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s390/dasd: allow 0 for path_threshold attribute 

Allow 0 as valid input for the path_threshold attribute to deactivate
the IFCC/CCC error handling.

Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Stefan Haberland 2017-01-25 14:08:20 +01:00 committed by Martin Schwidefsky
parent 34525e1f7e
commit defc2a9b98
1 changed files with 2 additions and 4 deletions
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6
drivers/s390/block/dasd_devmap.c
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@ -1518,14 +1518,12 @@ dasd_path_threshold_store(struct device *dev, struct device_attribute *attr,
if (IS_ERR(device))
return -ENODEV;
if ((kstrtoul(buf, 10, &val) != 0) ||
(val > DASD_THRHLD_MAX) || val == 0) {
if (kstrtoul(buf, 10, &val) != 0 || val > DASD_THRHLD_MAX) {
dasd_put_device(device);
return -EINVAL;
}
spin_lock_irqsave(get_ccwdev_lock(to_ccwdev(dev)), flags);
if (val)
device->path_thrhld = val;
device->path_thrhld = val;
spin_unlock_irqrestore(get_ccwdev_lock(to_ccwdev(dev)), flags);
dasd_put_device(device);
return count;