linux-kernel - [PATCH] Input: cm109 - fix checking return value of usb_control

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Date:	Thu, 25 Aug 2011 22:06:50 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	"Alfred E. Heggestad" <aeh@...org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org
Subject: [PATCH] Input: cm109 - fix checking return value of usb_control_msg

If successful, usb_control_msg returns the number of bytes transferred,
otherwise a negative error number.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/input/misc/cm109.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c
index b09c7d1..b741338 100644
--- a/drivers/input/misc/cm109.c
+++ b/drivers/input/misc/cm109.c
@@ -475,7 +475,7 @@ static void cm109_toggle_buzzer_sync(struct cm109_dev *dev, int on)
 				le16_to_cpu(dev->ctl_req->wIndex),
 				dev->ctl_data,
 				USB_PKT_LEN, USB_CTRL_SET_TIMEOUT);
-	if (error && error != EINTR)
+	if ((error < 0) && (error != -EINTR))
 		err("%s: usb_control_msg() failed %d", __func__, error);
 }
 
-- 
1.7.4.1



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