[PATCH] usbserial: Regression in USB generic serial driver

[Randall Nortman <linuxkernellist@wonderclown.com>]

Kernel version 2.6.13 introduced a regression in the generic USB
serial converter driver (usbserial.o, drivers/usb/serial/generic.c).
The bug manifests, as far as I can tell, whenever you attempt to write
to the device -- the write will never complete (write() returns 0, or
blocks).

Signed-off-by: Randall Nortman <oss@wonderclown.org>
---
I'm sending this a second time, after reading up on the right way to
submit a patch (much thanks to Chris Wright).  Now we see if I'm
capable of following instructions properly.

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -223,7 +223,7 @@ int usb_serial_generic_write_room (struc
 	dbg("%s - port %d", __FUNCTION__, port->number);
 
 	if (serial->num_bulk_out) {
-		if (port->write_urb_busy)
+		if (!(port->write_urb_busy))
 			room = port->bulk_out_size;
 	}