[media] em28xx: update description of em28xx_irq_callback

em28xx_irq_callback can be used for isoc and bulk transfers.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/usb/em28xx/em28xx-core.c b/drivers/media/usb/em28xx/em28xx-core.c
index 0892d92..8f50f5c 100644 (file)
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -919,7 +919,7 @@ EXPORT_SYMBOL_GPL(em28xx_set_mode);
    ------------------------------------------------------------------*/
 
 /*
- * IRQ callback, called by URB callback
+ * URB completion handler for isoc/bulk transfers
  */
 static void em28xx_irq_callback(struct urb *urb)
 {
@@ -946,6 +946,7 @@ static void em28xx_irq_callback(struct urb *urb)
 
        /* Reset urb buffers */
        for (i = 0; i < urb->number_of_packets; i++) {
+               /* isoc only (bulk: number_of_packets = 0) */
                urb->iso_frame_desc[i].status = 0;
                urb->iso_frame_desc[i].actual_length = 0;
        }