V4L/DVB (9717): em28xx: improve message probing logs

On some em28xx devices, there's an unused interface. This is printed on
the logs as an error. We can just ignore that interface.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index b262091..5cf32ae 100644 (file)
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -2196,12 +2196,6 @@ static int em28xx_usb_probe(struct usb_interface *interface,
                return -ENODEV;
        }
 
-       em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
-                       udev->descriptor.idVendor,
-                       udev->descriptor.idProduct,
-                       ifnum,
-                       interface->altsetting[0].desc.bInterfaceClass);
-
        endpoint = &interface->cur_altsetting->endpoint[0].desc;
 
        /* check if the device has the iso in endpoint at the correct place */
@@ -2212,21 +2206,39 @@ static int em28xx_usb_probe(struct usb_interface *interface,
                /* It's a newer em2874/em2875 device */
                isoc_pipe = 0;
        } else {
+               int check_interface = 1;
                isoc_pipe = 1;
                endpoint = &interface->cur_altsetting->endpoint[1].desc;
                if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
-                   USB_ENDPOINT_XFER_ISOC) {
-                       em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
-                       em28xx_devused &= ~(1<<nr);
-                       return -ENODEV;
-               }
-               if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
-                       em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
+                   USB_ENDPOINT_XFER_ISOC)
+                       check_interface = 0;
+
+               if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
+                       check_interface = 0;
+
+               if (!check_interface) {
+                       em28xx_err(DRIVER_NAME " video device (%04x:%04x): "
+                               "interface %i, class %i found.\n",
+                               udev->descriptor.idVendor,
+                               udev->descriptor.idProduct,
+                               ifnum,
+                               interface->altsetting[0].desc.bInterfaceClass);
+
+                       em28xx_err(DRIVER_NAME " This is an anciliary "
+                               "interface not used by the driver\n");
+
                        em28xx_devused &= ~(1<<nr);
                        return -ENODEV;
                }
+
        }
 
+       em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
+                       udev->descriptor.idVendor,
+                       udev->descriptor.idProduct,
+                       ifnum,
+                       interface->altsetting[0].desc.bInterfaceClass);
+
        if (nr >= EM28XX_MAXBOARDS) {
                printk(DRIVER_NAME ": Supports only %i em28xx boards.\n",
                                EM28XX_MAXBOARDS);