[PATCH] s390: Fix missing release function and cosmetic changes

- Use kzalloc() in blacklist.c.
- Kill unwanted casts in blacklist.c.
- Provide release function for struct channel_subsystem.

Signed-off-by: Cornelia Huck <[e-mail]>
Cc: Martin Schwidefsky <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/s390/cio/blacklist.c

···
 
 	if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
 		return NULL;
-	iter = kmalloc(sizeof(struct ccwdev_iter), GFP_KERNEL);
+	iter = kzalloc(sizeof(struct ccwdev_iter), GFP_KERNEL);
 	if (!iter)
 		return ERR_PTR(-ENOMEM);
-	memset(iter, 0, sizeof(struct ccwdev_iter));
 	iter->ssid = *offset / (__MAX_SUBCHANNEL + 1);
 	iter->devno = *offset % (__MAX_SUBCHANNEL + 1);
 	return iter;
···
 
 	if (*offset >= (__MAX_SUBCHANNEL + 1) * (__MAX_SSID + 1))
 		return NULL;
-	iter = (struct ccwdev_iter *)it;
+	iter = it;
 	if (iter->devno == __MAX_SUBCHANNEL) {
 		iter->devno = 0;
 		iter->ssid++;
···
 {
 	struct ccwdev_iter *iter;
 
-	iter = (struct ccwdev_iter *)it;
+	iter = it;
 	if (!is_blacklisted(iter->ssid, iter->devno))
 		/* Not blacklisted, nothing to output. */
 		return 0;

drivers/s390/cio/css.c

···
 
 }
 
+static void
+channel_subsystem_release(struct device *dev)
+{
+	struct channel_subsystem *css;
+
+	css = to_css(dev);
+	kfree(css);
+}
+
 static inline void __init
 setup_css(int nr)
 {
···
 	css[nr]->valid = 1;
 	css[nr]->cssid = nr;
 	sprintf(css[nr]->device.bus_id, "css%x", nr);
+	css[nr]->device.release = channel_subsystem_release;
 	tod_high = (u32) (get_clock() >> 32);
 	css_generate_pgid(css[nr], tod_high);
 }