[PATCH] usbcore: Use kzalloc instead of kmalloc/memset

This patch (as590) fixes up all the remaining places where usbcore can
use kzalloc rather than kmalloc/memset.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/config.c

@@ -188,10 +188,9 @@ static int usb_parse_interface(struct device *ddev, int cfgno,
 	}
 
 	len = sizeof(struct usb_host_endpoint) * num_ep;
-	alt->endpoint = kmalloc(len, GFP_KERNEL);
+	alt->endpoint = kzalloc(len, GFP_KERNEL);
 	if (!alt->endpoint)
 		return -ENOMEM;
-	memset(alt->endpoint, 0, len);
 
 	/* Parse all the endpoint descriptors */
 	n = 0;
@@ -353,10 +352,9 @@ static int usb_parse_configuration(struct device *ddev, int cfgidx,
 		}
 
 		len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j;
-		config->intf_cache[i] = intfc = kmalloc(len, GFP_KERNEL);
+		config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL);
 		if (!intfc)
 			return -ENOMEM;
-		memset(intfc, 0, len);
 		kref_init(&intfc->ref);
 	}
 
@@ -459,16 +457,14 @@ int usb_get_configuration(struct usb_device *dev)
 	}
 
 	length = ncfg * sizeof(struct usb_host_config);
-	dev->config = kmalloc(length, GFP_KERNEL);
+	dev->config = kzalloc(length, GFP_KERNEL);
 	if (!dev->config)
 		goto err2;
-	memset(dev->config, 0, length);
 
 	length = ncfg * sizeof(char *);
-	dev->rawdescriptors = kmalloc(length, GFP_KERNEL);
+	dev->rawdescriptors = kzalloc(length, GFP_KERNEL);
 	if (!dev->rawdescriptors)
 		goto err2;
-	memset(dev->rawdescriptors, 0, length);
 
 	buffer = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
 	if (!buffer)

drivers/usb/core/devio.c

@@ -210,10 +210,10 @@ err:
 static struct async *alloc_async(unsigned int numisoframes)
 {
         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
-        struct async *as = kmalloc(assize, GFP_KERNEL);
+        struct async *as = kzalloc(assize, GFP_KERNEL);
+
         if (!as)
                 return NULL;
-        memset(as, 0, assize);
 	as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
 	if (!as->urb) {
 		kfree(as);

drivers/usb/core/hcd.c

@@ -744,10 +744,9 @@ struct usb_bus *usb_alloc_bus (struct usb_operations *op)
 {
 	struct usb_bus *bus;
 
-	bus = kmalloc (sizeof *bus, GFP_KERNEL);
+	bus = kzalloc (sizeof *bus, GFP_KERNEL);
 	if (!bus)
 		return NULL;
-	memset(bus, 0, sizeof(struct usb_bus));
 	usb_bus_init (bus);
 	bus->op = op;
 	return bus;

drivers/usb/core/hub.c

@@ -865,14 +865,12 @@ descriptor_error:
 	/* We found a hub */
 	dev_info (&intf->dev, "USB hub found\n");
 
-	hub = kmalloc(sizeof(*hub), GFP_KERNEL);
+	hub = kzalloc(sizeof(*hub), GFP_KERNEL);
 	if (!hub) {
 		dev_dbg (&intf->dev, "couldn't kmalloc hub struct\n");
 		return -ENOMEM;
 	}
 
-	memset(hub, 0, sizeof(*hub));
-
 	INIT_LIST_HEAD(&hub->event_list);
 	hub->intfdev = &intf->dev;
 	hub->hdev = hdev;

drivers/usb/core/message.c

@@ -1350,7 +1350,7 @@ int usb_set_configuration(struct usb_device *dev, int configuration)
 		}
 
 		for (; n < nintf; ++n) {
-			new_interfaces[n] = kmalloc(
+			new_interfaces[n] = kzalloc(
 					sizeof(struct usb_interface),
 					GFP_KERNEL);
 			if (!new_interfaces[n]) {
@@ -1391,7 +1391,6 @@ free_interfaces:
 			struct usb_host_interface *alt;
 
 			cp->interface[i] = intf = new_interfaces[i];
-			memset(intf, 0, sizeof(*intf));
 			intfc = cp->intf_cache[i];
 			intf->altsetting = intfc->altsetting;
 			intf->num_altsetting = intfc->num_altsetting;

drivers/usb/core/usb.c

@@ -704,12 +704,10 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
 {
 	struct usb_device *dev;
 
-	dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev)
 		return NULL;
 
-	memset(dev, 0, sizeof(*dev));
-
 	bus = usb_bus_get(bus);
 	if (!bus) {
 		kfree(dev);