From 308fee18e0f06215b47b54a2b254bfaf55527bdd Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@gmail.com>
Date: Mon, 26 May 2014 19:23:50 +0200
Subject: [PATCH] USB: cdc-acm: remove redundant usb_mark_last_busy

There's no need to call usb_mark_last_busy after having increased the PM
counter in write(). The device will be marked busy by USB core when the
PM counter is balanced in the completion handler.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/class/cdc-acm.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 3c7cfac48e302..8f654ce525706 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -690,7 +690,6 @@ static int acm_tty_write(struct tty_struct *tty,
 		spin_unlock_irqrestore(&acm->write_lock, flags);
 		return count;
 	}
-	usb_mark_last_busy(acm->dev);
 
 	stat = acm_start_wb(acm, wb);
 	spin_unlock_irqrestore(&acm->write_lock, flags);
-- 
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