/**
* gigaset_read_int_callback
*
* It is called if the data was received from the device.
*/
static void gigaset_read_int_callback(struct urb *urb, struct pt_regs *regs)
{
struct inbuf_t *inbuf = urb->context;
struct cardstate *cs = inbuf->cs;
int resubmit = 0;
int r;
unsigned numbytes;
unsigned char *src;
unsigned long flags;
if (!urb->status) {
if (!cs->connected) {
err("%s: disconnected", __func__); /* should never happen */
return;
}
numbytes = urb->actual_length;
if (numbytes) {
src = inbuf->rcvbuf;
if (unlikely(*src))
dev_warn(cs->dev,
"%s: There was no leading 0, but 0x%02x!\n",
__func__, (unsigned) *src);
++src; /* skip leading 0x00 */
--numbytes;
if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
gigaset_schedule_event(inbuf->cs);
}
} else
gig_dbg(DEBUG_INTR, "Received zero block length");
resubmit = 1;
} else {
/* The urb might have been killed. */
gig_dbg(DEBUG_ANY, "%s - nonzero read bulk status received: %d",
__func__, urb->status);
if (urb->status != -ENOENT) { /* not killed */
if (!cs->connected) {
err("%s: disconnected", __func__); /* should never happen */
return;
}
resubmit = 1;
}
}
if (resubmit) {
spin_lock_irqsave(&cs->lock, flags);
r = cs->connected ? usb_submit_urb(urb, SLAB_ATOMIC) : -ENODEV;
spin_unlock_irqrestore(&cs->lock, flags);
if (r)
dev_err(cs->dev, "error %d when resubmitting urb.\n",
-r);
}
}
/*
* Interrupt Input URB completion routine
*/
static void gigaset_read_int_callback(struct urb *urb)
{
struct cardstate *cs = urb->context;
struct inbuf_t *inbuf = cs->inbuf;
int status = urb->status;
int r;
unsigned numbytes;
unsigned char *src;
unsigned long flags;
if (!status) {
numbytes = urb->actual_length;
if (numbytes) {
src = cs->hw.usb->rcvbuf;
if (unlikely(*src))
dev_warn(cs->dev,
"%s: There was no leading 0, but 0x%02x!\n",
__func__, (unsigned) *src);
++src; /* skip leading 0x00 */
--numbytes;
if (gigaset_fill_inbuf(inbuf, src, numbytes)) {
gig_dbg(DEBUG_INTR, "%s-->BH", __func__);
gigaset_schedule_event(inbuf->cs);
}
} else
gig_dbg(DEBUG_INTR, "Received zero block length");
} else {
/* The urb might have been killed. */
gig_dbg(DEBUG_ANY, "%s - nonzero status received: %d",
__func__, status);
if (status == -ENOENT || status == -ESHUTDOWN)
/* killed or endpoint shutdown: don't resubmit */
return;
}
/* resubmit URB */
spin_lock_irqsave(&cs->lock, flags);
if (!cs->connected) {
spin_unlock_irqrestore(&cs->lock, flags);
pr_err("%s: disconnected\n", __func__);
return;
}
r = usb_submit_urb(urb, GFP_ATOMIC);
spin_unlock_irqrestore(&cs->lock, flags);
if (r)
dev_err(cs->dev, "error %d resubmitting URB\n", -r);
}
