diff options
| -rw-r--r-- | drivers/media/usb/gspca/gspca.c | 20 | ||||
| -rw-r--r-- | drivers/media/usb/gspca/gspca.h | 1 |
2 files changed, 15 insertions, 6 deletions
diff --git a/drivers/media/usb/gspca/gspca.c b/drivers/media/usb/gspca/gspca.c index f3a7ace0fac9..f9a75adcf637 100644 --- a/drivers/media/usb/gspca/gspca.c +++ b/drivers/media/usb/gspca/gspca.c @@ -603,10 +603,13 @@ static void gspca_stream_off(struct gspca_dev *gspca_dev) } /* - * look for an input transfer endpoint in an alternate setting + * look for an input transfer endpoint in an alternate setting. + * + * If xfer_ep is invalid, return the first valid ep found, otherwise + * look for exactly the ep with address equal to xfer_ep. */ static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, - int xfer) + int xfer, int xfer_ep) { struct usb_host_endpoint *ep; int i, attr; @@ -616,7 +619,8 @@ static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; if (attr == xfer && ep->desc.wMaxPacketSize != 0 - && usb_endpoint_dir_in(&ep->desc)) + && usb_endpoint_dir_in(&ep->desc) + && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) return ep; } return NULL; @@ -689,7 +693,8 @@ static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, found = 0; for (j = 0; j < nbalt; j++) { ep = alt_xfer(&intf->altsetting[j], - USB_ENDPOINT_XFER_ISOC); + USB_ENDPOINT_XFER_ISOC, + gspca_dev->xfer_ep); if (ep == NULL) continue; if (ep->desc.bInterval == 0) { @@ -862,7 +867,8 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev) /* if bulk or the subdriver forced an altsetting, get the endpoint */ if (gspca_dev->alt != 0) { gspca_dev->alt--; /* (previous version compatibility) */ - ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer); + ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, + gspca_dev->xfer_ep); if (ep == NULL) { pr_err("bad altsetting %d\n", gspca_dev->alt); return -EIO; @@ -904,7 +910,8 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev) if (!gspca_dev->cam.no_urb_create) { PDEBUG(D_STREAM, "init transfer alt %d", alt); ret = create_urbs(gspca_dev, - alt_xfer(&intf->altsetting[alt], xfer)); + alt_xfer(&intf->altsetting[alt], xfer, + gspca_dev->xfer_ep)); if (ret < 0) { destroy_urbs(gspca_dev); goto out; @@ -2030,6 +2037,7 @@ int gspca_dev_probe2(struct usb_interface *intf, } gspca_dev->dev = dev; gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; + gspca_dev->xfer_ep = -1; /* check if any audio device */ if (dev->actconfig->desc.bNumInterfaces != 1) { diff --git a/drivers/media/usb/gspca/gspca.h b/drivers/media/usb/gspca/gspca.h index 300642dc1a17..f06253cd7469 100644 --- a/drivers/media/usb/gspca/gspca.h +++ b/drivers/media/usb/gspca/gspca.h @@ -205,6 +205,7 @@ struct gspca_dev { char memory; /* memory type (V4L2_MEMORY_xxx) */ __u8 iface; /* USB interface number */ __u8 alt; /* USB alternate setting */ + int xfer_ep; /* USB transfer endpoint address */ u8 audio; /* presence of audio device */ /* (*) These variables are proteced by both usb_lock and queue_lock, |