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Be more careful when setting the alternate interface.

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This commit is contained in:
augustss 2000-05-31 16:15:49 +00:00
parent 18cd73168e
commit ca8d562f6e
1 changed files with 9 additions and 5 deletions
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14
sys/dev/usb/usb_subr.c
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@ -1,4 +1,4 @@
/* $NetBSD: usb_subr.c,v 1.76 2000/04/27 15:26:50 augustss Exp $ */
/* $NetBSD: usb_subr.c,v 1.77 2000/05/31 16:15:49 augustss Exp $ */
/* $FreeBSD: src/sys/dev/usb/usb_subr.c,v 1.18 1999/11/17 22:33:47 n_hibma Exp $ */
/*
@ -440,15 +440,17 @@ usbd_fill_iface_data(dev, ifaceidx, altidx)
int altidx;
{
usbd_interface_handle ifc = &dev->ifaces[ifaceidx];
usb_interface_descriptor_t *idesc;
char *p, *end;
int endpt, nendpt;
DPRINTFN(4,("usbd_fill_iface_data: ifaceidx=%d altidx=%d\n",
ifaceidx, altidx));
ifc->device = dev;
ifc->idesc = usbd_find_idesc(dev->cdesc, ifaceidx, altidx);
if (ifc->idesc == 0)
idesc = usbd_find_idesc(dev->cdesc, ifaceidx, altidx);
if (idesc == NULL)
return (USBD_INVAL);
ifc->device = dev;
ifc->idesc = idesc;
ifc->index = ifaceidx;
ifc->altindex = altidx;
nendpt = ifc->idesc->bNumEndpoints;
@ -494,8 +496,10 @@ usbd_fill_iface_data(dev, ifaceidx, altidx)
return (USBD_NORMAL_COMPLETION);
bad:
if (ifc->endpoints != NULL)
if (ifc->endpoints != NULL) {
free(ifc->endpoints, M_USB);
ifc->endpoints = NULL;
}
return (USBD_INVAL);
}