Re: [PATCH 2.6.16] rndis_host/cdc_ether: add support for Windows Mobile 5 based devices

[Andrew Morton <akpm@osdl.org>]

"Ole André Vadla Ravnås" <oleavr@gmail.com> wrote:
>
> +		/* allocate and fill in the missing structures */
> +		h = kmalloc(sizeof(struct usb_cdc_header_desc), GFP_KERNEL);
> +		if (!h)
> +			return -ENOMEM;
> +		info->header = h;
> +
> +		h->bLength = sizeof(struct usb_cdc_header_desc);
> +		h->bDescriptorType = USB_DT_CS_INTERFACE;
> +		h->bDescriptorSubType = USB_CDC_HEADER_TYPE;
> +
> +		h->bcdCDC = 0; /* FIXME */
> +		
> +		u = kmalloc(sizeof(struct usb_cdc_union_desc), GFP_KERNEL);
> +		if (!u)
> +			return -ENOMEM;
> +		info->u = u;

If the second kmalloc() fails, do we leak the memory at `h'?

Please don't sprinkle `return' statements deep inside large and complex
functions.  It makes the code hard to audit and to modify and it invites
resource leaks and locking errors.  Instead, use `goto suitable_unwind_point;', thanks.