/
int dasd_eer_enable(struct dasd_device *device)
{
- struct dasd_ccw_req *cqr;
+ struct dasd_ccw_req *cqr = NULL;
unsigned long flags;
struct ccw1 *ccw;
+ int rc = 0;
+ spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
if (device->eer_cqr)
- return 0;
+ goto out;
+ else if (!device->discipline ||
+ strcmp(device->discipline->name, "ECKD"))
+ rc = -EMEDIUMTYPE;
+ else if (test_bit(DASD_FLAG_OFFLINE, &device->flags))
+ rc = -EBUSY;
- if (!device->discipline || strcmp(device->discipline->name, "ECKD"))
- return -EPERM; /* FIXME: -EMEDIUMTYPE ? */
+ if (rc)
+ goto out;
cqr = dasd_kmalloc_request(DASD_ECKD_MAGIC, 1 /* SNSS */,
SNSS_DATA_SIZE, device);
- if (IS_ERR(cqr))
- return -ENOMEM;
+ if (IS_ERR(cqr)) {
+ rc = -ENOMEM;
+ cqr = NULL;
+ goto out;
+ }
cqr->startdev = device;
cqr->retries = 255;
@@ -485,15 +495,18 @@ int dasd_eer_enable(struct dasd_device *device)
cqr->status = DASD_CQR_FILLED;
cqr->callback = dasd_eer_snss_cb;
- spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
if (!device->eer_cqr) {
device->eer_cqr = cqr;
cqr = NULL;
}
+
+out:
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
+
if (cqr)
dasd_kfree_request(cqr, device);
- return 0;
+
+ return rc;
}
/*