On Mon, 13 Feb 2006, Peter Wippich wrote:
> thank you for your response. Trying to actualy run the driver with
> PTD_TRACE enabled is not realy possible. As soon as I open my device I get
> flooded with repeated messages:
>
> [ 122.480000] td: f 8i2 0,64,64 0 101
> .....................
You can cut the amount of log very much down by adding to
the beginning of dump_ptd() in isp116x.h the following
check:
if (PTD_GET_CC(ptd) == 0xf)
return;
>
> I will try to set up some other debugging environment on Wendesday (I'm
> out off office tomorrow) and than get back to you.
I thought a little bit more about it. It would be good to
print out some more info right before the BUG() is hit.
Could you please apply the patch below (I didn't test it,
hopefully it is clean).
Olav
PS! I am wondering whether the driver in newer kernels might
work better.
--- linux-2.6.14-or/drivers/usb/host/isp116x-hcd.c.or 2006-02-14
10:09:23.000000000 +0200
+++ linux-2.6.14-or/drivers/usb/host/isp116x-hcd.c 2006-02-14
10:41:56.000000000 +0200
@@ -532,11 +532,13 @@ static void start_atl_transfers(struct i
} else if (ep->nextpid == USB_PID_ACK) {
len = 0;
} else {
+ int len1, len2, len3 = -77777, len4 = -77777;
+
/* Find current free length ... */
- len = (MAX_LOAD_LIMIT - load) / byte_time;
+ len1 = len = (MAX_LOAD_LIMIT - load) / byte_time;
/* ... then limit it to configured max size ... */
- len = min(len, speed == USB_SPEED_LOW ?
+ len2 = len = min(len, speed == USB_SPEED_LOW ?
MAX_TRANSFER_SIZE_LOWSPEED :
MAX_TRANSFER_SIZE_FULLSPEED);
@@ -546,11 +548,25 @@ static void start_atl_transfers(struct i
(urb->transfer_buffer_length -
urb->actual_length)) {
len -= len % ep->maxpacket;
+ len3 = len;
if (!len)
continue;
} else
- len = urb->transfer_buffer_length -
+ len4 = len = urb->transfer_buffer_length -
urb->actual_length;
+ if (len < 0)
+ printk("-- len: %d %d %d %d\n"
+ "load %d byte_time %d speed %d\n"
+ "transfer_buffer_length %d "
+ "actual_length %d\n"
+ "ep: %d %d %d %d %d\n"
+ len1, len2, len3, len4,
+ (int)load, byte_time, speed,
+ urb->transfer_buffer_length,
+ urb->actual_length,
+ (int)ep->maxpacket, (int)ep->epnum,
+ (int)ep->nextpid, (int)ep->error_count,
+ (int)ep->length);
BUG_ON(len < 0);
}
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