From: Stefan Haberland <sth@linux.vnet.ibm.com>
Date: Wed, 25 Jan 2017 13:08:20 +0000 (+0100)
Subject: s390/dasd: allow 0 for path_threshold attribute
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=defc2a9b9899511445cfbaa2c3a6509964b71207;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 041bdc4429c1..1164b51d09f3 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -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;