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Subject[044/136] USB: fix cdc-acm regression in open
2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Oliver Neukum <oliver@neukum.org>
commit 7af25b4b34a2439020d78da765a3bed0ff73f25c upstream.

cdc-acm needs to set a flag during open to tell the
tty layer that the device is initialized

Signed-off-by: Oliver Neukum <oliver@neukum.org>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Paul Martin <pm@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/usb/class/cdc-acm.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -59,6 +59,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
+#include <linux/serial.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
@@ -609,6 +610,7 @@ static int acm_tty_open(struct tty_struc
acm->throttle = 0;

tasklet_schedule(&acm->urb_task);
+ set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
done:
mutex_unlock(&acm->mutex);



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