Add some comments and debug info.
speedtouch.c | 30 ++++++++++++++++--------------
1 files changed, 16 insertions(+), 14 deletions(-)
diff -Nru a/drivers/usb/misc/speedtouch.c b/drivers/usb/misc/speedtouch.c
--- a/drivers/usb/misc/speedtouch.c Fri Feb 14 15:15:29 2003
+++ b/drivers/usb/misc/speedtouch.c Fri Feb 14 15:15:29 2003
@@ -187,8 +187,8 @@
struct list_head spare_buffers;
struct tasklet_struct send_tasklet;
- struct sk_buff *current_skb;
- struct udsl_send_buffer *current_buffer;
+ struct sk_buff *current_skb; /* being emptied */
+ struct udsl_send_buffer *current_buffer; /* being filled */
struct list_head filled_buffers;
};
@@ -329,13 +329,13 @@
struct udsl_receiver *rcv;
unsigned long flags;
- PDEBUG ("udsl_complete_receive entered\n");
-
if (!urb || !(rcv = urb->context) || !(instance = rcv->instance)) {
PDEBUG ("udsl_complete_receive: bad urb!\n");
return;
}
+ PDEBUG ("udsl_complete_receive entered (urb 0x%p, status %d)\n", urb,
+urb->status);
+
tasklet_schedule (&instance->receive_tasklet);
/* may not be in_interrupt() */
spin_lock_irqsave (&instance->completed_receivers_lock, flags);
@@ -353,6 +353,7 @@
struct urb *urb;
struct atmsar_vcc_data *atmsar_vcc = NULL;
struct sk_buff *new = NULL, *tmp = NULL;
+ int err;
PDEBUG ("udsl_process_receive entered\n");
@@ -425,9 +426,9 @@
UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE,
udsl_complete_receive,
rcv);
- if (!usb_submit_urb (urb, GFP_ATOMIC))
+ if (!(err = usb_submit_urb (urb, GFP_ATOMIC)))
break;
- PDEBUG ("udsl_process_receive: submission failed\n");
+ PDEBUG ("udsl_process_receive: submission failed (%d)\n", err);
/* fall through */
default: /* error or urb unlinked */
PDEBUG ("udsl_process_receive: adding to spare_receivers\n");
@@ -491,13 +492,13 @@
struct udsl_sender *snd;
unsigned long flags;
- PDEBUG ("udsl_complete_send entered\n");
-
if (!urb || !(snd = urb->context) || !(instance = snd->instance)) {
PDEBUG ("udsl_complete_send: bad urb!\n");
return;
}
+ PDEBUG ("udsl_complete_send entered (urb 0x%p, status %d)\n", urb,
+urb->status);
+
tasklet_schedule (&instance->send_tasklet);
/* may not be in_interrupt() */
spin_lock_irqsave (&instance->send_lock, flags);
@@ -515,6 +516,7 @@
struct sk_buff *skb;
unsigned char *target;
unsigned long flags;
+ int err;
PDEBUG ("udsl_process_send entered\n");
@@ -524,10 +526,10 @@
if (!list_empty (&instance->filled_buffers)) {
buf = list_entry (instance->filled_buffers.next, struct
udsl_send_buffer, list);
list_del (&buf->list);
- PDEBUG ("sending filled buffer\n");
+ PDEBUG ("sending filled buffer (0x%p)\n", buf);
} else if ((buf = instance->current_buffer)) {
instance->current_buffer = NULL;
- PDEBUG ("sending current buffer\n");
+ PDEBUG ("sending current buffer (0x%p)\n", buf);
} else /* all buffers empty */
break;
@@ -544,10 +546,10 @@
udsl_complete_send,
snd);
- PDEBUG ("submitting urb, contains %d cells\n", UDSL_SND_BUFFER_SIZE -
buf->free_cells);
+ PDEBUG ("submitting urb 0x%p, contains %d cells\n", snd->urb,
+UDSL_SND_BUFFER_SIZE - buf->free_cells);
- if (usb_submit_urb(snd->urb, GFP_ATOMIC) < 0) {
- PDEBUG ("submission failed!\n");
+ if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) {
+ PDEBUG ("submission failed (%d)!\n", err);
spin_lock_irqsave (&instance->send_lock, flags);
list_add (&snd->list, &instance->spare_senders);
spin_unlock_irqrestore (&instance->send_lock, flags);
@@ -653,7 +655,7 @@
{
struct udsl_instance_data *instance = vcc->dev->dev_data;
- PDEBUG ("udsl_atm_send called (skb 0x%p, skb->len %u)\n", skb, skb->len);
+ PDEBUG ("udsl_atm_send called (skb 0x%p, len %u)\n", skb, skb->len);
if (!instance) {
PDEBUG ("NULL instance!\n");
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