linux-kernel - [PatchV3 3/3] usb: plusb: Add debug to reset function

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Message-Id: <1302162015-22504-3-git-send-email-simon@mungewell.org>
Date:	Thu,  7 Apr 2011 00:40:15 -0700
From:	Simon Wood <simon@...gewell.org>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	Sergei Shtylyov <sshtylyov@...sta.com>, davem@...emloft.net,
	linux-usb@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Simon Wood <simon@...gewell.org>
Subject: [PatchV3 3/3] usb: plusb: Add debug to reset function

From: simon <simon@...ntu.(none)>

This patch adds some debug to the reset function to print out the
reason why it fails.

Signed-off-by: Simon Wood <simon@...gewell.org>
---
 drivers/net/usb/plusb.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/net/usb/plusb.c b/drivers/net/usb/plusb.c
index f46aa07..217aec8 100644
--- a/drivers/net/usb/plusb.c
+++ b/drivers/net/usb/plusb.c
@@ -94,11 +94,15 @@ pl_set_QuickLink_features(struct usbnet *dev, int val)
 
 static int pl_reset(struct usbnet *dev)
 {
+	int status;
+
 	/* some units seem to need this reset, others reject it utterly.
 	 * FIXME be more like "naplink" or windows drivers.
 	 */
-	(void) pl_set_QuickLink_features(dev,
+	status = pl_set_QuickLink_features(dev,
 		PL_S_EN|PL_RESET_OUT|PL_RESET_IN|PL_PEER_E);
+	if (status != 0 && netif_msg_probe(dev))
+		netif_dbg(dev, link, dev->net, "pl_reset --> %d\n", status);
 	return 0;
 }
 
-- 
1.7.4.1

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