Re: [PATCH v2 2/2] usb: misc: refactor code

[Alan Stern]

On Mon, 3 Apr 2017, Gustavo A. R. Silva wrote:

> Code refactoring to make the flow easier to follow.
> 
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
> ---
> Changes in v2:
>  Remove unfruitful changes in previous patch.
>  Revert change to comment.

For both patches:

Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>

>  drivers/usb/misc/usbtest.c | 49 ++++++++++++++++++++--------------------------
>  1 file changed, 21 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
> index 7bfb6b78..88f627e 100644
> --- a/drivers/usb/misc/usbtest.c
> +++ b/drivers/usb/misc/usbtest.c
> @@ -124,6 +124,20 @@ static struct usb_device *testdev_to_usbdev(struct usbtest_dev *test)
>  
>  /*-------------------------------------------------------------------------*/
>  
> +static inline void endpoint_update(int edi,
> +				   struct usb_host_endpoint **in,
> +				   struct usb_host_endpoint **out,
> +				   struct usb_host_endpoint *e)
> +{
> +	if (edi) {
> +		if (!*in)
> +			*in = e;
> +	} else {
> +		if (!*out)
> +			*out = e;
> +	}
> +}
> +
>  static int
>  get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
>  {
> @@ -151,47 +165,26 @@ get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
>  		 */
>  		for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
>  			struct usb_host_endpoint	*e;
> +			int edi;
>  
>  			e = alt->endpoint + ep;
> +			edi = usb_endpoint_dir_in(&e->desc);
> +
>  			switch (usb_endpoint_type(&e->desc)) {
>  			case USB_ENDPOINT_XFER_BULK:
> -				break;
> +				endpoint_update(edi, &in, &out, e);
> +				continue;
>  			case USB_ENDPOINT_XFER_INT:
>  				if (dev->info->intr)
> -					goto try_intr;
> +					endpoint_update(edi, &int_in, &int_out, e);
>  				continue;
>  			case USB_ENDPOINT_XFER_ISOC:
>  				if (dev->info->iso)
> -					goto try_iso;
> +					endpoint_update(edi, &iso_in, &iso_out, e);
>  				/* FALLTHROUGH */
>  			default:
>  				continue;
>  			}
> -			if (usb_endpoint_dir_in(&e->desc)) {
> -				if (!in)
> -					in = e;
> -			} else {
> -				if (!out)
> -					out = e;
> -			}
> -			continue;
> -try_intr:
> -			if (usb_endpoint_dir_in(&e->desc)) {
> -				if (!int_in)
> -					int_in = e;
> -			} else {
> -				if (!int_out)
> -					int_out = e;
> -			}
> -			continue;
> -try_iso:
> -			if (usb_endpoint_dir_in(&e->desc)) {
> -				if (!iso_in)
> -					iso_in = e;
> -			} else {
> -				if (!iso_out)
> -					iso_out = e;
> -			}
>  		}
>  		if ((in && out)  ||  iso_in || iso_out || int_in || int_out)
>  			goto found;
>