diff options
Diffstat (limited to 'usb-linux.c')
| -rw-r--r-- | usb-linux.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/usb-linux.c b/usb-linux.c index 3aaa93bd86..ded0726dad 100644 --- a/usb-linux.c +++ b/usb-linux.c @@ -544,6 +544,10 @@ static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration) int interface, nb_interfaces; int ret, i; + for (i = 0; i < USB_MAX_INTERFACES; i++) { + dev->dev.altsetting[i] = 0; + } + if (configuration == 0) { /* address state - ignore */ dev->dev.ninterfaces = 0; dev->dev.configuration = 0; @@ -997,6 +1001,10 @@ static int usb_host_set_interface(USBHostDevice *s, int iface, int alt) } } + if (iface >= USB_MAX_INTERFACES) { + return USB_RET_STALL; + } + si.interface = iface; si.altsetting = alt; ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si); @@ -1007,6 +1015,8 @@ static int usb_host_set_interface(USBHostDevice *s, int iface, int alt) if (ret < 0) { return ctrl_error(); } + + s->dev.altsetting[iface] = alt; usb_linux_update_endp_table(s); return 0; } |