[S390] cio: Use strict_strtoul() for attributes.

Make parsing of attribute writes handle incorrect input better.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index fe1ad17..85b2e51 100644 (file)
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -318,7 +318,7 @@ ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const
 {
        struct ccwgroup_device *gdev;
        struct ccwgroup_driver *gdrv;
-       unsigned int value;
+       unsigned long value;
        int ret;
 
        gdev = to_ccwgroupdev(dev);
@@ -329,7 +329,9 @@ ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const
        if (!try_module_get(gdrv->owner))
                return -EINVAL;
 
-       value = simple_strtoul(buf, NULL, 0);
+       ret = strict_strtoul(buf, 0, &value);
+       if (ret)
+               goto out;
        ret = count;
        if (value == 1)
                ccwgroup_set_online(gdev);
@@ -337,6 +339,7 @@ ccwgroup_online_store (struct device *dev, struct device_attribute *attr, const
                ccwgroup_set_offline(gdev);
        else
                ret = -EINVAL;
+out:
        module_put(gdrv->owner);
        return ret;
 }

diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c
index f4c132a..2808b68 100644 (file)
--- a/drivers/s390/cio/cmf.c
+++ b/drivers/s390/cio/cmf.c
@@ -1219,16 +1219,21 @@ static ssize_t cmb_enable_store(struct device *dev,
 {
        struct ccw_device *cdev;
        int ret;
+       unsigned long val;
+
+       ret = strict_strtoul(buf, 16, &val);
+       if (ret)
+               return ret;
 
        cdev = to_ccwdev(dev);
 
-       switch (buf[0]) {
-       case '0':
+       switch (val) {
+       case 0:
                ret = disable_cmf(cdev);
                if (ret)
                        dev_info(&cdev->dev, "disable_cmf failed (%d)\n", ret);
                break;
-       case '1':
+       case 1:
                ret = enable_cmf(cdev);
                if (ret && ret != -EBUSY)
                        dev_info(&cdev->dev, "enable_cmf failed (%d)\n", ret);

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index c1afab5..595e327 100644 (file)
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -705,13 +705,17 @@ css_cm_enable_store(struct device *dev, struct device_attribute *attr,
 {
        struct channel_subsystem *css = to_css(dev);
        int ret;
+       unsigned long val;
 
+       ret = strict_strtoul(buf, 16, &val);
+       if (ret)
+               return ret;
        mutex_lock(&css->mutex);
-       switch (buf[0]) {
-       case '0':
+       switch (val) {
+       case 0:
                ret = css->cm_enabled ? chsc_secm(css, 0) : 0;
                break;
-       case '1':
+       case 1:
                ret = css->cm_enabled ? 0 : chsc_secm(css, 1);
                break;
        default:

diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index e0c7adb..abfd601 100644 (file)
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -512,8 +512,8 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr,
                             const char *buf, size_t count)
 {
        struct ccw_device *cdev = to_ccwdev(dev);
-       int i, force;
-       char *tmp;
+       int force, ret;
+       unsigned long i;
 
        if (atomic_cmpxchg(&cdev->private->onoff, 0, 1) != 0)
                return -EAGAIN;
@@ -525,25 +525,30 @@ static ssize_t online_store (struct device *dev, struct device_attribute *attr,
        if (!strncmp(buf, "force\n", count)) {
                force = 1;
                i = 1;
+               ret = 0;
        } else {
                force = 0;
-               i = simple_strtoul(buf, &tmp, 16);
+               ret = strict_strtoul(buf, 16, &i);
        }
-
+       if (ret)
+               goto out;
        switch (i) {
        case 0:
                online_store_handle_offline(cdev);
+               ret = count;
                break;
        case 1:
                online_store_handle_online(cdev, force);
+               ret = count;
                break;
        default:
-               count = -EINVAL;
+               ret = -EINVAL;
        }
+out:
        if (cdev->drv)
                module_put(cdev->drv->owner);
        atomic_set(&cdev->private->onoff, 0);
-       return count;
+       return ret;
 }
 
 static ssize_t

diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index 43876e2..445cf36 100644 (file)
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -3663,11 +3663,11 @@ qdio_performance_stats_show(struct bus_type *bus, char *buf)
 static ssize_t
 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
 {
-       char *tmp;
-       int i;
+       unsigned long i;
+       int ret;
 
-       i = simple_strtoul(buf, &tmp, 16);
-       if ((i == 0) || (i == 1)) {
+       ret = strict_strtoul(buf, 16, &i);
+       if (!ret && ((i == 0) || (i == 1))) {
                if (i == qdio_performance_stats)
                        return count;
                qdio_performance_stats = i;