usbmon: Update pipe removal to suit my taste

This is a set of small updates to Alan's work to make the code more to
my liking. Mostly premature optimizations, but also direction of control
transfers in the binary interface was always out.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 14 insertions, 30 deletions

diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c
index 0b0d77c669da..5185e93dedef 100644
--- a/drivers/usb/mon/mon_bin.c
+++ b/drivers/usb/mon/mon_bin.c
@@ -172,6 +172,10 @@ static inline struct mon_bin_hdr *MON_OFF2HDR(const struct mon_reader_bin *rp,
 
 #define MON_RING_EMPTY(rp)	((rp)->b_cnt == 0)
 
+static unsigned char xfer_to_pipe[4] = {
+	PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
+};
+
 static struct class *mon_bin_class;
 static dev_t mon_bin_dev0;
 static struct cdev mon_bin_cdev;
@@ -388,11 +392,13 @@ static char mon_bin_get_data(const struct mon_reader_bin *rp,
 static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
     char ev_type)
 {
+	const struct usb_endpoint_descriptor *epd = &urb->ep->desc;
 	unsigned long flags;
 	struct timeval ts;
 	unsigned int urb_length;
 	unsigned int offset;
 	unsigned int length;
+	unsigned char dir;
 	struct mon_bin_hdr *ep;
 	char data_tag = 0;
 
@@ -415,11 +421,14 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
 			length = 0;
 			data_tag = '<';
 		}
+		/* Cannot rely on endpoint number in case of control ep.0 */
+		dir = USB_DIR_IN;
 	} else {
 		if (ev_type == 'C') {
 			length = 0;
 			data_tag = '>';
 		}
+		dir = 0;
 	}
 
 	if (rp->mmap_active)
@@ -440,21 +449,8 @@ static void mon_bin_event(struct mon_reader_bin *rp, struct urb *urb,
 	 */
 	memset(ep, 0, PKT_SIZE);
 	ep->type = ev_type;
-	switch (usb_endpoint_type(&urb->ep->desc)) {
-	case USB_ENDPOINT_XFER_CONTROL:
-		ep->xfer_type = PIPE_CONTROL;
-		break;
-	case USB_ENDPOINT_XFER_BULK:
-		ep->xfer_type = PIPE_BULK;
-		break;
-	case USB_ENDPOINT_XFER_INT:
-		ep->xfer_type = PIPE_INTERRUPT;
-		break;
-	default:
-		ep->xfer_type = PIPE_ISOCHRONOUS;
-		break;
-	}
-	ep->epnum = urb->ep->desc.bEndpointAddress;
+	ep->xfer_type = xfer_to_pipe[usb_endpoint_type(epd)];
+	ep->epnum = dir | usb_endpoint_num(epd);
 	ep->devnum = urb->dev->devnum;
 	ep->busnum = urb->dev->bus->busnum;
 	ep->id = (unsigned long) urb;
@@ -512,21 +508,9 @@ static void mon_bin_error(void *data, struct urb *urb, int error)
 
 	memset(ep, 0, PKT_SIZE);
 	ep->type = 'E';
-	switch (usb_endpoint_type(&urb->ep->desc)) {
-	case USB_ENDPOINT_XFER_CONTROL:
-		ep->xfer_type = PIPE_CONTROL;
-		break;
-	case USB_ENDPOINT_XFER_BULK:
-		ep->xfer_type = PIPE_BULK;
-		break;
-	case USB_ENDPOINT_XFER_INT:
-		ep->xfer_type = PIPE_INTERRUPT;
-		break;
-	default:
-		ep->xfer_type = PIPE_ISOCHRONOUS;
-		break;
-	}
-	ep->epnum = urb->ep->desc.bEndpointAddress;
+	ep->xfer_type = xfer_to_pipe[usb_endpoint_type(&urb->ep->desc)];
+	ep->epnum = usb_urb_dir_in(urb) ? USB_DIR_IN : 0;
+	ep->epnum |= usb_endpoint_num(&urb->ep->desc);
 	ep->devnum = urb->dev->devnum;
 	ep->busnum = urb->dev->bus->busnum;
 	ep->id = (unsigned long) urb;