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authorJohan Hovold <jhovold@gmail.com>2014-05-26 19:23:44 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-27 15:04:09 -0700
commite4c36076c2a6195ec62c35b03c3fde84d0087dc8 (patch)
treeb54f08f5d9173f475d8421753b756b91a858b32a /drivers/usb/class
parent8727bf689a77a79816065e23a7a58a474ad544f9 (diff)
USB: cdc-acm: fix I/O after failed open
Make sure to kill any already submitted read urbs on read-urb submission failures in open in order to prevent doing I/O for a closed port. Fixes: 088c64f81284 ("USB: cdc-acm: re-write read processing") Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-acm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 6c6928a154bd..eddeba61a88c 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -506,6 +506,7 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
{
struct acm *acm = container_of(port, struct acm, port);
int retval = -ENODEV;
+ int i;
dev_dbg(&acm->control->dev, "%s\n", __func__);
@@ -556,6 +557,8 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
return 0;
error_submit_read_urbs:
+ for (i = 0; i < acm->rx_buflimit; i++)
+ usb_kill_urb(acm->read_urbs[i]);
acm->ctrlout = 0;
acm_set_control(acm, acm->ctrlout);
error_set_control: