> On May 9, 2012, at 2:12 PM, Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx> wrote:
> Can you test this patch? It should make the driver ignore the second
> interface with no endpoints.
> --- a/drivers/media/video/usbvision/usbvision-video.c
> +++ b/drivers/media/video/usbvision/usbvision-video.c
> @@ -1504,6 +1504,11 @@ static int __devinit usbvision_probe(struct usb_interface *intf,
> interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
> else
> interface = &dev->actconfig->interface[ifnum]->altsetting[0];
> + if (interface->desc.bNumEndpoints < 1) {
> + dev_err(&intf->dev, "%s: interface %d. has no endpoints\n",
> + __func__, ifnum);
> + return -ENODEV;
> + }
> endpoint = &interface->endpoint[1].desc;
> if (!usb_endpoint_xfer_isoc(endpoint)) {
> dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
Leaving a reply for reference: while trying to add support for another
device [1], I noticed that the fix for CVE-2015-7833 [2] contained a
check similar to the one in Zary's patch:
(from commit fa52bd506f274b7619955917abfde355e3d19ffe)
drivers/media/usb/usbvision/usbvision-video.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/media/usb/usbvision/usbvision-video.c
b/drivers/media/usb/usbvision/usbvision-video.c
index b693206..d1dc1a1 100644
--- a/drivers/media/usb/usbvision/usbvision-video.c
+++ b/drivers/media/usb/usbvision/usbvision-video.c
@@ -1463,9 +1463,23 @@ static int usbvision_probe(struct usb_interface *intf,
if (usbvision_device_data[model].interface >= 0)
interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
- else
+ else if (ifnum < dev->actconfig->desc.bNumInterfaces)
interface = &dev->actconfig->interface[ifnum]->altsetting[0];
+ else {
+ dev_err(&intf->dev, "interface %d is invalid, max is %d\n",
+ ifnum, dev->actconfig->desc.bNumInterfaces - 1);
+ ret = -ENODEV;
+ goto err_usb;
+ }
+
+ if (interface->desc.bNumEndpoints < 2) {
+ dev_err(&intf->dev, "interface %d has %d endpoints, but must"
+ " have minimum 2\n", ifnum, interface->desc.bNumEndpoints);
+ ret = -ENODEV;
+ goto err_usb;
+ }
endpoint = &interface->endpoint[1].desc;
+
if (!usb_endpoint_xfer_isoc(endpoint)) {
dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
__func__, ifnum);
I can still reproduce the "cannot change alternate number to 1
(error=-22)" issue, however. Unless something else is broken, e.g. in
my card definition, I haven't made any progress myself on figuring out
why this happens.
[1] usbvision: problems adding support for ATI TV Wonder USB Edition
https://www.spinics.net/lists/linux-media/msg95854.html
[2] usbvision: fix crash on detecting device with invalid configuration
https://www.spinics.net/lists/linux-media/msg94831.html
Christopher A. Chavez
On Wed, May 9, 2012 at 2:12 PM, Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx> wrote:
> On Wednesday 09 May 2012 18:20:18 Bruno Martins wrote:
>> On 05/09/2012 04:32 PM, Ondrej Zary wrote:
>> > On Wednesday 09 May 2012, Bruno Martins wrote:
>> >> Hello guys,
>> >>
>> >> Has anyone ever got this to working under any Linux distro, including
>> >> Fedora?
>> >>
>> >> I have just plugged it in and I get this on dmesg:
>> >>
>> >> [ 1365.932522] usb 2-1.1: new full-speed USB device number 26 using
>> >> ehci_hcd [ 1366.073145] usb 2-1.1: New USB device found, idVendor=07d0,
>> >> idProduct=0004 [ 1366.073153] usb 2-1.1: New USB device strings: Mfr=0,
>> >> Product=0, SerialNumber=0 [ 1366.091741] usbvision_probe: Dazzle Fusion
>> >> Model DVC-80 Rev 1 (PAL) found [ 1366.092072] USBVision[0]: registered
>> >> USBVision Video device video1 [v4l2] [ 1366.092091] usbvision_probe:
>> >> Dazzle Fusion Model DVC-80 Rev 1 (PAL) found [ 1366.092149]
>> >> USBVision[1]: registered USBVision Video device video2 [v4l2] [
>> >> 1366.092182] usbcore: registered new interface driver usbvision [
>> >> 1366.092184] USBVision USB Video Device Driver for Linux : 0.9.11 [
>> >> 1366.189268] saa7115 15-0025: saa7113 found (1f7113d0e100000) @ 0x4a
>> >> (usbvision-2-1.1) [ 1366.319647] usb 2-1.1: selecting invalid altsetting
>> >> 1
>> >> [ 1366.319658] usb 2-1.1: cannot change alternate number to 1
>> >> (error=-22)
>> >>
>> >> Device is recognized since it appears in lsusb:
>> >>
>> >> [skorzen@g62 ~]$ lsusb | grep DVC
>> >> Bus 002 Device 026: ID 07d0:0004 Dazzle DVC-800 (PAL) Grabber
>> >>
>> >> However, I cannot make it work (my goal is to capture video from a
>> >> camcorder).
>> >> I've tried using cheese for this, but it just crashes and ABRT
>> >> launches for me to fill a bug.
>> >>
>> >> Any ideas?
>> >
>> > Please include the output of "lsusb -v" for this device (run the command
>> > as root).
>>
>> Here it is, mate. Thanks for your cooperation.
>>
>> Bus 002 Device 005: ID 07d0:0004 Dazzle DVC-800 (PAL) Grabber
>> Device Descriptor:
>> bLength 18
>> bDescriptorType 1
>> bcdUSB 1.00
>> bDeviceClass 0 (Defined at Interface level)
>> bDeviceSubClass 0
>> bDeviceProtocol 0
>> bMaxPacketSize0 8
>> idVendor 0x07d0 Dazzle
>> idProduct 0x0004 DVC-800 (PAL) Grabber
>> bcdDevice 1.00
>> iManufacturer 0
>> iProduct 0
>> iSerial 0
>> bNumConfigurations 1
>> Configuration Descriptor:
>> bLength 9
>> bDescriptorType 2
>> wTotalLength 468
>> bNumInterfaces 2
>> bConfigurationValue 2
>> iConfiguration 0
>> bmAttributes 0x80
>> (Bus Powered)
>> MaxPower 500mA
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 0
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0000 1x 0 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0000 1x 0 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 1
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x037f 1x 895 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 2
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x033f 1x 831 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 3
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x02ff 1x 767 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 4
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x02bf 1x 703 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 5
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x027f 1x 639 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 6
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x023f 1x 575 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 7
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x01ff 1x 511 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 8
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x01bf 1x 447 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 9
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x017f 1x 383 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 10
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x013f 1x 319 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 11
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x00ff 1x 255 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 12
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x00bf 1x 191 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 13
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x007f 1x 127 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 0
>> bAlternateSetting 14
>> bNumEndpoints 3
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x01 EP 1 OUT
>> bmAttributes 0
>> Transfer Type Control
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0008 1x 8 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x82 EP 2 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x003f 1x 63 bytes
>> bInterval 1
>> Endpoint Descriptor:
>> bLength 7
>> bDescriptorType 5
>> bEndpointAddress 0x83 EP 3 IN
>> bmAttributes 1
>> Transfer Type Isochronous
>> Synch Type None
>> Usage Type Data
>> wMaxPacketSize 0x0042 1x 66 bytes
>> bInterval 1
>> Interface Descriptor:
>> bLength 9
>> bDescriptorType 4
>> bInterfaceNumber 1
>> bAlternateSetting 0
>> bNumEndpoints 0
>> bInterfaceClass 0 (Defined at Interface level)
>> bInterfaceSubClass 0
>> bInterfaceProtocol 0
>> iInterface 0
>> Device Status: 0x0000
>> (Bus Powered)
>>
>> Best regards,
>
> Can you test this patch? It should make the driver ignore the second
> interface with no endpoints.
>
> --- a/drivers/media/video/usbvision/usbvision-video.c
> +++ b/drivers/media/video/usbvision/usbvision-video.c
> @@ -1504,6 +1504,11 @@ static int __devinit usbvision_probe(struct usb_interface *intf,
> interface = &dev->actconfig->interface[usbvision_device_data[model].interface]->altsetting[0];
> else
> interface = &dev->actconfig->interface[ifnum]->altsetting[0];
> + if (interface->desc.bNumEndpoints < 1) {
> + dev_err(&intf->dev, "%s: interface %d. has no endpoints\n",
> + __func__, ifnum);
> + return -ENODEV;
> + }
> endpoint = &interface->endpoint[1].desc;
> if (!usb_endpoint_xfer_isoc(endpoint)) {
> dev_err(&intf->dev, "%s: interface %d. has non-ISO endpoint!\n",
