Hi all,
I'm writing a driver for our (custom-made) USB-serial converter using
the usb_serial module. In order to setup the converter I have to send
some Control URBs to the converter. Sending one Control URB works fine.
But if I want to send more than one Control URB, I have to wait for the
completion hanlder to finish, before I can send the next URB. (Please
correct me, if I'm wrong) I need the result of the previous Control URB
to determine what Control URB to send next.
Now here comes my question: How do I wait?
I tried to wait with wait_queue and wake_up, but the kernel hangs.
Kernel 2.4.18-3 (Red hat 7.3)
Kind regards
Thomas Wahrenbruch
static void my_complete( struct urb *purb )
{
char* p_dummy;
int i;
struct usb_serial_port *port;
p_dummy = purb->transfer_buffer;
printk(KERN_DEBUG "Transfer Buffer: ");
for (i = 0; i < 8; i++) {
printk(KERN_DEBUG "%02X ", (short)( p_dummy[i] & 0x00FF) );
}
usb_unlink_urb( purb );
// notify ?!
}
static int open()
{
FILL_CONTROL_URB(.....);
result = usb_submit_urb( my_urb );
// wait for completion handler !?
if (transfer_buffer[x] == z) {
FILL_CONTROL_URB(.....);
result = usb_submit_urb( my_urb );
} else {
....
}
return 0;
}
_______________________________________________________________
Don't miss the 2002 Sprint PCS Application Developer's Conference
August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
