On Wed, Jun 06, 2012 at 06:46:21PM +0200, Otto Meta wrote: > From: Otto Meta <otto.patches@xxxxxxxxxxxxxxxx> > > Currently CDC-ACM devices stay throttled when their TTY is closed while > throttled, stalling further communication attempts after the next open. > > Unthrottling during open/activate got lost starting with kernel > 3.0.0 and this patch reintroduces it. > > Signed-off-by: Otto Meta <otto.patches@xxxxxxxxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> Acked-by: Johan Hovold <jhovold@xxxxxxxxx> > --- > All stable 3.x kernels are affected in addition to 3.5-rc1 and this patch > works with all of them. > > Patch v2 now with hopefully all necessary newlines. > > --- linux-3.5-rc1.orig/drivers/usb/class/cdc-acm.c 2012-06-03 03:29:26.000000000 +0200 > +++ linux-3.5-rc1/drivers/usb/class/cdc-acm.c 2012-06-06 12:59:20.725654552 +0200 > @@ -567,6 +567,14 @@ > > usb_autopm_put_interface(acm->control); > > + /* > + * Unthrottle device in case the TTY was closed while throttled. > + */ > + spin_lock_irq(&acm->read_lock); > + acm->throttled = 0; > + acm->throttle_req = 0; > + spin_unlock_irq(&acm->read_lock); > + > if (acm_submit_read_urbs(acm, GFP_KERNEL)) > goto error_submit_read_urbs; -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
