USB: cdc-acm: do not update PM busy on read errors
There's no need to update the runtime PM last_busy field on read urb
errors (e.g. when the urb is being killed on shutdown).
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index f038f390..3c7cfac 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -416,13 +416,15 @@
dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__);
return;
}
- usb_mark_last_busy(acm->dev);
if (urb->status) {
dev_dbg(&acm->data->dev, "%s - non-zero urb status: %d\n",
__func__, urb->status);
return;
}
+
+ usb_mark_last_busy(acm->dev);
+
acm_process_read_urb(acm, urb);
/* throttle device if requested by tty */
