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Commit 4a8ee505 authored May 26, 2014 by Johan Hovold Committed by Greg Kroah-Hartman May 27, 2014

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>

parent b1d42efc

drivers/usb/class/cdc-acm.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -416,13 +416,15 @@ static void acm_read_bulk_callback(struct urb *urb)
		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 */