In both 2.4.23 and 2.6.0, usbdevice_fs.h has:
struct usbdevfs_urb {
...
unsigned int signr; /* signal to be sent on error, -1 if none should be sent
*/
...
Yet devio.c has:
static int proc_submiturb(struct dev_state *ps, void *arg)
{
...
if (uurb.signr != 0 && (uurb.signr < SIGRTMIN || uurb.signr > SIGRTMAX))
return -EINVAL;
...
>From include/asm/signal.h, SIGRTMIN == 32, SIGRTMAX == 31.
There are two things I don't understand about this:
1) It looks like a value of -1 will return an error.
Is the comment in usbdevice_fs.h wrong?
2) It appears that only 0 is allowed. When is this used?
Don Reid
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