staging: hv: Use kmemdup rather than duplicating its implementation

Use kmemdup rather than duplicating its implementation

The semantic patch that makes this change is available
in scripts/coccinelle/api/memdup.cocci.

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/hv_mouse.c

@@ -201,13 +201,11 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device,
 	desc = &device_info->hid_descriptor;
 	WARN_ON(desc->bLength == 0);
 
-	input_device->hid_desc = kzalloc(desc->bLength, GFP_ATOMIC);
+	input_device->hid_desc = kmemdup(desc, desc->bLength, GFP_ATOMIC);
 
 	if (!input_device->hid_desc)
 		goto cleanup;
 
-	memcpy(input_device->hid_desc, desc, desc->bLength);
-
 	input_device->report_desc_size = desc->desc[0].wDescriptorLength;
 	if (input_device->report_desc_size == 0)
 		goto cleanup;

drivers/staging/hv/netvsc.c

@@ -230,19 +230,14 @@ static int netvsc_init_recv_buf(struct hv_device *device)
 	net_device->recv_section_cnt = init_packet->msg.
 		v1_msg.send_recv_buf_complete.num_sections;
 
-	net_device->recv_section = kmalloc(net_device->recv_section_cnt
-		* sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL);
+	net_device->recv_section = kmemdup(init_packet->msg.v1_msg.send_recv_buf_complete.sections,
+					   net_device->recv_section_cnt * sizeof(struct nvsp_1_receive_buffer_section),
+					   GFP_KERNEL);
 	if (net_device->recv_section == NULL) {
 		ret = -EINVAL;
 		goto cleanup;
 	}
 
-	memcpy(net_device->recv_section,
-		init_packet->msg.v1_msg.
-	       send_recv_buf_complete.sections,
-		net_device->recv_section_cnt *
-	       sizeof(struct nvsp_1_receive_buffer_section));
-
 	/*
 	 * For 1st release, there should only be 1 section that represents the
 	 * entire receive buffer