From dae3ddba36f8c337fb59cef07d564da6fc9b7551 Mon Sep 17 00:00:00 2001 From: Tobias Herzog Date: Sat, 22 Sep 2018 22:11:10 +0200 Subject: cdc-acm: do not reset notification buffer index upon urb unlinking Resetting the write index of the notification buffer on urb unlink (e.g. closing a cdc-acm device from userspace) may lead to wrong interpretation of further received notifications, in case the index is not 0 when urb unlink happens (i.e. when parts of a notification already have been transferred). On the device side there is no "reset" of the notification transimission and thus we would get out of sync with the device. Signed-off-by: Tobias Herzog Acked-by: Oliver Neukum Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/class/cdc-acm.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers') diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 1833912f7f5f..e43ea9641416 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -355,7 +355,6 @@ static void acm_ctrl_irq(struct urb *urb) case -ENOENT: case -ESHUTDOWN: /* this urb is terminated, clean up */ - acm->nb_index = 0; dev_dbg(&acm->control->dev, "%s - urb shutting down with status: %d\n", __func__, status); -- cgit v1.2.3