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USB: cdc-acm: do not update PM busy on read errors

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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>
This commit is contained in:
Johan Hovold 2014-05-26 19:23:49 +02:00 committed by Greg Kroah-Hartman
parent b1d42efc21
commit 4a8ee5059a
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/class/cdc-acm.c
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@ -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 */