I tried open three USB Camera under USB Hub，the USB port and the USB Hub both are USB3.0;But when I running my promgram,it said “No space left on device”; Could I know that if you has good ways or ideas to deal this problem?
#define ENOSPC 28 /* No space left on device */
if (stream->dev->quirks & UVC_QUIRK_PROBE_MINMAX) {
ret = -ENOSPC;
goto done；
}
nvidia@tegra-ubuntu:~$ dmesg | grep -i usb
......
[ 1897.888906] input: USB2.0 Camera as /devices/3530000.xhci/usb1/1-1/1-1:1.0/input/input12
[ 1898.172787] usb 1-1: 3:1: cannot get freq at ep 0x84
[ 1898.180473] usb 1-1: Warning! Unlikely big volume range (=8191), cval->res is probably wrong.
[ 1898.189095] usb 1-1: [3] FU [Mic Capture Volume] ch = 1, val = 0/8191/1
[ 1898.556655] usb 1-1: 3:1: cannot get freq at ep 0x84
[ 1898.813954] usb 1-1: 3:1: cannot get freq at ep 0x84
[ 1899.152108] usb 1-1: 3:1: cannot get freq at ep 0x84
[ 1899.409560] usb 1-1: 3:1: cannot get freq at ep 0x84
[ 1904.174140] usb 1-2.2: Not enough bandwidth for new device state.
[ 1904.180367] usb 1-2.2: Not enough bandwidth for altsetting 11
[ 1911.919915] usb 1-2.2: Not enough bandwidth for new device state.
[ 1911.933004] usb 1-2.2: Not enough bandwidth for altsetting 11
[ 1921.650510] usb 1-2.2: Not enough bandwidth for new device state.
[ 1921.656640] usb 1-2.2: Not enough bandwidth for altsetting 11
[ 2440.340837] usb 1-2.2: Not enough bandwidth for new device state.
[ 2440.347004] usb 1-2.2: Not enough bandwidth for altsetting 11
[ 2486.169384] usb 1-2.2: USB disconnect, device number 9
[ 2506.591738] usb 1-2.2: new high-speed USB device number 15 using xhci-tegra
[ 2506.825412] usb 1-2.2: New USB device found, idVendor=1bcf, idProduct=2283
[ 2506.832378] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2506.839871] usb 1-2.2: Product: Aoni HD Camera
[ 2506.844410] usb 1-2.2: Manufacturer: Sunplus IT Co
......