Am Samstag, 25. September 2004 07:42 schrieb justin:
> static void bally_read_bulk_callback (struct urb *purb)
> {
> � struct usb_bally *dev = (struct usb_bally *)purb->context;
> � int result = 0;
> �
> � // if interrupted, just return
> � if (purb->status == -ENOENT)
> � {
> � � return;
> � }
> �
> � dbg("adding %d to ringbuf", purb->actual_length);
> �
> � // add the data to the ringbuffer
> � down(&dev->mutex);
You must not use down() in the context of a callback. It may
deadlock.
> � ringbuf_add(&dev->ringbuffer, purb->transfer_buffer, purb->actual_length);
> � up(&dev->mutex);
HTH
Oliver
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