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[S390] dasd: fix locking bug

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Replace spin_lock with spin_lock_irqsave in dasd_eckd_restore_device.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2009-10-14 12:43:46 +02:00 committed by Martin Schwidefsky
parent 03cadd36d5
commit a7602f6c16
1 changed files with 5 additions and 3 deletions
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8
drivers/s390/block/dasd_eckd.c
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@ -3216,6 +3216,7 @@ int dasd_eckd_restore_device(struct dasd_device *device)
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;
@ -3228,7 +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);
@ -3256,9 +3258,9 @@ int dasd_eckd_restore_device(struct dasd_device *device)
"device: %s", rc, dev_name(&device->cdev->dev));
goto out_err;
}
spin_lock(get_ccwdev_lock(device->cdev));
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
spin_unlock(get_ccwdev_lock(device->cdev));
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/* add device to alias management */
dasd_alias_add_device(device);