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[PATCH] USB: fix omninet driver bug

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I introduced this way back in 2.6.13 when adding the port lock logic.
This device talks out through different "ports" all at the same time, so
the lock logic was wrong, preventing any data from ever being sent
properly.

Thanks a lot to Bernhard Reiter <bernhard@intevation.de> for being
patient and helping with debugging this.

Cc: Bernhard Reiter <bernhard@intevation.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2006-05-02 08:44:45 +02:00
parent 815ddc99dd
commit df3fccb14a
1 changed files with 6 additions and 6 deletions
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12
drivers/usb/serial/omninet.c
View file

@ -257,14 +257,14 @@ static int omninet_write (struct usb_serial_port *port, const unsigned char *buf
return (0);
}
spin_lock(&port->lock);
if (port->write_urb_busy) {
spin_unlock(&port->lock);
spin_lock(&wport->lock);
if (wport->write_urb_busy) {
spin_unlock(&wport->lock);
dbg("%s - already writing", __FUNCTION__);
return 0;
}
port->write_urb_busy = 1;
spin_unlock(&port->lock);
wport->write_urb_busy = 1;
spin_unlock(&wport->lock);
count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
@ -283,7 +283,7 @@ static int omninet_write (struct usb_serial_port *port, const unsigned char *buf
wport->write_urb->dev = serial->dev;
result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
if (result) {
port->write_urb_busy = 0;
wport->write_urb_busy = 0;
err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
} else
result = count;